Application Manual – Part 2: Draft Planning Integrated solutions for power distribution in commercial and industrial buildings power totally integrated Contents 1 1.1 1.2 Planning with Totally Integrated Power Introduction Draft Planning (System and Integration Planning) 1/2 1/3 6.4 6.3 Requirements of the Switchgear in the Three Circuit Types Container Solutions 6/11 6/14 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Power System 7 Overview Dimensioning of Power Distribution Systems System Protection and Safety Coordination Protection Equipment for Low-Voltage Power Systems Selectivity in Low-Voltage Systems Protection of Capacitors Protection of Distribution Transformers Protection of Technical Building Installations – Lightning Current and Overvoltage Protection 2/62 2/2 2/10 2/14 2/20 2/41 2/52 2/53 7.1 7.2 Busbar Trunking Systems Cables and Wires 7/2 7/10 Busbar Trunking Systems, Cables and Wires 8 8.1 8.2 8.3 Subdistribution Systems General Configuration Selectivity and Back-up Protection Small Distribution Boards and Wall- or Floor-Mounted Distribution Boards 8/6 8/9 8/2 8/2 8/3 3 3.1 3.2 3.3 3.4 3.5 Medium Voltage Introduction Basics of Switchgear Requirements on Medium-Voltage Switchgear Siemens Medium-Voltage Switchgear From Medium-Voltage Switchgear to Turnkey Solutions 3/25 3/2 3/3 3/7 3/9 8.4 8.5 Circuit Protection Devices 9 9.1 9.2 9.3 Power Consumers Starting, Switching and Protecting Motors Lighting Elevator Systems 9/2 9/8 9/19 3.6 Protection of Power Distribution Systems and Switchgear 3/28 4 4.1 4.2 Transformers Distribution Transformers Control and Isolating Transformers 4/2 4/6 10 Ease of Operation, Safety and Control Engineering 10.1 Power Management with SIMATIC powercontrol 10.2 Building Management System 10.3 Energy Automation for the Industry 10/2 10/7 10/14 10/20 5 5.1 5.2 Power Generation Grid-Connected Photovoltaic (PV) Systems Basis for the Use of UPS 5/2 5/5 10.4 Safety Lighting Systems 10.5 Robust Remote Terminal Unit for Extreme Environmental Conditions (SIPLUS RIC) 10/27 11 Appendix 6 6.1 6.2 Low Voltage Low-Voltage Switchgear Protective and Switching Devices in the Low-Voltage Power Distribution 6/9 6/2 Conversion Factors and Tables Volume Non-metric SI unit unit 1 in3 3 1 cm 1 ft3 3 1 dm 1 yd3 =1l 1 fl oz 1 quart m3 1 pint Non-metric unit 1 gallon 1 barrel 1 in3 1 ft3 1 yd3 SI unit 1 fl oz Volume flow rate Pressure Non-metric unit SI unit 3 16.387in3 = 0.034 fl oz 0.061 cm Non-metric SI unit unit Non-metric SI unit unit 0.264 gallons/s 3.785 l/s 0.0044m3/h = 227 l/h 0.227 gallons/min 4.405 gallons/min = 101.941 m3/h 0.589 ft3/min = 0.0098 ft3/s 1.699 m3/h SI Non-metric unit unit 3.785 l/s 0.264 gallons/s 0.227 m3/h = 227 l/h 0.0044 gallons/min 101.941 m3/h 4.405 gallons/min = 3 1.699 ft3 /h 0.589 m /min = 0.0098 ft3/s Non-metric SI unit unit 1 in HG bar = 105 1 psi pa = 102 kpa 1 lbf/ft2 1 lbf/in2 1 tonf/ft2 1 tonf/in2 Non-metric unit 1 in HG SI unit 1 psi 1 bar 1 lbf/ft2 = 105 pa = 102 kpa 1 lbf/in2 1 tonf/ft2 1 tonf/in2 Non-metric SI unit unit 0.034 bar 29.53 in Hg = 14.504 psi 0.069 bar = 2088.54 lbf/ft2 = 4.788 x 10-4 bar = 14.504 lbf/in2 = 4.882 x 10-4 kgf/cm2 0.932 tonf/ft2 = 0.069 bar = 0.070 kgf/cm2 6.457 x 10-3 tonf/in2 (= 1.02 kgf/cm2) 1.072 bar = 1.093 kgf/cm2 154.443 bar = 2 157 .488 kgf/cmSI unit Non-metric 0.034 bar unit 0.069 bar 29.53 in Hg = 4.788 x 10-4 bar = 14.504 10 = 4.882 x psi-4 kgf/cm2 2088.54 lbf/ft2 = 0.069 bar = 0.070 kgf/cm2 14.504 lbf/in2 = 1.072 bar = 1.093 kgf/cm2 0.932 tonf/ft2 = -3 6.457 x bar tonf/in2 154.443 10 = (= 1.02 kgf/cm22 157 .488 kgf/cm ) 28.317 dm3= 0.028 m3 61.024 in3 = 0.765 m3 = 1.057 quarts = 0.035 ft 1 l/s 1 gallon/s l/h 1 gallon/min m /s 1 ft33/h 1 ft3/min Non-metric unit SI unit 1 gallon/s 1 l/s 1 gallon/min 1 l/h 1 ft3/s 1 m3/h 1 ft3/min 2.114 pint 3 29.574 cm= 0.473 3.785 dm3 dm3 0.264 gallons 0.946 dm3 = 0.946 l 0.629 barrels = 0.473 l SI unit = 3.785 l m3 158,987 16.387 cm = 1.589 = 159 l 28.317 dm3 = 0.028 m3 0.765 m3 Non-metric unit 29.574 cm3 3 dm3 cm3 1 quart 1 pint 0.061 in3 = 0.946 l 0.946 dm3= 0.034 fl oz 61.024 in3 = 0.473 dm3 = 0.473 l 0.035 ft3 = 3.785 l 3.785 dm3 =1.057 quarts = 2. 14 pint = 0.264 gallons 1 158,987 dm3 = 1.589 m3 = 159 lbarrels 0.629 Force Non-metric SI unit unit lbf 1N 1 kgf 1 kN 1 tonf Non-metric unit SI unit 1 lbf 1N 1 kgf Non-metric SI unit unit 3.281 ft/s = 1,098 km/h 0.305 m/s= 2.237 miles/h 0.911 m/s = 1,609 km/h 0.447 ft/s = 0.621 miles/h Non-metric SI unit unit 3.281 ft/s = 1,098 km/h 0.305 m/s= 2.237 miles/h 0.911 m/s = 1,609 km/h 0.447 ft/s = 0.621 miles/h dm3 =1l 1 gallon 1 barrel 1 m3 Non-metric unit SI unit 4.448 N 0.225 lbf = 0.102 kgf 9.807 N 0.100 tonf 9.964 kN Velocity Non-metric SI unit unit m/s 1 ft/s km/h 1 mile/h SI unit Non-metric unit 1 m/s 1 ft/s 1 km/h 1 mile/h SI unit Non-metric unit 4.448 N 0.225 lbf = 0.102 kgf 9.807 N Energy, work y Non-metric SI unit unit 1 hp h kWh 1 J lbf ft Non-metric unit SI unit 6 0.746 hp h = 2.655 kgf mJ 1.341 kWh = 2.684 x 10 = 2.737105 J5 kgf m 3.6 x x 10 1 kN 1 tonf 0.100 tonf 9.964 kN Torque, moment of force Non-metric SI unit unit 1 lbf in Nm 1 lbf ft Non-metric unit SI unit 0.113 Nm in 0.012 kgflbf ft 8.851 lbf = = 0.738 m (= 0.102 kgf m) 1.356 Nm = 0.138 kgf m Non-metric SI unit unit 8.851 lbf = = 0.738 m 0.113 Nm in 0.012 kgflbf ft (= 0.102 kgf m) 1.356 Nm = 0.138 kgf m Non-metric SI unit unit Nm 1 lbf in Mass, weight Non-metric SI unit unit 1 oz g 1 lb kg 1 sh ton t SI unit Non-metric unit 1g 1 oz 1 kg 1 lb 1t 1 sh ton Non-metric unit SI unit 28.35 g 0.035 oz 0.454 lb = 35.27 oz 2.205 kg = 453.6 g 0.907sh= 907 2,205 lb .2 1.102 t ton = kg Non-metric unit SI unit 0.035 oz 28.35 g 2.205 lb = 35.27 oz 0.454 kg = 453.6 g 1.102 sh ton = 2,205 lb 0.907 t = 907 kg .2 1 lbf ft 0.138 kgf m hp h = 3.725 x 10-7 0.738 ft = = 1.055 kJ lbf 1055.06 J 1 Btu 9.478 x kcal) (= 0.25210-4 Btu (= 2.388 x 10-4 kcal) Non-metric 1 kgf m 3.653 x 10-6 hp h = SI unit unit 7 .233 ft lbf 1.341 hp h = 2.655 kgf m 1 kWh Non-metric = 3.6 x 105 J SI unit unit 1J 3.725 x 10-7 hp h = 0.746 kWh = 2.684 x 106 J 1 hp h 0.738 ft lbf =5 = 2.737 x 10 kgf m 9.478 x 10-4 Btu 0.138 kgf 10 1 ft lbf (= 2.388 xm -4 kcal) kgf 1 Btu m 1.055 x = 1055.06 3.653 kJ10-6 hp h = J (= 7 0.252 kcal) .233 ft lbf Moment of inertia J Numerical value equation: Non-metric SI unit unit lbf ft 2 1 kg m2 J= GD2 = Wr 2 4 Non-metric unit SI unit 0.04214 kg 23.73 lb ft2 m2 Non-metric SI unit unit 23.73 lb ft2 m2 0.04214 kg Non-metric SI unit unit 2 1 kg m2 1 lbf ft Conversion Factors and Tables Conductor cross sections in the Metric and US System Metric cross sections acc. to IEC Conductor cross section [mm2] American Wire Gauge (AWG) 8m Equivalent metric CSA AWG or MCM [mm2] 7m 0.75 0.653 0.832 1.040 1.310 19 AWG 17 16 15 14 6m 18 1.50 1.650 2.080 2m 2.620 3.310 13 12 11 10 6.00 10.00 10.550 13.300 7 6 5 4m 6.630 8.370 9 8 16.00 25.00 35.00 50.00 70.00 95.00 120.00 150.00 185.00 240.00 300.00 400.00 500.00 625.00 16.770 21.150 26.670 33.630 42.410 53.480 67 .430 85.030 107 .200 126.640 152.000 202.710 253.350 304.000 354.710 405.350 506.710 3 2 1 1/0 2/0 3/0 4/0 250 MCM 300 400 500 600 700 800 1000 3m 4 1m 2m 1m M 1 : 100 M 1 : 20 M 1 : 50 1m 3m 5m 7m 9m 4.00 4.170 5.260 5m 2.50 11 m 13 m 15 m 3m Conversion Factors and Tables Specific steam consumption Non-metric unit 1 lb/hp h SI unit 1 kg/kWh SI unit 0.608 kg/kWh Non-metric unit 1.644 lb/hp h Planning with Totally Integrated Power chapter 1 1.1 Introduction 1.2 Draft Planning (System and Integration Planning) 1 Planning with Totally Integrated Power 1.1 Introduction Today, the focus is on cost of investment, when power supply systems for commercial, institutional and industrial building projects are planned. Operating and energy costs, on the other hand, may not be neglected, as they can have a lasting effect on the total cost balance across the building’s life cycle. Investigations of the Scientific Council of the German Federal Government on Global Environmental Change found in 2003 that world consumption of primary energy is going to double by 2050 (assumption: world population growth to 9 to 10 billion people). Among other consequences, this would mean that energy would become noticeably more expensive. If sustainable building management and * Also see Chapter 11, A1, Standards, Regulations and Guidelines optimal utilization of resources is considered in the planning stage already, an important step will have been made toward the minimization of a building’s operating costs, and thus toward its longterm value increase. So electrical engineering consultants are entrusted with the responsible task of designing power supply systems under the aspects of operational safety and energy efficiency. Services rendered must be in accordance with the generally accepted rules of good practice. This means that implementing orders, administrative regulations, relevant IEC, European (EN) and national DIN standards as well as the general building inspection certificates and general building permits must also be observed across building contract sections in the planning.* Concepts like Totally Integrated Power (TIP) now provide support for increasingly complex engineering tasks. They facilitate planning with integrated solutions for power distribution and efficient engineering tools. Totally Integrated Power with its wellmatched components and optimized interfaces offers everything that can be expected from a future-oriented power distribution system. Very good engineering support is also rendered by the TÜV-approved and certified dimensioning tool SIMARIS design. Using SIMARIS design for dimensioning electrical power distribution systems in commercial, institutional and industrial buildings produces easy, fast and safe results. Further information on Totally Integrated Power SIMARIS design can be obtained on the Internet at www.siemens.com/tip Fig. 1.1/1: Safety, environmental compatibility and profitability of power supply and distribution are demanding challenges to the planning of modern building and infrastructure projects 1/2 Totally Integrated Power by Siemens Planning with Totally Integrated Power 1.2 Draft Planning (System and Integration Planning) Building upon the concept drafted in the “Preliminary Planning” phase 2, power distribution must be planned in detail in the “Draft Planning” phase 3. The Application Manual “Totally Integrated Power – Draft Planning” provides technical assistance and information on components for technical installations in buildings with a focus on “electrical power supply.” Services in detail, which are an integral part of “Draft Planning”, are defined in the Regulation of Architects' and Engineers' Fees (HOAI) in Germany. Based upon preliminary planning results, Draft Planning represents the definite planning concept including all components specified. In projects requiring a permit, the Draft Planning is the basis for the subsequent Approval Planning phase. Basic services Elaboration of the planning concept (step by step preparation of drawings) that takes into account requirements concerning aspects of urban development and design, functions, technology, building physics, profitability, energy management (e.g. regarding efficient power utilization and the use of renewable energies) and landscape ecology, and integrates contributions of other parties involved in the planning, until a complete draft is presented Integration of services rendered by other experts involved in the planning Description of the building project including an explanation of compensation and substitution measures as stipulated by the impact regulation under nature protection law Graphic presentation of the overall draft, e.g. elaborated, complete preliminary outline and/or outline drawings (scale depending on the size of the building project; for outdoor facilities at scales of 1:500 to 1:100, detailing in particular the improvements for biotope functions, preventive, protective, care and development activities as well as on differentiated planting; for space enclosing developments: in scales of 1:50 to 1:20, in particular with details of wall design as well as color, light and material design; if necessary including detailed plans of repetitive groups of enclosed space; negotiations with public authorities and other experts involved in planning as to whether an official approval can be obtained Cost calculations in compliance with DIN 276 or according to statutory provisions for cost calculations of residential dwellings Summary of all draft documents Cost controlling by a comparison of the cost calculation with the cost estimate Special services Analysis of alternatives/variants and their assessment including an investigation into costs involved (optimization) Profitability calculation Cost calculation by setting up quantity structures or a catalog of components Elaboration of special measures for the optimization of the building or building sections, which exceed the normal range of engineering services, on the reduction of energy consumption as well as pollutant and CO2 emissions, and for the use of renewable energies in coordination with other experts involved in planning. The normal measure for energy saving activities means the fulfillment of requirements set by statutory provisions and generally accepted rules of good practice. Table 1.2/1: Overview of the planner’s major tasks in the first two project stages according to the HOAI (Regulation of Architects' and Engineers' Fees) (excerpt) 1/3 1 1/4 Totally Integrated Power by Siemens Power System chapter 2 2.1 Overview 2.2 Dimensioning of Power Distribution Systems 2.3 System Protection and Safety Coordination 2.4 Protection Equipment for Low-Voltage Power Systems 2.5 Selectivity in Low-Voltage Systems 2.6 Protection of Capacitors 2.7 Protection of Distribution Transformers 2.8 Protection of Technical Building Installations – Lightning Current and Overvoltage Protection 2 Power System 2.1 Overview 2.1.1 System Configurations Table 2.1/1 illustrates the technical aspects and influencing factors that should be taken into account when electrical power distribution systems are planned and network components are dimensioned. Simple radial system (spur line topology) All consumers are centrally supplied from one power source. Each connecting line has an unambiguous direction of energy flow. Radial system with changeover connection as power reserve – partial load: All consumers are centrally supplied from two to n power sources. They are rated as such that each of it is capable of supplying all consumers directly connected to the main power distribution system (stand-alone operation with open couplings). If one power source fails, the remaining sources of supply can also supply some consumers connected to the other power source. In this case, any other consumer must be disconnected (load shedding). Radial system with changeover connection as power reserve – full load: All consumers are centrally supplied from two to n power sources (standalone operation with open couplings). They are rated as such that, if one power source fails, the remaining power sources are capable of additionally supplying all those consumers normally supplied by this power source. No consumer must be disconnected. In this case, we speak of rating the power sources according to the (n-1) principle. With three parallel power sources or more, other supply principles, e.g. the (n-2) principle would also be possible. In this case, these power sources will be rated as such that two out of three transformers can fail without the continuous supply of all consumers connected being affected. Radial system in an interconnected grid Individual radial networks in which the consumers connected are centrally supplied by one power source are additionally coupled electrically with other radial networks by means of coupling connections. All couplings are normally closed. Depending on the rating of the power sources in relation to the total load connected, the application of the (n-1) principle, (n-2) principle etc. can ensure continuous and faultless power supply of all consumers by means of additional connecting lines. LV- side system configurations Quality criterion Simple radial system 1 Low cost of investment Low power losses High reliability of supply Great voltage stability Easy operation Easy and clear system protection High adaptability Low fire load 2 3 4 5 1 Radial system with changeover connection as power reserve Partial load 2 3 4 5 1 Full load 2 3 4 5 Radial system in an inter- connected grid 1 2 3 4 5 Radial system with power distribution via busbars 1 2 3 4 5 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Rating: very good (1) to poor (5) fulfillment of a quality criterion Table 2.1/1: Exemplary quality rating dependent on the power system configuration 2/2 Totally Integrated Power by Siemens Power System The direction of energy flow through the coupling connections may vary depending on the line of supply, which must be taken into account for subsequent rating of switching/protective devices, and above all for making protection settings. Radial system with power distribution via busbars In this special case of radial systems that can be operated in an interconnected grid, busbar trunking systems are used instead of cables. In the coupling circuits, these busbar trunking systems are either used for power transmission (from radial system A to radial system B etc.) or power distribution to the respective consumers. Characteristics Low cost of investment Little expense for system extensions Any switchgear/protective technology can be used Ground fault detection can be implemented Fault currents and impedance conditions in the system can be calculated Stability of the grounding system High degree of operational safety High degree of protection High degree of shock hazard protection High degree of fire safety Automatic disconnection for protection purposes can be implemented EMC-friendly Equipment functions maintained in case of 1st ground or enclosure fault Fault localization during system operation Reduction of system downtimes by controlled disconnection TN-C 1 2 3 TN-C/S 1 2 3 TN-S 1 2 3 IT system TT system 1 2 3 1 2 3 • • • • • • • • • • • • • • • 1 = true • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 3 = not true 2.1.2 Power Supply Systems according to the Type of Connection to Ground TN-C, TN-C/S, TN-S, IT and TT systems The implementation of IT systems may be required by national or international standards. For parts of installations which have to meet particularly high requirements regarding operational and human safety (e.g. in medical rooms, such as the OT, intensive care or post-anaesthesia care unit) For installations erected and operated outdoors (e.g. in mining, at cranes, garbage transfer stations and in the chemical industry). Depending on the power system and nominal system voltage there may be different requirements regarding the disconnection times to be met (protection of persons against indirect contact with live parts by means of automatic disconnection). 2 = conditionally true Table 2.1/2: Exemplary quality rating dependent on the power supply system according to its type of connection to ground Power systems in which electromagnetic interference plays an important part should preferably be configured as TN-S systems immediately downstream of the point of supply. Later, it will mean a comparatively high expense to turn existing TN-C or TN-C/S systems into an EMC-compatible system. The state of the art for TN systems is an EMC-compatible design as TN-S system. Further information Power system engineering: Siemens AG (Ed.): TIP Application Manual Establishment of Basic Data and Preliminary Planning, 2006, Chapters 4.1 and 7 EMC: Siemens AG (Ed.): TIP Application Manual Establishment of Basic Data and Preliminary Planning, 2006, Chapter 7 Design of the low-voltage main distribution system Siemens AG (Ed.): TIP Application Manual Establishment of Basic Data and Preliminary Planning, 2006, Section 5.8 Motors see Chapter 9 in this manual 2/3 2 Checklist Important electrical parameters of the higher-level medium-voltage systems Local supply network operator Point of supply: Under responsibility of local supply network operator / customer Neutral-point connection of power system ........................................................................ low resistance grounded compensated isolated Maximum short-circuit current Ik max " Alternatively, maximum system short-circuit rating Sk max " Minimum short-circuit current Ik min " Alternatively, minimum system short-circuit rating Sk min " Data of higher-level medium-voltage protection Current transformer Iprim Isec Type of protection relay applied: Thermal overload protection available? Type of characteristic curve: Setting zone Ith Setting zone I > Setting zone I >> yes inverse-time-delayed no definite-time-delayed ........................ A ........................ A ........................ kA ........................ MVA ........................ kA ........................ MVA ........................................................................ ........................ A / time constant ........................ min ........................ A / t > ........................ s ........................ A / t >> ........................ s Note: For preparing a comprehensive, end-to-end protection concept, the precise data of the higher-level medium-voltage protection applied are required, so that the lower-level low-voltage protection system can be adapted in accordance with the MV protection settings. Further information on medium-voltage switchgear: Siemens AG (Ed.), TIP Application Manual - Establishment of Basic Data and Preliminary Planning, 2006, Section 5.1 2/4 Totally Integrated Power by Siemens Power System Checklist Important electrical parameters of transformers Uprim / Usec Rating Rated short-circuit voltage ukr Winding losses Pk No-load losses P0 Overload capability (vented/unvented transformers) Power reserve ........................ % ........................ % ........................ kV ........................ kVA ........................ % ........................ kW ........................ kW Note: The rated short-circuit voltage ukr is a measure for the amount of voltage to be applied at the primary side in order to reach the rated current level, when the secondary-side winding is shorted. ukr is a measure for the transformer’s short-circuit power. As a rule, the higher ukr, the lower the short-circuit power. High-quality transformers (e.g. GEAFOL) are characterized by reduced winding and no-load losses, which should be taken into account for a profitability evaluation. if transformers with cross-flow fans are used, their overloadability must be considered for rating the feeding lines, switching devices and their protection settings. Short-circuit current determination: The level of short-circuit current which a transformer can supply is independent of its design with or without cross-flow ventilation. The magnitude of the short-circuit current is solely determined by the rated short-circuit voltage ukr . Technical considerations for the connection of motor loads: to determine regenerative feedback from motors in the event of a short circuit, the sum total of installed motor loads is required. Further information on distribution transformers: Siemens AG (Ed.), TIP Application Manual - Establishment of Basic Data and Preliminary Planning, 2006, Section 5.2 2/5 2 Checklist Important electrical parameters of generators Main use: No-break standby generating set* Quick-starting standby generating set* Safety power supply* Nominal voltage Rating " Subtransient reactance xd " Initial symmetrical short-circuit current Ik 1-phase sustained short-circuit current Ik1D Available for period t 3-phase sustained short-circuit current Ik1D Available for period t R/X ratio yes yes yes ........................ V ........................ kVA ........................ % ........................ kA ........................ A ........................ s ........................ A ........................ s ........................ no no no * Safety power supply in compliance with IEC 60364-7-710, DIN VDE 0100-710 and -718; designed as no-break standby generating set according to customer specifications Note: Normally, generators can only supply the initial symmetrical short-circuit AC current Ik for a period of few milliseconds. " Therefore, the sustained short-circuit currents which the generator can carry over a longer period of time are relevant for the protective settings of devices using time-delayed short-circuit releases. Above data must be obtained from the equipment manufacturer. Rating of switching/protective devices for generator operation: selective response of these switching/protective devices can be expected if the rating of the largest consumer connected is less than 1/3 of the generator output. What is important for emergency lighting is the full compliance with standards from the point of supply to the consumers (also see Section 10.4 “Safety Lighting Systems”). Further information on generators: Siemens AG (Ed.): TIP Application Manual - Establishment of Basic Data and Preliminary Planning, 2006, Section 5.7 2/6 Totally Integrated Power by Siemens Power System Checklist Important electrical parameters of a combined heat and power plant Main use: Safety power supply* Redundant power supply Nominal voltage Rating " Subtransient reactance xd " Initial symmetrical short-circuit current Ik 1-phase sustained short-circuit current Ik 1D Available for period t 3-phase sustained short-circuit current Ik 1D Available for period t R/X ratio yes yes ........................ V ........................ kVA ........................ % ........................ kA ........................ A ........................ s ........................ A ........................ s ........................ no no * Safety power supply in compliance with IEC 60364-7-710, DIN VDE 0100-710 and -718; designed as no-break standby generating set according to customer specifications Note: Normally, combined heat and power plants are modularly designed and supply electricity and heat. They are based on the principle of combined heat and power generation. The output of a combined heat and power plant is usually designed as such that only a part of the maximum heating energy demand of the connected consumers is covered when the plant is operated under full load. These co-generating plants are operated on a heat-demand basis. What is important for emergency lighting is the full compliance with standards from the point of supply to the consumers (also see Section 10.4 “Safety Lighting Systems”). 2/7 2 Checklist Important electrical parameters of uninterruptible power supplies (UPS) Nominal voltage Rating Load power factor UPS factor Static or dynamic system Time curve of short-circuit currents (1-phase, 2-phase, 3-phase) Interconnection of primary circuits Availability of internal protection equipment in the primary circuits Switching/protective response of internal protection equipment Internal operational response in the event of a short circuit ........................ ........................ ........................ ........................ ........................ ........................ V ........................ kVA ........................ ........................ ........................ Note: Uninterruptible power supplies for power supply systems are available in ratings of about 5 kW up to several 100 kW. Their rating basically depends on the load carrying capability of the power converters. Another important feature of a UPS is the maximum power outage bridging time which depends on the capacity of the storage batteries. Depending on requirements, it may be just a few seconds or several hours. If high power and long bridging times are required, power generating sets, so-called dynamic systems, are also used. Above data must be obtained from the equipment manufacturer. Further information on UPS! Siemens AG (Ed.): TIP Application Manual - Establishment of Basic Data and Preliminary Planning, 2006, Section 5.6, and Section 5.2 in this manual. 2/8 Totally Integrated Power by Siemens Power System Checklist Compilation of the intended system operating modes in the supply section Which system operating mode is intended for this plant? System operating mode 1: System operating mode 2: System operating mode 3: Other: ................................................................................................................................... ................................................................................................................................... ................................................................................................................................... ................................................................................................................................... Examples: System operating mode 1: Normal power supply 3 out of 3 transformers connected Generator down Coupling 1 closed Coupling 2 closed System operating mode 2: Transformer T1 in maintenance 2 out of 3 transformers connected (transformer 1 down) Generator down Coupling 1 closed Coupling 2 closed System operating mode 3: Emergency power supply Transformers down Generator connected into supply Coupling 1 open Coupling 2 open Note: Alternative system operating modes from different sources of supply are important for determining minimum and maximum short-circuit currents as well as subsequent device protection settings even if merely an extension of the existing plant is considered. 2/9 2 2.2 Dimensioning of Power Distribution Systems When the basic supply concept for the electricity supply system has been established, it is necessary to dimension the electrical power system. Dimensioning means the sizing/rating of all equipment and components to be used in this power system. The dimensioning target is to obtain a technically permissible combination of switching/protective devices and connecting line for each circuit in the power system. Basic rules On principle, circuit dimensioning shall be performed in compliance with the technical rules / standards listed in Fig. 2.2/1. Details are explained below under Section 2.2.1 Circuit Types. Cross-circuit dimensioning When selected network components and systems are matched, an econom- ically efficient overall system can be designed. This cross-circuit matching of network components may bear any degree of complexity, as subsequent modifications to certain components, e.g. a switch or protective device, may have effects on the neighboring, higher-level, or all lower-level network sections (high testing expense, high planning risk). Dimensioning principles For each circuit, the dimensioning process comprises the selection of Protection against overload IEC 60364-4-43 DIN VDE 0100 Part 430 Protection against short circuit IEC 60364-4-43 / IEC 60364-5-54 DIN VDE 0100 Part 430 / Part 540 Protection against electric shock IEC 60364-4-41 DIN VDE 0100 Part 410 Dynamic/static voltage drop IEC 60364-5-520 IEC 60038 DIN VDE 0100 Part 520 DIN VDE 0175 Dynamic/static selectivity IEC 60364-7-710 IEC 60947-2 IEC 60898-1 DIN VDE 0100 Part 710 and 718 VDE 0660-101 VDE 0641 Part 11 Fig. 2.2/1: Relevant standards for circuit dimensioning 2/10 Totally Integrated Power by Siemens Power System Supply Connecting line between distribution boards Load feeders in final circuits overload (e.g. using vented transformers). Independent of the load currents established, dimensioning of any further component in a supply circuit is oriented to the ratings of the power sources, the system operating modes configured and all the related switching states in the vicinity of the supply system. As a rule, switching/protective devices must be selected in such a way that the planned performance maximum can be transferred. In addition, the different minimum/maximum shortcircuit current conditions in the vicinity of the supply system, which are dependent on the switching status, must be determined. When connecting lines are rated (cable or busbar), appropriate reduction factors must be taken into account, which depend on the number of systems laid in parallel and the installation type. When devices are rated, special attention should be paid on their rated short-circuit breaking capacity. You should also opt for a high-quality tripping unit with variable settings, as this component is an important basis for attaining the best possible selectivity towards all upstream and downstream devices. Distribution circuit Dimensioning of cable routes and devices follows the maximum load currents to be expected at this distribution level. As a rule Ib max = ∑ installed capacity x simultaneity factor Switching/protective device and connecting line are to be matched with regard to overload and shortcircuit protection. Start node Transmission medium Load Target node Fig. 2.2/2: Schematic representation of the different circuit types one, or more than one switching/protective device to be used at the beginning or end of a connecting line, as well as the selection of the connecting line itself (cable/line or busbar connection) under consideration of the technical features of the corresponding switching/protective devices. For supply circuits in particular, dimensioning also includes rating the power sources. The objectives of dimensioning may vary depending on the circuit type. The dimensioning target of overload and short-circuit protection can be attained in correlation to the mounting location of the protective equipment. Devices applied at the end of a connecting line can ensure overload protection for this line at best, not, however, short-circuit protection! Supply circuits Particularly high requirements apply to the dimensioning of supply circuits. This starts with the rating of the power sources. Power sources are rated according to the maximum load current to be expected for the power system, the desired amount of reserve power, and the degree of supply reliability required in case of a fault (overload / short circuit). Load conditions in the entire power system are established by taking the energy balance (in an “energy report”). Reserve power and operational safety in the vicinity of the supply system are usually established by building up appropriate redundancies, for example by providing additional power sources (transformer, generator, UPS); rating the power sources according to the failure principle, n- or (n–1) principle: applying the (n–1) principle means that two out of three supply units are principally capable of continually supplying the total load for the power system without any trouble if the smallest power source fails; rating those power sources that can temporarily be operated under 2.2.1 Circuit types The basic dimensioning rules and standards listed in Fig. 2.2/1 principally apply to all circuit types. In addition, there are specific requirements for these circuit types which will be explained in detail below. 2/11 2 In order to ensure overload protection, you must also observe the standardized conventional (non-)tripping currents referring to the devices in application. A verification based merely on the rated device current or the setting value Ir would be insufficient. Basic rules for ensuring overload protection: Rated current rule Non-adjustable protective equipment Ib ≤ In ≤ Iz The rated current In of the selected device must be between the calculated maximum load current Ib and the maximum permissible load current Iz of the selected transmission medium (cable or busbar). Adjustable protective equipment Ib ≤ Ir ≤ Iz The rated current Ir of overload release must be between the calculated maximum load current Ib and the maximum permissible load current Iz of the selected transmission medium (cable or busbar). Tripping current rule I2 ≤ 1.45 x Iz The maximum permissible load current Iz of the selected transmission medium (cable or busbar) must be above the conventional tripping current I2 /1.45 of the selected device. The test value I2 is standardized and varies according to type and characteristics of the protective equipment applied. Basic rules for ensuring shortcircuit protection: Short-circuit energy K 2S 2 ≥ I 2t (K = material coefficient; S = cross section) The amount of energy that is set free from the moment, when a short circuit occurs, until it is cleared automatically, must at any time be less than the energy which the transmission medium can carry as a maximum before irreparable damage is caused. As standard, this basic rule applies in the time range up to max. 5 s. Below 100 ms of short-circuit breaking time, the let-through energy of the protective device (acc. to equipment manufacturer’s specification) must be taken into account. When devices with a tripping unit are used, observance of this rule across the entire characteristic device curve must be verified. A mere verification in the range of the maximum short-circuit current applied (Ik max) is not always sufficient, in particular, when time-delayed releases are used. of a cable route can ensure overload protection for this line only. Final circuits The method for coordinating overload and short-circuit protection is practically identical for distribution and final circuits. Besides overload and shortcircuit protection, the protection of human life is also important for all circuits. Protection against electric shock ta (Ik1 min) ≤ ta perm If a 1-phase fault to ground (Ik1 min) occurs, the resulting current breaking time ta for the selected protective equipment must be shorter than the maximum permissible breaking time ta perm which is required for this circuit according to IEC 60364-4-41 / DIN VDE 0100-410 to ensure the protection of persons. As the required maximum current breaking time varies according to the nominal system voltage and the type of load connected (stationary and non-stationary loads), protection requirements regarding minimum breaking times ta perm may be transferred from one load circuit to other circuits. Alternatively, this protection target may also be achieved by observing a maximum touch voltage. As final circuits are often characterized by long supply lines, their dimensioning is often affected by the maximum permissible voltage drop. As far as the choice of switching/protective devices is concerned, it is important to bear in mind that long connecting lines are characterized by high impedances and thus strong attenuation of the calculated shortcircuit currents. Short-circuit time ta (Ik min) ≤ 5 s The resulting current breaking time of the selected protective equipment must ensure that the calculated minimum short-circuit current Ik min at the end of the transmission line or protected line is automatically cleared within 5 s at the latest. Overload and short-circuit protection needn’t necessarily be provided by one and the same device. If required, these two protection targets may be realized by a device combination. The use of separate switching/protective devices could also be considered, i.e. at the start and end of a cable route. As a rule, devices applied at the end 2/12 Totally Integrated Power by Siemens Power System Depending on the system operating mode (coupling open, coupling closed) and the medium of supply (transformer or generator), the protective equipment and its settings must be configured for the worst case concerning short-circuit currents. In contrast to supply or distribution circuits, where the choice of a highquality tripping unit is considered very important, there are no special requirements on the protective equipment of final circuits regarding the degree of selectivity to be achieved. The use of a tripping unit with LI characteristics is normally sufficient. For reasons of risk minimization and time efficiency, a number of engineering companies generally use advanced calculation software, such as SIMARIS design, to perform dimensioning and verification processes in electrical power systems. 2.2.3 Summary Basically, the dimensioning process itself is easy to understand and can be performed using simple means. Its complexity lies in the procurement of the technical data on products and systems required, which can be found in various technical standards and regulations on the one hand and numerous product catalogs on the other. An important aspect in this context is the cross-circuit manipulation of dimensioned components owing to their technical data, for example, the above mentioned inheritance of minimum current breaking times of the non-stationary load circuit to other stationary load or distribution circuits. Another aspect is the mutual impact of dimensioning network calculation (short circuit), e.g. for the use of short-circuit current limiting devices. In addition, the complexity of the matter rises, when different national standards or installation practices are to be taken into account for dimensioning. 2/13 2 2.3 System Protection and Safety Coordination This chapter basically comprises the installation of electrical equipment in LV systems. Therefore, the emphasis lies on the low-voltage side also when dealing with network protection. Specific network protection requirements for medium voltage are dealt with in Section 3.6 ”Protection of Medium-Voltage Switchgear.” System configurations While in building and industrial power systems ring-system configurations are normally used for medium voltage, radial system configurations are normally preferred for the low-voltage side (radial systems, double spur systems). A number of switchgear substations and distribution boards are required for distributing power from the point of supply to the consumers. The protective devices for these items of equipment are connected in series. Objectives of system protection The objective of system protection is to detect faults and to selectively isolate faulted parts of the system. It must also permit short clearance times to limit the fault power and the effect of arcing faults. High power density, high individual power outputs, and the relatively short distances in industrial and building power systems mean that low-voltage and medium-voltage systems are closely linked. Activities in the LV system (short circuits, starting currents) also have an effect on the MV system, and vice versa, the control state of the MV system affects the selectivity criteria in the secondary power system. It is, therefore, necessary to adjust the power system and its protection throughout the entire distribution system and to coordinate the protective functions. 2.3.1 Definitions Electrical installations in a power system are protected either by protection equipment allocated to the installation components or by combinations of these protective elements. Standby protection When a protective device fails, the higher-level device must take over this protective function. Back-up protection If a short circuit, which is higher than the rated switching capacity of the protective device used, occurs at a particular point in the system, back-up protection must provide protection for the downstream installation component and for the protection device by means of an upstream protective device. Rated short-circuit breaking capacity The rated short-circuit breaking capacity is the maximum value of the short circuit that the protective device is able to clear according to specifications. The protection device may be used in power systems for rated switching capacities up to this value. Selectivity Selectivity, in particular, has become a topic for discussion in the previous years. Partly, it has become a general requirement in tender specifications. Due to the complexity of this issue, information about proper selection and application is often insufficient. These requirements as well as the effects of full or partial selectivity in power distribution systems within the context of the relevant standard, industry, country, system configuration or structure should be clarified in advance with the network planners, installation companies and system operators involved. The system interconnection together with the five rules of circuit dimensioning must also be taken into account. Some terms and definitions shall be described in this chapter for a better understanding of the issue. If you wish to obtain more detailed information regarding further applications, please contact your Siemens representative. Note: Proof of selectivity is required in IEC 60364-7-710 and DIN VDE 100-710 and -718. Full selectivity To maintain the supply reliability of power distribution systems, full selectivity is increasingly demanded. A power system is considered fully selective, if only the protective device upstream of the fault location disconnects from supply, as seen in the direction of energy flow (from the point of supply to the consumer). Note: Full selectivity always refers to the maximum, fault current Ik at the mounting location. Partial selectivity The corresponding device combination (upstream and downstream) is not selective up to a dead, 3-phase, i.e. maximum, fault current Ik max. In certain situations, partial selectivity (up to a particular short-circuit current) is sufficient. The probability of faults occurring and the effects of these on the load must then be considered for unfavorable scenarios. 2/14 Totally Integrated Power by Siemens Power System Definite-time-delayed t definite-time-delayed t 2 4 t = constant t = constant Inverse-timedelayed 2 inversetimedelayed Short-circuit tripping t = constant not delayed HV HRC fuse Medium-voltage circuit-breaker with overcurrent-time protection LV HRC fuse Low-voltage circuit-breaker with releases Adjustable characteristic curves or setting ranges Adjustable characteristic curves or setting ranges Fig. 2.3/1: Protective characteristic of LV HRC fuse and LV circuit-breaker with releases Fig. 2.3/2: Protective characteristic of HV HRC fuse and MV time-overcurrent protection 2.3.2 Protective Equipment Medium-voltage protection equipment HV HRC fuses High-voltage high-breaking-capacity (HV HRC) fuses can only be used for short-circuit protection. They do not provide overload protection. A minimum short-circuit current is, therefore, required for correct operation. HV HRC fuses restrict the peak shortcircuit current. The protective characteristic is determined by the selected rated current (Fig. 2.3/1). Medium-voltage circuit-breakers (IEC 62271-100/VDE 0671-100) Circuit-breakers can provide timeovercurrent protection (definite-time or inverse-time-delay), time-overcurrent protection with additional directional function, or differential protection. Distance protection is rarely used in the distribution systems described here. Protective characteristics Secondary relays, whose characteristic curves are also determined by the actual current transformation ratio, are normally used as protective devices in medium-voltage systems. Static digital protection devices are also being used to an increasing extent. Low-voltage protective devices* Low-voltage high-rupturingcapacity fuses Low-voltage high-rupturing-capacity (LV HRC) fuses have a high breaking capacity. They fuse quickly to restrict the short-circuit current to the utmost degree. The protective characteristic is determined by the selected utilization category of the LV HRC fuse (e. g. full-range fuse for overload and shortcircuit protection, or back-up fuse for short-circuit protection only) and the rated current (Fig. 2.3/2). Low-voltage circuit-breakers (IEC 60947-2 / VDE 660-101) Basically, circuit-breakers for power distribution systems are distinguished according to their type design (open or compact design), mounting type (fixed mounting, plug-in, withdrawable), rated current (maximum design current of the switch), method of operation: currentlimiting (MCCB – molded-case circuit-breaker), or non-currentlimiting (ACB – air circuit-breaker) protective functions (see releases), communication capability (capability to transmit data to and from the switch), utilization category (A or B, see IEC 60947-2). * For descriptions and modes of operation of lowvoltage protection devices, controlgear and switchgear, please also refer to the 4th edition of the Siemens AG handbook “Switching, Protection and Distribution in Low-Voltage Networks”, published by Publicis, Erlangen, 1997. 2/15 2 Releases / protective functions The protective function of the circuitbreaker in the power distribution system is determined by the selection of the appropriate release. Releases can be divided into thermo-magnetic releases (previously also called electromechanical releases) and electronic tripping units (ETU). Overload protection Designation: “L” or earlier “a” (“L” for long-time delay). Depending on the type of release, inverse-time-delay overload releases are also available with optional characteristic curves. Protection of neutral conductor Designation: N (neutral) Inverse-time-delay overload releases for neutral conductors are available in a 50% or 100% ratio of the overload release. Short-circuit protection, instantaneous Designation: I (instantaneous), previously also called “n” release. Example: solenoid release. Depending on the application, I-releases are also offered with a fixed, adjustable or OFF function. Short-circuit protection, with delay Designation: “S” (short-time delay), previously also “z” release. For a temporal adjustment of protective functions in series connections. Besides the standard curves and settings, there are also optional functions for special applications. – Definite-time-delay overcurrent releases: For this “standard S-function,” the desired delay time (tsd) is set to a definite value when a set current value (limit-value Isd) is exceeded (definite time; similar to the DMT function in medium voltage) – Inverse-time-delay overcurrent release: For this optional S-function applies I2t constant. This function is generally used to ensure a higher degree of selectivity (inverse time; similar to the inverse-time-delay function in medium voltage) Ground fault protection Designation: “G” (ground fault), previously also called “g” release. Besides the standard function (definite-time), there is also an optional function (I2t inverse-time delay). Fault current protection Designation: RCD (= residual current device), previously also called “DI.” To detect differential fault currents up to 3 A, similar to the RCCB function for the protection of persons (up to 500 mA). Electronic releases also permit new tripping criteria which are not possible with electromechanical releases. Protective characteristics The protective characteristic curve is determined by the rated circuit-breaker current as well as the setting and the operating values of the releases. Low-voltage miniature circuitbreakers (MCB) IEC 608981/VDE 0641-11 Miniature circuit-breakers are distinguished according to their method of operation, showing a high current-limiting, or low current-limiting capacity. Their protective functions are determined by electromechanical releases: Overload protection by means of inverse-time-delayed overload releases, e.g. bimetallic releases Short-circuit protection by means of instantaneous overload releases, e.g. solenoid releases 2.3.3 Low-Voltage Protective Switchgear Assemblies With series-connected distribution boards, it is possible to arrange the following protective devices in series (relative to the direction of power flow): Fuse with downstream fuse Circuit-breaker with downstream miniature circuit-breaker Circuit-breaker with downstream fuse Fuse with downstream circuitbreaker Fuse with downstream miniature circuit-breaker Several parallel feeding systems with or without coupler units with downstream circuit-breaker or downstream fuse Current selectivity must be verified in the case of meshed LV systems. The high- and low-voltage protection for the transformers feeding power to the LV system must be harmonized and matched to ensure protection of the secondary power system. Appropriate checks must be carried out to determine the effects on the primary MV system. In MV systems, HV HRC fuses are normally installed upstream of the transformers in the LV feeding system only. With the upstream circuitbreakers, only time-overcurrent protection devices with different characteristics are usually connected in series. Differential protection does not affect, or only slightly influences the grading of the other protective devices. 2/16 Totally Integrated Power by Siemens Power System 2.3.4 Selectivity Criteria In addition to factors such as rated current and rated switching capacity, another criterion to be considered is selectivity. Selectivity is important because it ensures optimum supply reliability. The following criteria can be applied for selective operation of series-connected protection devices: Time difference for clearance (time grading) Current difference for operating values (current grading) Combination of time and current grading (inverse-time grading) Power direction (directional protection), impedance (distance protection) and current difference (differential protection) are also used. Requirements for selective behavior of protective devices Protective devices can only act selectively if both the highest and the lowest short-circuit currents for the relevant system points are known at the project planning stage. As a result: The highest short-circuit current determines the required rated short-circuit switching capacity Icu/Ics of the circuit-breaker. Criterion: Icu or Ics > Ik max The lowest short-circuit current is important for setting the shortcircuit release; the operating value of this release must be less than the lowest short-circuit current at the end of the line to be protected, since only this setting of Isd or Ii guarantees that the overcurrent release can fulfill its operator and system protection functions. Attention When using these settings, permissible setting tolerances of ± 20%, or the tolerance specifications given by the manufacturer must be observed! Criterion: Isd or Ii ≤ Ik min – 20% The requirement that defined tripping conditions be observed determines the maximum conductor lengths or their cross sections. Selective current grading is only possible if the short-circuit currents are known. In addition to current grading, partial selectivity can be achieved using combinations of carefully matched protective devices. In addition to current grading, partial selectivity can be achieved using combinations of carefully matched protective devices. With feeding into LV power systems, the single-phase fault current will be greater than the three-phase fault current if transformers with the Dy connection are used. The single-phase short-circuit current will be the lowest fault current if the damping zero phase-sequence impedance of the LV cable is active. With large installations, it is advisable to determine all short-circuit currents using a special computer program. Here, our SIMARIS design® planning and calculation software comes as the optimum solution. Grading the operating currents with time grading Grading of the operating currents is also taken into consideration with time grading, i.e. the operating value of the overcurrent release of the upstream circuit-breaker must be at least 1.5 times the operating value of the downstream circuit-breaker. Tolerances of operating currents in definite-time-delay overcurrent Sreleases (±20%) are thus compensated. When the manufacturer speci- fies narrower tolerances, this factor is reduced accordingly. Plotting the tripping characteristics of the graded protective devices in a grading diagram will help to verify and visualize selectivity. 2.3.5 Preparing CurrentTime Diagrams (Grading Diagrams) When characteristic tripping curves are entered on log-log graph paper, the following must be observed: To ensure positive selectivity, the tripping curves must neither cross nor touch. With electronic inverse-time-delay (long-time delay) overcurrent releases, there is only one tripping curve, as it is not affected by preloading. The selected characteristic curve must, therefore, be suitable for the motor or transformer at operating temperature. With mechanical (thermal) inversetime-delay overload releases (L), the characteristic curves shown in the manufacturer catalog apply to cold releases. The opening times to are reduced by up to 25% at normal operating temperatures. Tolerance range of tripping curves The tripping curves of circuit-breakers given in the manufacturer catalogs are usually only average values and must be extended to include tolerance ranges (explicitly shown in Fig. 3/4, 3/20 and 3/24 only). With overcurrent releases – instantaneous (I) and definite-time delayed releases (S) – the tolerance may be ±20% of the current setting (according to IEC 60947-2 / VDE 0660 Part 101). 2/17 2 Significant tripping times For the sake of clarity, only the delay time (td) is plotted for circuitbreakers with definite-time-delay overcurrent releases (S), and only the opening time (to) for circuit-breakers with instantaneous overcurrent releases (I). Grading principle Delay times and operating currents are graded in the opposite direction to the flow of power, starting with the final circuit: without fuses, for the load breaker with the highest current setting of the overcurrent release, with fuses, for the fused outgoing circuit from the busbars with the highest rated fuse-link current. Circuit-breakers are preferred to fuses in cases where fuse links with high rated currents do not provide selectivity vis-à-vis the definite-time-delay overcurrent release (S) of the transformer feeder circuit-breaker, or only with very long delay times tsd (400 to 500 ms). Furthermore, circuit-breakers are used where high system availability is required, as they help to clear faults faster and the circuitbreakers’ releases are not subject to aging – especially with consumers with very long feeding distances. Procedure with two or more voltage levels In the case of selectivity involving two or more voltage levels (Fig. 2.7/2ff.), all currents and tripping curves on the high-voltage side are converted and referred to the low-voltage side on the basis of the transformer’s transformation ratio. Tools for preparing grading diagrams Standard forms with paired current values for commonly used voltages, 120 100 40 t 20 min 10 4 2 1 20 10 4 2 1 400 200 100 ms 40 20 10 2 101 102 Q1 Q2 k1 k2 L (cold) s S t st 150 ms t sd 180 ms t i < 30 ms 2 3 4 6 2 3 4 6 103 2 3 4 6 10 4 2 3 4 6 105 Current (r.m.s. value) Fig. 2.3/3: Grading diagram with tripping curves of the circuit-breakers Q1 and Q2 e. g. 20/0.4 kV, 10/0.4 kV, 13.8/ 0.4 kV, etc. Templates for plotting the tripping characteristics Fig. 2.3/3 shows a hand-drawn grading diagram with tripping curves for two series-connected circuit-breakers, not taking into account tolerances. When the SIMARIS design planning software is used, a manual preparation of grading diagrams is no longer necessary. Medium-voltage time grading Tripping command and grading time The following must be observed when determining the grading time tgt on the medium-voltage side: Once the protective device has been energized (Fig. 2.3/4), the set time must elapse, before the device issues the tripping command to the shunt or undervoltage release of the circuitbreaker (command time tk). The release causes the circuit-breaker to open. The short-circuit current is interrupted when the arc has been extinguished. Only then does the protection system revert to the normal (rest) position (release time). The grading time tst between successive protective devices must be greater than the sum of the total disconnection time tg of the breaker and the release time of the protection system. Since response time tolerances, which depend on a number of factors, have to be expected for the protective devices (including circuit-breakers), a safety margin is incorporated in the grading time. Whereas grading times tst of less than 400 to 300 ms are not possible with 2/18 Totally Integrated Power by Siemens Power System protective devices with mechanical releases, electronic releases have grading times of 300 ms, and digital releases used with modern vacuum circuit-breakers even provide grading times of only 250 or 200 ms. Low-voltage time grading Grading and delay times Only the grading time tst and delay time tsd are relevant for time grading between several series-connected circuit-breakers or in conjunction with LV HRC fuses. Proven grading times tst Series-connected circuit-breakers: Those so-called “proven grading times” are guiding values or rules of thumb. Precise information must be obtained from the equipment manufacturers. Grading between two circuit-breakers with electronic overcurrent releases should be about 70-80 ms Grading between two circuit-breakers with different release types (ETU and TM) should be about 100 ms For circuit-breakers with ZSI (zoneselective interlocking, i.e. shorttime grading control) the grading distance of the unblocked release has been defined as 50 ms. If the release is blocked, the switch trips within the set time tsd. Irrespective of the type of S-release (mechanical or electronic), a grading time of 70 ms to 100 ms is necessary between a circuit-breaker and a downstream LV HRC fuse. Back-up protection According to the Technical Supply Conditions of the supply network operators (see ”Electrical Installations Handbook”), miniature circuit-breakers must be fitted with back-up fuses with a rated current of 100 A (max.) Current I Shortcircuit current Operating current Load current Time setting of overlaid protection Time setting of Grading time t st protective device Command time t k Scatter band of protective tripping Scatter band Scatter band of circuitof protective breaker tripping Disconnection time of circuitbreaker Total disconnection time t g of circuit-breaker Fig. 2.3/4: Time grading in medium-voltage switchgear t Release time Safety time to prevent any damage being caused by short-circuit currents. The DIN VDE and IEC standards also permit a switching device to be protected by one of the upstream protective devices with an adequate rated short-circuit switching capacity if both the branch circuit and the downstream protective device are also protected. Further information on low-voltage switchgear and protective devices Siemens AG (Ed.), Switching, Protection and Distribution in Low-Voltage Networks, 4th ed., published by Publicis , Erlangen, 1997 Seip, Günther (Ed.), Electrical Installations Handbook, published by Publicis, Erlangen, 2000. 2/19 2 2.4 Protective Equipment for LowVoltage Power Systems Overcurrent protection devices must be used to protect lines and cables against overheating which may result from operational overloads or dead short circuits.* The protective switching devices and safety systems dealt with in this chapter are further described in Chapter 5. Tables 2.4/1 and 2.4/2 provide an overview of the protection equipment for LV systems. The protection equipment in the MV system of transformer branches has also been listed in Table 2.4/2. 2.4.1 Circuit-Breakers with Protective Functions Protective functions of LV circuitbreakers Circuit-breakers are used, first and foremost, for overload and shortcircuit protection. In order to increase their protective functions, they can also be equipped with additional releases, e.g. for disconnection on undervoltage, or with supplementary modules for detecting fault/residual currents (also see Chapter 6). Circuit-breakers are distinguished according to their protective function: Circuit-breakers for system protection acc. to IEC 60947-2 / DIN VDE 0660-101 Circuit-breakers for motor protection acc. to IEC 60947-2 / DIN VDE 0660-101 Circuit-breakers used in motor starters acc. to IEC 60947-4-2 / DIN VDE 0660-102 Miniature circuit-breakers for cable and line protection acc. to EN 60898/ IEC 60898 / DIN VDE 0641-11 Zero-current interrupters / current limiters Depending on their method of operation, circuit-breakers are available as: Zero-current interrupters Current limiters (fuse-type current limiting) When configuring selective distribution boards, zero-current interrupters are more suitable as upstream protection devices and current limiters as downstream protection devices. Overload and overcurrent protection Table 2.4/3 provides an overview of releases and relays in LV circuitbreakers. * cf. Seip, Günther G. (Ed.): Electrical Installations Handbook, 4th edition, Publicis, Erlangen, 2000, Section 1.7 Overcurrent protection devices Standard Overload protection × × × – Short-circuit protection × × × × Line-protection fuses, gL Miniature circuit-breakers Circuit-breakers w. overload and overcurrent releases Switchgear fuses, aM IEC 60269/DIN VDE 0636 IEC 60898/DIN VDE 0641-11 IEC 60947-2/DIN VDE 0660-101 IEC 60269/DIN VDE 0636 Switchgear assembly consisting of line-side fuse in utilization category gL or aM and contactor w. overload relay or starter circuit-breaker and contactor w. overload relay IEC 60269/DIN VDE 0636 IEC 60947-4-1/DIN VDE 0660-102 – × – × × – × – IEC 60947-2/DIN VDE 0660-101 IEC 60947-4-1/DIN VDE 0660-102 × Protection ensured – protection not ensured Table 2.4/1: Overview of overcurrent protection devices for lines and cables together with their protection range 2/20 Totally Integrated Power by Siemens Power System MV protection devices applied Switch-disconnectors, HV HRC fuses Circuit-breaker, current transformer, overcurrenttime protection Tie breakers adequate Circuit-breaker LV Circuit-breakers or LV HRC fuses low Expense Medium-voltage side high Transformers with temp. detectors or thermal protection Low-voltage side with series connections of various protective devices in radial networks, and parallel connections of LV HRC fuses in interconnected grids Typically single and parallel operation HV HRC MV LV optionally ≤ 630 A I> I> I> I >> > MV LV Typically single and parallel operation NH ≤ 50 A, ≤ 100 A HV HRC fuse or LV HRC fuse > >> Independent two-zone definite-time overcurrent-time protection, > and >>, to current transformer Reactive-power control unit Circuit-breaker Withdrawable circuit-breaker (with isolating point) Switch-disconnector Contactor Overload relay Table 2.4/2: Overview of protection grading schemes for transformer branch and LV branch circuits Overcurrent releases Instantaneous electromagnetic overcurrent releases have either fixed or adjustable settings, whereas the electronic overcurrent releases used in Siemens circuit-breakers all have adjustable settings. Modules The overcurrent releases can be integrated in the circuit-breaker or supplied as separate modules for retrofitting or replacement. For possible exceptions, please refer to the manufacturers' specifications. Overload releases Mechanical (thermal) inverse-timedelay overload releases (L-releases) are not always suitable for networks with a high harmonic content. Circuitbreakers with electronic overload releases must be used in such cases. Short-circuit protection with S-releases If circuit-breakers with definite (short) time-delay overcurrent releases (S) are used for time-graded short-circuit protection, it should be noted that the circuit-breakers are designed for a specific maximum permissible thermal and dynamic load. If the time delay causes this load limit to be exceeded in the event of a short circuit, an I-release must also be used to ensure 2/21 2 that the circuit-breaker is opened instantaneously in case of very high short-circuit currents. The information supplied by the manufacturer should be consulted when selecting an appropriate release. Reclosing lockout after short-circuit tripping Some circuit-breakers can be fitted with a mechanical and/or electrical reclosing lockout which prevents reclosing to the short circuit after tripping on this fault. The circuitbreaker can only be closed again after the fault has been eliminated and the lockout has been reset manually. Fault-current/residual-current protection Fault-current protection devices have acquired a position of vital importance in safety engineering all over the world, due to the high level of protection they provide (protection of human life and property) and their extended scope of protection features (alternating and pulsating current sensitivity). Apart from residual-current-operated circuit-breakers, miniature circuitbreaker assemblies, e. g. miniature circuit-breakers with fault-current tripping, are being used to an increasing extent for commercial and industrial applications. Miniature circuit-breakers (MCB) with fault-current tripping These circuit-breaker assemblies are available as compact factory-built devices or may be assembled from a miniature circuit-breaker as the basic device and an add-on module. Miniature circuit-breakers with fault-current/residual-current tripping The assembly comprising a circuitbreaker and add-on module has established itself for circuit-breakers Protective function Code Delay type of the release Symbols acc. to EN 60617 / DIN 40713 Schematic symbol or Graphic symbol Overload protection L Stromabhängig verzögert Selective shortS1) circuit protection (with delay) definite-timedelayed by timer Zeitglied or with I2-dependent delay definite-timedelayed or with I2-dependent delay > II> Fault-current/ G1) residual-current/ ground-fault protection (RCD) I Short-circuit protection (instantaneous) 1) I instantaneous > I>> For SENTRON 3WL and SENTRON 3VL circuit-breakers also with “zone-selective interlocking” (ZSI) Combinations of releases will only be referred to by their codes as L-, S- and I-releases etc. Table 2.4/3: Symbols for releases according to protective function with rated currents In of up to 400 A and fault-current/residual-current tripping. Technical features The add-on module for residualcurrent tripping used in system protection applications includes such the technical features as: Rated residual current I∆n adjustable in steps, e.g. 30 mA/ 100 mA/ 300 mA/ 1,000 mA/ 3,000 mA Tripping time ta adjustable in steps, e.g. instantaneous 60 ms/ 100 ms/ 250 ms/ 500 ms/ 1,000 ms Operation depends on the system voltage Sensitivity: tripping with alternating and pulsating DC fault currents ( ) Reset button ”R” for resetting after residual-current tripping Test button ”T” for testing the circuit-breaker assembly Status display for the present leakage/residual current I∆ in the downstream circuit, e. g. by means of colored LEDs: – green: I∆ ≤ 0,25 I∆n – yellow: 0,25 I∆n < I∆ ≤ 0,5 I∆n 2/22 Totally Integrated Power by Siemens Power System – red: IA > I∆ > 0.5 I∆n IA = Tripping current of additional residualcurrent module Disconnection of the electronics’ overvoltage protection prior to insulation measurements in the installation ”Remote tripping” ”Auxiliary switch (AS)” Interface to bus systems The circuit-breaker assemblies can be equipped to bus systems using appropriate interfaces, to enable the exchange of information and interaction with other components in the electrical installation. Circuit-breaker assemblies sensitive to universal current Miniature circuit-breaker assemblies, which are sensitive to universal current (AC/DC-sensitive), are required for industrial applications for electrical installations in which smooth DC fault currents or currents with a low residual ripple occur in the event of a fault. Standards The standards IEC 60947-2 / DIN VDE 0660-101 apply to circuitbreakers with add-on fault-current or residual-current modules. Selection criteria for circuitbreakers When selecting the appropriate circuit-breakers for system protection, special attention must be paid to the following characteristics: Type of circuit-breaker and its releases according to the respective protective function and tasks Rated voltages Short-circuit strength Icu/ Ics and rated short-circuit making (Icm) and breaking capacity (Icn) Rated and maximum load currents The system voltage and system frequency are crucial factors for selecting the circuit-breakers according to rated insulation voltage Ui and rated operating voltage Ue Rated insulation voltage Ui The rated insulation voltage Ui is the standardized voltage value for which the insulation of the circuit-breakers and their associated components is rated in accordance with HD 625 / IEC 60664 / DIN VDE 0110, Insulation Group C. Rated operating voltage Ue The rated operating voltage Ue of a circuit-breaker is the voltage value to which the rated short-circuit making and breaking capacities and the shortcircuit performance category refer. Short-circuit current The maximum short-circuit current at the mounting location is a crucial factor for selecting the circuit-breakers according to short-circuit strength Icu/ Ics, as well as rated short-circuit making (Icm) and breaking capacities (Icn). Dynamic short-circuit strength The dynamic short-circuit strength is the maximum asymmetric short-circuit current. It is the highest permissible instantaneous value of the prospective short-circuit current along the conducting path with the highest load. Thermal short-circuit strength (1-s current) The permissible thermal short-circuit strength is referred to as the rated short-time current Icw. It is the maximum current which the breaker is capable of withstanding for a defined time without being damaged. Generally, the Icw current refers to 1 s. Other time values > 1 s can be converted assuming Icn = constant. Rated switching capacity The rated switching capacity of the circuit-breakers is specified as the rated short-circuit making capacity Icm and rated short-circuit breaking capacity Icn. Rated short-circuit making capacity Icm The rated short-circuit making capacity Icm is the short-circuit current which the circuit-breaker is capable of making at the rated operating voltage +10%, rated frequency and a specified power factor. It is expressed as the maximum peak value of the prospective short-circuit current, and is at least equal to the rated short-circuit breaking capacity Icn, multiplied by the factor n specified in Table 2.4/4. Rated short-circuit breaking capacity Icn The rated short-circuit breaking capacity Icn is the short-circuit current which the circuit-breaker is capable of breaking at the rated operating voltage +10%, rated frequency and a specified power factor cos ϕ. It is expressed as the r.m.s. value of the alternating current component. Switching capacity category Switching capacity categories, which specify how often a circuit-breaker can switch its rated making and breaking current as well as the condition of the breaker after the specified switching cycle, are defined for circuit-breakers in IEC 60947/ DIN VDE 0660 and in accordance with IEC 157-1 (Table 2.4/5). The rated short-circuit breaking capacity Icn is based on the test sequence O-t-CO-tCO. The rated service short-circuit breaking capacity Ics can also be specified on the basis of the shortened switching sequence O-t-CO (see Table 2.4/5 for explanation of O, t, and C). 2/23 2 Short-circuit breaking capacity Icn (r.m.s. value) [kA] 4.5 6 10 20 50 100 kA, 690 V f (Ir Ue type1)) f (Ir Ik) none yes extra expense required2) no extra expense required3) extra expense required4) no f (Ir Ik Ue type1)) f (Ir Ik Ue type1)) no yes yes yes yes yes no no yes no no expense yes5) yes f (condition) f (condition) (no. of switching operations f and condition) extra expense required if the same make very good very good good good sufficient not possible good good 2) Circuits and control units can be designed with or without fuses. Circuits with fuses (fuse-protected design) The standard design with fuses intended for system protection includes fuse-switch-disconnectors switch-disconnectors with fuses, and fuse and base arrangements (Table 2.4/10). The feeder circuit-breaker provides Type of construction may be: arc quenching method, short-circuit strength owing to specific resistance, constructive design For example, by means of shockhazard protected fuse-switch-discon- 3) 4) 5) nectors with high-speed closing By means of fuse monitoring and dedicated circuit-breaker By means of fuse monitoring Standardized Table 2.4/8: Comparison between the protective characteristics of fuses and circuit-breakers overload protection and selective short-circuit protection for the transformer and distribution board. Siemens circuit-breakers SENTRON WL are ideal for this purpose. Transformers featuring lower output ratings, and/or if selectivity is not required, may also be protected by a moldedcase circuit-breaker, type SENTRON 3VL. The fuse, providing system protection, protects the lines to the subdistribution board against overloads and short circuits as well as nonmotor consumers. The switchgear 2/32 Totally Integrated Power by Siemens Power System Equipment to be protected and switching frequency Protective devices with fuses Fuse Circuit-breaker Contactor Overload protection Thermistormotor protection M 3~ M 3~ M + M + M + M + Overload protection – Line – Motors (with thermally critical stators) – Motors (with thermally critical rotors) Short-circuit protection – Line – Motor Switching frequency ++ ++1) ++1) ++ ++ ++ + ++ + + ++ + ++ ++ ++ ++ ++ ++ ++ ++ – ++ ++ ++ ++ ++ – ++ ++ ++ ++ ++ – ++ ++ ++ Equipment to be protected and switching frequency Protective devices without fuses – Circuit-breaker Contactor Overload protection Thermistor-/ SIMOCODE motor protection M 3~ M 3~ M + M + M 3~ M +ϑ Overload protection – Line – Motors (with thermally critical stators) – Motors (with thermally critical rotors) Short-circuit protection – Line – Motor Switching frequency ++ ++1) ++1) ++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++1) ++1) + ++ ++ ++ ++ + ++ ++ + ++ ++ + ++ ++ + ++ ++ – ++ ++ – 1) Protection with little restriction in case of phase failure ++ Very good + Good – Poor Table 2.4/9: Comparison between the protective characteristics of different switchgear assemblies (schematic circuit diagrams) 2/33 2 No. Type of circuitbreaker Version Rated shortcircuit breaking capacity Icn Type of release or relay L S I AdFixed AdFixed Adjustsetting justsetting justable able able Fuse Tripping curve ↔ Icn > 100 kA Adjustable ↔ release Feeder circuit-breaker 1 Circuit-breaker 3WL for system protection with selectivity requirement ≥ Ik1 × – × – × – t k1 cn 1 k1 Distribution circuit-breaker 2 Fuse for system protection 3NA ≥ Ik2 – – – – – × t k2 cn 2 k2 k2 Load circuit-breaker k2 3 5 4 3 k3 Fuse and circuitbreaker for motor protection 3NA 3RV1 ≥ Ik3 ≤ Ik3 – × – – – – – × – – × – cn t k3 4 k3 k3 V M 3~ M 3~ Fuse and direct-online starter for motor protection Fuse for power consumer 3NA 3RB 3RT ≥ Ik3 – × – – – – – – – – – – – – – × – – cn t k3 5 3NA ≥ Ik3 – – – – – × t k3 cn Table 2.4/10: Distribution boards combining fuses and circuit-breakers assemblies comprising fuse and circuit-breaker, which provide motor protection, as well as fuses, contactor, and overload relay protect the motor feeder cable and the motor against overloads and short circuits. Circuits without fuses (circuitbreaker protected design) In the case of distribution boards without fuses (Table 2.4/11), shortcircuit protection is provided by circuit-breakers for system protection. In the case of load circuit-breakers, short-circuit protection is provided by 2/34 Totally Integrated Power by Siemens Power System No. Type of circuitbreaker Version Rated shortcircuit breaking capacity Icn Type of release or relay L S I AdFixed AdFixed justsetjustsetable ting able ting Tripping characteristic Adjustable ↔ ↔ Adjustable release Feeder circuit-breaker 1 1 k1 Circuit-breaker 3WL for system protection without selectivity requirement ≥ Ik1 × – × – × t k1 cn Distribution circuit-breaker 3 2 k2 k2 2* Circuit-breakers 3VL for system protection without selectivity requirement 3 Circuit-breaker 3WL for system 3VL protection with selectivity requirement ≥ Ik2 – × × × – – – – – × × – – – × cn t k2 * 3 Varianten möglich, Variante 3 bildlich dargestellt ≥ Ik2 × – × – × t k2 cn 4 5 Load circuit-breaker 4 k3 k3 M 3~ M 3~ Circuitbreaker for motor protection 3RV1 ≥ Ik3 × – – × – t k3 cn 5 Circuit-breaker 3RA and direct-online starter for motor protection ≥ Ik3 × – – × − t k3 cn Table 2.4/11: Power distribution using circuit-breaker without fuses circuit-breakers for motor protection only or for starter assemblies together with the contactor. The protection ranges of the switchgear assemblies comprising circuit-breaker, contactor and overload relay have already been dealt with in this chapter. Further technical data can be found in the literature supplied by the manufacturer. 2/35 2 2.4.4 Miniature CircuitBreakers (MCBs) Task Miniature circuit-breakers (MCBs) are mainly designed for the protection of cables and lines against overload and short circuit, thus ensuring the protection of electrical equipment against excessively high heating in compliance with the relevant standards, e.g. IEC 60364-4-43 / DIN VDE 0100-430. Under certain conditions, MCBs in a TN system also provide protection against electrical stroke at excessively high contact voltage due to wrong insulation, e.g. according to IEC 364-4-41 / DIN VDE 0100-410. Use Miniature circuit-breakers are used in all distribution networks, both for commercial buildings and industrial buildings. Due to a wide range of versions and accessories (e.g. auxiliary contacts, fault signal contacts, open-circuit shunt releases), they are able to meet the various requirements of the most diverse areas of application. Tripping characteristics Four tripping characteristics A, B, C and D are available for any kind of application; they correspond to the equipment being connected in the circuit to be protected. Tripping characteristic A is particularly suitable for the protection of transducers in measuring circuits, for electronically controlled circuits and where disconnection within 0.4 s is required in accordance with IEC 60364-4-41/ DIN VDE 0100-410. Tripping characteristic B is the standard characteristic for walloutlet circuits in residential and 1st condition b ≤ n≤ z b 2st condition 2 ≤ 1.45· z z Ib Operating current to be expected, i.e. current drawn by the power consumer under normal operating conditions Permissible continuous load current for a conductor, when the maximum continuously applied temperature of the insulation is not exceeded n 2 1.45· Iz z Time t 1 2 3 1.45·Iz Maximum permissible overload current of limited duration, at which a sudden, temporary exceeding of the maximum continuously applied temperature has not yet resulted in a safetyrelevant reduction of insulation properties In Rated current, i.e. the current the miniature circuitbreaker has been laid out for and other rating parameters refer to (setting value) Conventional non-tripping current, i.e. the current which does not result in disconnection under defined conditions Conventional tripping current, i.e. the current which is broken under defined conditions (In ≤ 63 A) within one hour Tolerance margins Withstand current of the instantaneous electromagnetic overcurrent release (short-circuit release) Tripping current of the instantaneous electromagnetic overcurrent release (short-circuit release) 3 I1 I2 I3 4 5 I4 I5 Fig. 2.4/11: Schematic reference value diagram of lines and their protective device commercial buildings. Tripping characteristic C is advantageous wherever equipment with higher inrush currents, e.g. luminaires and motors, is used. Tripping characteristic D is adapted to highly pulse-generating equipment, such as transformers, solenoid valves or capacitors. Operating method Miniature circuit-breakers are protective switches for manual operation, including overcurrent remote tripping (via thermal overcurrent instantaneous release). Multi-pole devices are coupled mechanically at the outside via handles and simultaneously inside via their releases. 2/36 Totally Integrated Power by Siemens Power System Standards The international basic standard is IEC 60898. The German national standard DIN VDE 0641-11 is based upon it. Device sizes are described in DIN 43880. For the protection against personal injury, the relevant standards, e.g. concerning fault clearing requirements in compliance with IEC 60364-4-41 / DIN VDE 0100-410 have to be met. Versions MCBs are available in many different versions: 1-pole, 2-pole, 3-pole, 4-pole and with connected neutral 1-pole+N and 3-pole+N. Corresponding to the preferred series according to IEC 60898 and DIN 43880, MCBs are allocated the following rated currents: Devices with 55 mm in depth 0.3 A to 63 A Devices with 70 mm depth 0.3 A to 125 A Depending on the device type, an auxiliary switch (AS), fault-signal contact (FC), open-circuit shunt release (ST), undervoltage release (UR) or residual-current-operated circuit-breaker (RCCB module) can be retrofitted. By fitting an RCCB module to an MCB, an RCBO assembly is created. As a complete system, it can be used for line protection as well as for protection against electrically ignited fires and personal injury in the event of direct or indirect contact voltages. Auxiliary switches (AS) signal the switching state of the MCB and indicate whether it has been switched off manually or automatically. Faultsignal contacts (FC) indicate tripping of the MCB due to overload or short circuit. Open-circuit shunt releases (ST) are suitable for remote switching of MCBs. Undervoltage releases (UR) protect devices connected in the circuit against impacts of insufficiently low supply voltage. By connecting the AS and the FC to an instabus KNX/EIB binary input, the signals may also be read into an instabus KNX/EIBEIB system (e.g. GAMMA instabus). When using an instabus KNX/EIB binary output, the MCB which is tripped via the opencircuit shunt release (AA) can also be remotely tripped via instabus KNX/EIB. Depending on the device type, miniature circuit-breakers by Siemens have the following features: Excellent current-limiting and selectivity characteristics Identical terminals on both sides for optional feeding from the top or bottom Installation and dismantling without the use of tools Rapid and easy removal from the system Terminals safe-to-touch by fingers or the back of the hand according to VDE 0106-100 Combined terminals for simultaneous connection of busbars and feeder cables Main switch characteristics according to IEC 60204 / VDE 0113 Separate switch position indicator Alternating-current type MCBs are suitable for all AC and three-phase networks up to a voltage of 240/ 415 V and all DC networks up to 60 V (1-pole) and 120 V (2-pole). The MCB voltage rating is 230/400 V AC. AC/DC-current type MCBs may also be used for 220 V DC (1-pole) and 440 V DC (2-pole). In order to avoid damaging of the conductor insulation in case of faults, temperatures must not rise above certain values. For PVC insulation, these values are 70 °C permanently or 160 °C for a maximum of 5 s (short circuit). For line-overcurrent protection, the MCBs usually have two independent releases. In the event of overload, a bimetal contact opens inverse-timedelayed corresponding to the current value. If a certain threshold is exceeded in the event of a short circuit, however, an electro-magnetic overcurrent release instantaneously trips without delay. The tripping range (time-current threshold zone) of the MCB according IEC 60898 / DIN VDE 0641-11 is defined via parameters I1 to I5 (Fig. 2.4/12). The line parameters Ib and Iz (see Fig. 2.4/11) are related to it. When the IEC 60898 was published, new characteristics B, C and D were defined internationally. They were also adopted in DIN VDE 0641-11. The new tripping requirements of MCBs facilitate their assignment to conductor cross sections. In the relevant standards, e.g. IEC 60364-4-43 / DIN/VDE 0100-430, the following conditions are listed: Rated current rule Ib ≤ In ≤ Iz Tripping current rule I2 ≤ 1.45 x Iz As the second condition is automatically fulfilled with the new characteristic curves due the fact that these curves have been defined (Iz = In), the MCB merely needs to be selected according to the simplified criterion In ≤ Iz Resulting from this, a new allocation of rated currents for MCBs and con- 2/37 2 Rated cross section qn mm2 1.5 2.5 4 6 10 16 25 35 Rated MCB current In for protection of 2 conductors under load 3 conductors under load A A 16 25 32 40 63 80 100 125 16 20 32 40 50 63 80 100 Iz (line) Permissible continuous load current if 2 conductors under load 3 conductors under load A A 19.5 27 36 46 63 85 112 138 17.5 24 32 41 57 76 96 119 Table 2.4/12: MCB and conductor cross section matrix Example: flat-webbed cable, stranded cable, on or in the wall, installation type C*), at +30 ºC ambient temperature * Installation type C in compliance with IEC 60364-5-52 / DIN VDE 0298-4: cables are fixed in such a way that the spacing between them and the wall surface is less than 0.3 times the outer cable diameter. Minutes ductor cross sections can be given (see Table 2.4/12), related to an ambient temperature of +30 °C, as it is considered appropriate according to IEC 60364-4-43 / DIN VDE 0100-430, and in relation to the type of installation and accumulation of equipment. Siemens MCBs are available with the tripping characteristics B, C and D, bearing, among other things, the VDE mark based upon the CCA procedure (CENELEC Certification Agreement). Figure 2.4/12 represents all tripping characteristics. Due to the position of the tripping bands, the following features vary in intensity with a rising degree from curve A to D: Current pulse withstand strength, rising Permissible line and cable length for the protection of persons, decreasing Temperature impact The tripping characteristics are standard defined at an ambient temperature of +30 °C. At higher temperatures, the thermal tripping curve in Fig. 2.4/12 shifts to the left, and to the right at lower temperatures. This 300 Time t 1 2 MCB Tripping characteristics B, C, D acc. to IEC 60898 / DIN VDE 0641-11 1 (t > 1h) 2 (t < 1h) 60 A1) 1.13 x 1.45 x 2x 3x n n B n 1.13 x n C 1.13 x 5x 10 x n D 1.13 x 1.45 x 10 x 20 x n n 1) Meets n n n 1.45 x n 1.45 x n the requirements of IEC 60364-4-41/ DIN VDE 0100-410 10 4 (t > 0,1s) 5 (t < 0,1s) 3x 5x n n n n 3 1 10 5 Seconds Disconnection condition acc. to IEC 60364-4-41/ DIN VDE 0100-410 1 0.4 3 A B 5 4 4 4 C 5 4 D 5 5 0.1 0.01 1 2 3 4 6 8 10 20 30 40 60 80 100 n x Rated current Fig. 2.4/12: Time-current limit ranges of MCBs 2/38 Totally Integrated Power by Siemens Power System means that tripping becomes effective even with lower currents present (higher temperatures) or only with higher currents (lower temperatures). This has to be taken into account in particular for an installation in hot rooms, in encapsulated distribution boards where, owing to the currentinduced heat losses of the built-in devices, higher temperatures may prevail and for distribution boards installed outdoors. MCBs can be used at temperatures ranging from –25 °C to +55 °C. The relative humidity may be 95%. Resistance to climate Miniature circuit-breakers by Siemens are resistant to climate in compliance with IEC 68-2-30. They were successfully tested in six climatic cycles. Degree of protection As MCBs are mainly installed in distribution boards, their degree of protection must meet the requirements of the respective type of room. MCBs without an encapsulation can reach IP30 according to IEC 60529 / DIN VDE 0470-1 provided that they have adequate terminal covers. All MCBs are equipped with a snap-on fixing for rapid fitting on 35-mm wide standard mounting rails according to DIN EN 50022. Some versions may additionally be screwed on mounting plates. Installation Moreover, some type series are available with a rapid wiring system for manual handling without the use of tools, which even enables the removal of individual MCBs from the busbar system. Rated switching capacity Besides a reliable adherence to characteristic curves, an important performance feature of MCBs is their rated short-circuit breaking capacity. It is divided into short-circuit breaking capacity classes and indicates up to which level short-circuit currents can be broken according to IEC 60898/ DIN VDE 0641-11 (Table 2.4/13). Depending on their design, MCBs by Siemens have short-circuit breaking capacity ratings up to 25,000 A and VDE approval. Current-limiting classes As a selectivity indicator with regard to upstream fuses, miniature circuit- breakers with characteristic B and C up to 40 A are divided in to three current-limiting classes according to their current-limiting capability. For permissible let-through I2t values, please refer to the standards IEC 60898 / DIN VDE 0641-11. For reasons of selectivity, only Class 3 MCBs with a rated switching capacity of at least 6,000 A may be used in distribution boards connected downstream of the meter for residential and commercial buildings in compliance with the Technical Supply Conditions of German supply network operators. Devices must be labeled: Selectivity Selectivity means that only that protective device will trip in the event of a fault which is closest to the fault location in the course of the current path. This way the energy flow can be maintained in circuits which are connected in parallel. In the diagram in Fig. 2.4/13, the current curve in a disconnection process is shown schematically with regard to currentlimiting classes. Siemens MCBs of type B16 reduce the energy flow to much lower values than defined for currentlimiting class 3. Figure 2.4/13 shows the selectivity limits of MCBs with different currentlimiting classes as the intersection of the MCB tripping curve with the melting curve of the fuse. The highly effective current limitation of the MCB also affects the high current discrimination towards the upstream fuse. Curve B16 relates to 16 A Siemens breakers, tripping characteristic B. Standards IEC 60898 / DIN VDE 0641-11 Rated switching capacity classes 1,500 A 3,000 A 4,500 A 6,000 A 10,000 A 15,000 A 20,000 A 25,000 A Table 2.4/13: Rated switching capacity classes of MCBs 2/39 2 Transformer t [A 2 s] Permissible 2 t value of calbe 1,5 mm 2 1 2 3 B 16 DIAZED 50 A Fuse MCB [A] k 2 10 4 i i eff 3 B 16 2 1 Sine half-wave 10 3 10 -1 1 2 3 0 5 t 10 [ms] 3 6 10 0 3 k 6 10 1 [kA] Fig. 2.4/13: Selectivity of MCBs with current limiting classes as described and towards back-up fuses Curve B16 applies to 16 A Siemens breakers, tripping characteristic B. Back-up protection If the short-circuit current at the point where the MCB is installed exceeds its rated switching capacity, another short-circuit protecting device has to be connected upstream. Without affecting the operability of the breaker in such cases, the switching capacity of such an assembly will be increased up to 50 kA. In some countries, circuit-breakers rather than LV HRC fuses are connected upstream instead, which – depending on the type – reduces the combined switching capacity considerably. Although circuit-breakers have a high inherent rated breaking capacity, they do not switch sufficiently currentlimiting in the range of the MCB switching capacity limit (6 kA / 10 kA), so that they cannot provide much support. Therefore, miniature circuitbreakers with a rated current of 6 A to 32 A are only protected by an upstream circuit-breaker up to the defined rated switching capacity of the MCB (back-up protection). For further product information on MCBs please refer to the ET B1 Catalog ”BETA Low-Voltage Control Systems”, Order no. E86060-K8220-A101-A8 2/40 Totally Integrated Power by Siemens Power System 2.5 Selectivity in Low-Voltage Systems Proof of selectivity is required in IEC 60364-7-710 and DIN VDE 100-710 and -718. Full selectivity is achieved with two series-connected protective devices if, when a fault occurs after the downstream protection device, only the downstream device disconnects from supply. A distinction is made between two types of selectivity: Partial selectivity acc. to IEC 60947-2, VDE 660-101: Overcurrent discrimination of two series-connected overcurrent protection devices, where the load-side protective device takes over the full protection task up to a defined overcurrent level without the other protective device being active. Full selectivity acc. to IEC 60947-2, VDE 660-101: Overcurrent discrimination of two series-connected overcurrent protection devices, where the load-side protective device takes over the full protection task without the other protective device being active. Selectivity types Selective current breaking capacity by grading the instantaneous shortcircuit releases of Ii circuit-breakers with Ii characteristic. Time selectivity: Grading of the configurable tripping times (tsd in the S-part) of the shortcircuit releases. This applies to standard as well as to optional characteristic curves. Circuit-breaker with LSI characteristics: it is often required in main distribution boards and at transfer points using devices of different manufacturers. Dynamic/energy selectivity Selectivity based on the evaluation of the let-through energy of the downstream devices and the tripping energy of the upstream protective device. Determining the selectivity type According to IEC 60947-2, Appendix A, and VDE 660-101, the determination or verification of the desired type of selectivity is divided in two time ranges. Time range ≥ 100 ms: The time range above 100 ms can be analyzed by a comparison of characteristic curves in the L- or S-range, taking the tolerances, required protective settings, curve representation in identical scales etc. into account. Time range < 100 ms: The standard requires selectivity in this time range to be verified by testing. Due to the fact that the time and cost expense involved are very high, when different devices are used in the power distribution system, selectivity limits can often be obtained from renowned equipment manufacturers only. In practice, letthrough currents are therefore often compared to the operating or pickup currents or, the let-through currents of the protective devices are compared to each other. The prerequisite being that the relevant data is available from the equipment manufacturer and that it is analyzed thoroughly. Comparing characteristic curves Three diagram types can be used for comparing characteristic curves: Time-current diagram Let-through current diagram Let-through energy diagram Since these characteristic curves are compared over several orders of magnitude, they are usually plotted on log-log paper. All characteristic curves must – if not already specified by the manufacturer – be assigned a tolerance band to enable selectivity to be determined reliably. In the case of switchgear, IEC 60 947–2 / DIN VDE 0660–101 specify a tolerance of ± 20% for the instantaneous overcurrent release. The operating times, which are sometimes considerably shorter at normal operating temperatures, must be taken into consideration for electromechanical overload releases. Determination of the selectivity limit As a rule, all selectivity limits between two protective devices can be determined by carrying out measurements or tests. These measurements are virtually indispensable, particularly when assessing selectivity in the event of a short circuit, owing to the extremely rapid switching operations when current-limiting protection equipment is used. The measurements can, however, be very costly and complicated, which is why many manufacturers publish selectivity tables for their switchgear. The SIMARIS design software automatically takes all these criteria into account and selects suitable Siemens products. 2/41 2 2.5.1 Selectivity in Radial Systems Selectivity between seriesconnected fuses The feeding line and the outgoing circuits branching from the busbar of a distribution board carry different operating currents and, therefore, also have different cross sections. Consequently, they are usually protected by fuses with different rated currents, which ensure selectivity on account of their different operating behaviors. Selectivity between seriesconnected fuses with identical utilization categories When fuses of the same utilization category (e.g. gL or gG) are used, selectivity is ensured across the entire overcurrent range up to the rated switching capacity (absolute selectivity) if the rated currents differ by a factor of 1.6 or higher (Fig. 2.5/1). The Joulean heat values (I2t values) should be compared in case of high short-circuit currents. In the example shown, a 160 A LV HRC fuse would also have absolute selectivity with respect to a 100 A LV HRC fuse. Selectivity between seriesconnected circuit-breakers Selectivity can be achieved by grading the operating currents of instantaneous overcurrent releases (I-releases) (Fig. 2.5/2). Prerequisites for this are: Current grading with different short-circuit currents The short-circuit currents in the event of a short circuit at the respective locations of the circuit-breakers are sufficiently different. 200 A (160) k =1,300 [s] ts 100 A Size 00 A 1,4 50 A 50 A 100 A k= 200 A Size 1 1.37 s 0,03 1,300 A K1 101 a) Selective disconnection of short-circuit fault location K1 10 2 10 3 1.3 k 10 4 [A] b) Prearcing times at = 1,300 A Fig. 2.5/1: Selectivity between series-connected LV HRC fuses with identical utilization categories (example) Current grading with differently configured I-releases The rated currents and, therefore, the I-release values of the upstream and downstream circuit-breakers differ accordingly. 5-second breaking and line-protection conditions In compliance with the 5-second breaking condition specified in IEC 60364-4-41 / DIN VDE 0100-410 or the 5-second line-protection condition specified in IEC 60364-4-43 / DIN VDE 0100-430 (if line protection cannot be provided in any other way), the I-release must generally be set to 4,000 A so that even very small short circuits are cleared at the input terminals of the downstream circuitbreaker Q1 within the specified time. Only partial selectivity can be established by comparing characteristic curves for current grading, since the curve in the range < 100 ms – which is frequently, and quite rightly represented by broken lines – does not permit any conclusions with regard to selectivity owing to the complicated dynamic switching and tripping operations. Selectivity through circuit-breaker coordination (dynamic selectivity) With high-speed operations, e.g. in the event of a short circuit, and the interaction of series-connected protection devices, the dynamic processes in the circuit and in the electromechanical releases have a considerable effect on selectivity behavior, particularly if current limiters are used. Selectivity is also achieved if the downstream current-limiting protection device trips so quickly that, although the let-through current does momentarily exceed the operating value of the upstream protection device, the ”mechanically slow” 2/42 Totally Integrated Power by Siemens Power System [s] Sr = 400 kVA at 400 V, 50 Hz ukr = 4% r = 577 A k = 15 kA e Opening time t 10 4 102 min. 101 = 600 A (L-release) = 4,000 A (I-release) 10 2 10 0 L 10 1 L 10 3 I II Q2 k e = 10 kA II e 5.0 kA I 2.1 kA Q1 e = 60 A (L-release) = 720 A (I-release) 10 0 10-1 10-2 M 3~ 4 5 10 2 2 5 10 3 2 5 10 4 Current 2 5 [A] a) Block diagram b) Tripping curves L I Definite-time delayed overload release Instantaneous electromagnetic overcurrent release Q1 Circuit-breaker for motor protection (current-limiting) Q2 Circuit-breaker (zero-current interrupter) Fig. 2.5/2: Current selectivity for two series-connected circuit-breakers at different short-circuit current levels (example) release does not have time to trigger. The let-through current depends on the maximum asymmetrical shortcircuit current and current limiting characteristics. Selectivity limits of two seriesconnected circuit-breakers A maximum short-circuit value – the selectivity limit – up to which the downstream circuit-breaker can open more quickly and alone, i.e. selectively, can be determined for each switchgear assembly. The selectivity limit may be well above the operating value of the instantaneous overcurrent release in the upstream circuit-breaker (see Fig. 2.5/3). Irrespective of this, it is important to verify selectivity in the event of an overload by comparing the characteristic curves and by checking that tripping times are in accordance with the relevant regulations. Generally speaking, dynamic selectivity in a short circuit only provides partial selectivity. This may be sufficient (full selectivity) if the prospective maximum short-circuit current at the downstream protective device is lower than the established selectivity limit. With partial selectivity, which usually arises with current grading owing to the fault clearing condition (see Fig. 2.5/2), a consideration of dynamic selectivity provides a good possibility for verifying full selectivity without having to use switchgear with short-time-delay overcurrent releases. Selectivity by means of short-timedelay overcurrent releases (time grading) If current grading is not possible and cannot be achieved by selecting the switchgear in accordance with selectivity tables (dynamic selectivity), selectivity can be provided by timegrading short-time-delay overcurrent releases. This requires grading of both the tripping delays and the appropriate operating currents. 2/43 2 Circuitbreaker Power system Delay time t v of S-release Electronic S-releases With electronic short-time-delay overcurrent releases (S-releases), a grading time of approximately 70 ms to 100 ms from circuit-breaker to circuit-breaker is sufficient to allow for all tolerances. Operating current The operating current of the shorttime-delay overcurrent release should be set to at least 1.45 times (twice per 20% tolerance, unless other values are specified by the manufacturer) the value of the downstream circuitbreaker. Additional I-releases In order to reduce the short-circuit stress in the event of a “dead” short circuit at the upstream circuit-breakers, they can be fitted with instantaneous electromagnetic overcurrent releases in addition to the short-time delay releases (Fig. 2.5/4). The value selected for the operating current of the instantaneous electromagnetic overcurrent releases must be high enough to ensure that the releases only operate in case of direct ”dead” short circuits and, under normal operating conditions, do not interfere with selective grading. Zone-selective interlocking (ZSI) A microprocessor-controlled shorttime grading control, also called “zone-selective interlocking”, has been developed for circuit-breakers to prevent excessively long tripping times when several circuit-breakers are connected in series. This control function allows the tripping delay to be reduced to 50 ms (maximum) for the circuit-breakers located upstream of the short circuit. The method of operation regarding zone-selective interlocking is illustrated in Fig. 2.5/5. A short circuit at K1 is detected by Q1, Q3, and Q5. If ZSI is active, Q3 is temporarily disabled by Q1 and Q5 by Q3 by means 3WL1 300 ms of appropriate communication lines. Since Q1 does not receive any disabling signal, it trips after 10 ms. A short circuit at K2 is only detected by Q5; since it does not receive any disabling signal, it trips after 50 ms. Without “ZSI”, tripping would only occur after 150 ms. Selectivity between circuit-breaker and fuse When considering selectivity in conjunction with fuses, a permissible tolerance of ± 10% in the direction of current flow must be allowed for in the time-current characteristics. Circuit-breaker with downstream fuse Selectivity between LI-releases and fuses with very low rated currents In the overload range up to the operating current Ii of the instantaneous overcurrent release, partial selectivity is achieved if the upper tolerance band of the characteristic fuse curve does not touch the tripping curve of the fully preloaded, thermally delayed overcurrent release (L). A reduction in the tripping time of up to 25% must be allowed for at normal operating temperatures (unless the manufacturer states otherwise). Full selectivity for circuit-breakers without short-time-delay overcurrent releases is achieved if the let-through current of the fuse I D does not reach the operating current of the instantaneous overcurrent release.* This is, however, only to be expected for a fuse, the rated current of which is very low compared with the rated continuous current of a circuitbreaker. * See the current-limiting diagram for LV HRC fuses in Seip, Günther G. (Ed.): Electrical Installations Handbook, 4th edition, Erlangen, 2000, Section 4.1.1. 3WL1 3VL 200 ms 3VL 100 ms 3VL 3RV M instantaneous Fig. 2.5/3: Required delay time settings for electromagnetic short-time-delay releases for selective short-circuit protection Time grading with virtually identical short-circuit currents The upstream circuit-breaker is equipped with short-time-delay overcurrent releases (S) so that, if a fault occurs, only the downstream circuitbreaker disconnects the affected part of the installation from the system. Time grading can be implemented to safeguard selectivity if the prospective short-circuit currents are almost identical. This requires grading of both the tripping delays and the operating currents of the overcurrent releases. In addition to the diagram with the four series-connected circuit-breakers, Fig. 2.5/3 also contains the associated grading diagram. The necessary grading time, which allows for all tolerances, depends on the operating principle of the release and the type of circuit-breaker. 2/44 Totally Integrated Power by Siemens Power System [s] Sn = 1000 kVA at 400 V, 50 Hz ukr = 6% n = 1,445 A k = 24.1 kA Opening time t 10 4 10 3 Q1 Q3 Main distribution board Q2 subdistribution board t sd2 = 100 ms 10 0 k= Q2 Q3 t sd3 = 200 ms i (20 kA) 10 2 L 10 1 L L S tsd2 = 100 ms 17 kA 10 -1 S tsd3 = 200 ms Q1 k= 10 kA 10 -2 10 2 2 5 10 3 2 5 10 4 2 Current 5 10 5 [A] M ~ Fig. 2.5/4: Selectivity between three series-connected circuit-breakers with limitation of short-circuit stress by means of an additional I-release in circuit-breaker Q3 [s] tsd = 100 ms Q5 K2 A E tzss = 50 ms Opening time t 10 4 10 3 Q1/Q2/Q4 Q3 Q5 10 2 Q3 A E tsd = 100 ms tzss = 50 ms Q4 A E tsd = 10 ms tzss = tsd 10 1 10 0 A E A E tsd = 100 ms tzss Q1 Q2 tsd = 10 ms tzss = tsd 10 -1 tsd = 10 ms 10 -2 cn K1 communication line 10 2 10 3 10 4 Current 10 5 [A] Fig. 2.5/5: Zone-selective interlocking (ZSI) of series- or parallel-connected circuit-breakers (block diagram) 2/45 2 F1 Q1 F1 L Fuse Definite-time delayed overload release Instantaneous electromagnetic overcurrent release Q1 Circuit-breaker L Q1 t L characteristic curve of the inversetime-delay overload release (Fig. 2.5/8). In the case of short-circuits, it is important to remember that, after the releases in the circuit-breaker have tripped, the fuse continues to be heated during the arcing time. The selectivity limit lies approximately at the point where a safety margin of 70 ms between the lower tolerance band of the fuse and the operating time of the instantaneous overcurrent release or the delay time of the shorttime-delay overcurrent release is undershot. Selectivity ratios in the short-circuit range A reliable and usually relatively high selectivity limit for the short-circuit range can be determined in the I 2t diagram. In this diagram, the maximum let-through I 2t value of the circuit-breaker is compared with the minimum prearcing I 2t value of the fuse (Fig. 2.5/9). Since these values are maximum and minimum values, tolerances are obsolete. Selectivity with parallel supply Improving selectivity with parallel feeding systems When feeding in parallel to a busbar, the total short-circuit current I k ∑ that occurs in the faulted outgoing circuit comprises the partial short-circuit currents I k Part in the individual feeding lines and represents the base current in the grading diagram (Fig. 2.5/10). This is the case for all fault types. Two identical feeding systems If a short circuit occurs in the outgoing circuit downstream of the circuitbreaker Q1, the total short-circuit current I k ∑ of ≤ 20 kA, for example, flows through this circuit, while the I i Operating current of I-release F1 I The time-current curves (tolerance bands) do not touch i Overcurrent limit Fig. 2.5/6: Selectivity between circuit-breaker and downstream fuse in overload range F1 Q1 L S Definite-time delayed overload release Short-time-delayed overcurrent release t A Safety margin L S Q1 t L sd Operating current of S-release t s Prearcing time of fuse t sd Delay time of S-release tA > 100 ms S F1 ts k sd t sd Fig. 2.5/7: Selectivity between circuit-breaker with LS-releases and downstream fuse; short-circuit current range Selectivity between LS-releases and fuses with relatively high rated currents Due to the dynamic processes that take place in electromagnetic releases, absolute selectivity can also be achieved with fuses, whose I D briefly exceeds the operating current. Once again, selectivity can only be verified by means of appropriate measurements of I. Absolute selectivity can be achieved by using circuitbreakers with short-time-delay overcurrent releases (S-releases) if the characteristic curves – including safety margins – do not touch. In practice, a safety margin of 100 ms between the reference curves is usually sufficient (Fig. 2.5/7). Selectivity between fuse and downstream circuit-breaker Selectivity ratios in the overload range In order to achieve selectivity in the overload range, a safety margin of tA ≥ 1 s is required between the lower tolerance band of the fuse and the 2/46 Totally Integrated Power by Siemens Power System Q1 F1 F1 Q1 L I F1 t L tA≥ 1 s tA i feeder circuit-breakers Q2 and Q3, with the outgoing circuit connected centrally to the busbars and feeding lines of equal length, each carry only half this current, i.e. ≤ 10 kA. Additional current selectivity with parallel transformer operation In the grading diagram, the tripping characteristic of circuit-breakers Q2 and Q3 must, therefore, be considered in relation to the base current of the circuit-breaker Q1. Since the total short-circuit current is ideally distributed equally among the two feeding lines (ignoring the load currents in the other outgoing circuits) with the outgoing circuit located at the center of the busbars, the tripping curve of circuit-breakers Q2 and Q3 can be shifted optimally to the right along the current scale by a characteristic displacement factor of 2 up to the line I k ∑, which represents the base current for this fault condition. The result of this is selectivity both with regard to time and current. If the characteristic curve of the individual circuit-breaker is used Fuse Circuit-breaker Definite-time delayed overload release Instantaneous electromagnetic overcurrent release Safety margin Operating current of I-release L I Q1 I The time-current curves (tolerance bands) do not touch Overload limit Fig. 2.5/8: Selectivity between fuse and downstream circuit-breaker; overload range F1 2 Q1 F1 Sel F1 t Circuit-breaker (max. let-through value) Fuse (min. prearcing value) Selectivity limit Miniature circuitbreaker Q1 Q1 k Sel Selectivity limit Fig. 2.5/9: Selectivity between fuse and downstream circuit-breaker; short circuit [s] t T1 Equal output T2 Separate 10 4 10 3 Q1 L Parallel Q2 Q2+Q3 L L kTeil Basis k Q2 L S I r = sd = i = k < 600 A 3,000 A 12,000 A 10 kA kTeil Q3 L S I 10 2 k< 10 kA 101 S 10 0 i Q1 L I r = 200 A i = 2,400 A tsd = 100 ms (> 70 ms) 10 k -1 M ~ 10 2 10 2 2 4 6 10 3 2 3 4 6 10 4 2 4 [A] Fig. 2.5/10: Selectivity with two feeding transformers of the same rating and operating simultaneously. Example with outgoing circuit in the center of the busbar 2/47 2 T1 T2 T3 k Part 1 kS k k k Part 2 the I-releases, only the faulted transformer branch circuit will be disconnected on the high-voltage and lowvoltage side. The circuit-breakers in the “healthy” feeding systems remain operative. Q2 < 30 kA L Q1 S < 15 kA Q2 < 15 kA Q3 Q1 Q3 Parallel-connected feeding lines via tie breakers Tie breakers must perform the following protective functions in fault situations: Instantaneous tripping with faults in the vicinity of the busbars and relief of branch circuits of the effects of high total short-circuit currents. Selecting the circuit-breakers The type of device used in the branch circuits and the selectivity ratios depend primarily on whether circuitbreakers with current-zero cut-off, i.e. without current limiting, or with current limiting are used as tie breakers. Instantaneous, current-limiting tie breakers relieve the outgoing circuits of the effects of high unlimited total peak short-circuit currents Ip and, therefore, permit the use of lowerduty and less expensive circuit-breakers. Setting the overcurrent releases in tie breakers The values set for the overcurrent releases must be as high as possible in order to prevent operational interference caused by the tie breakers opening at relatively low short-circuit currents, e.g. in the branch circuits of the subdistribution boards. With two feeding lines With two feeding lines and depending on the fault location (left or right busbar section or outgoing circuit), 15 kA 15 kA k∑ Fig. 2.5/11: Selectivity with three feeding transformers operating simultaneously Fig. 2.5/12: Short-circuit distribution via the tie breaker Q3 with two feeders Q1 and Q2 instead of the shifted characteristic, the exact short-circuit current (distribution) which flows through the circuit-breaker must be taken into consideration. With asymmetrical configurations and with incoming (feeding) and outgoing circuits located in the busbars, shortcircuit current distribution will differ according to the impedance along the feeding lines. This is particularly significant in the event of fused branch circuits with high current ratings, e.g. 630 A to 1,000 A. It is important to ensure that a safety margin of ≥ 100 ms between the tripping characteristic of the S-release and the prearcing-time/ current characteristic of the LV HRC fuse is provided not only with parallel operation, but also with individual transformer operation. When setting the releases of circuitbreakers Q1, Q2 and Q3, it must be ensured that selectivity is also achieved for operation with one transformer and for all short-circuit currents (single- to three-phase). For cost-related reasons, S-releases for the feeder circuit-breakers must also be provided for low and medium rated fuse currents as the resulting current selectivity of I-releases is insufficient. Three identical feeding systems With parallel operation of three transformers, the selectivity ratios will, owing to the additional current selectivity, be more favorable than with two units since the characteristic displacement factor is > 2 and < 3. Once again, LS-releases are required for the circuit-breakers in the feeding lines in order to achieve unambiguous selectivity ratios. Furthermore, it is necessary to provide additional I-releases to allow a fault between the transformer and feeder circuit-breaker to be detected, as shown in Fig. 2.5/11. For this purpose, the S-releases of circuit-breakers Q1 to Q3 must be set to a value < Ik and the I-releases to a value > Ik but < < Ik ∑. The highest and lowest fault currents are important here. Due to 2/48 Totally Integrated Power by Siemens Power System a) Fault in the outgoing circuit of center busbar section b) Fault in the outgoing circuit of outer busbar section Fig. 2.5/14 illustrates the voltage conditions in LV switchgear with a ”dead” short circuit. If a short circuit occurs at K (Fig. 2.5/14a), the rated operating voltage Ue drops to 0.13 Ue at the busbar of the subdistribution board and to 0.5 x Ue at the busbar of the main distribution board. The next upstream circuit-breaker Q1 clears the fault. Depending on the size and type of the circuit-breaker, the total breaking time is ≤ 30 ms for zero-current interrupters and a maximum of 10 ms for current-limiting circuit-breakers. If a short-circuit occurs at K2 (Fig. 2.5/14b), the circuit-breaker Q2 opens. It is equipped with a shorttime-delay overcurrent release (S). The delay time is at least 100 ms. During this time, the rated operating voltage at the busbar of the main distribution board is reduced to 0.13 x Ue. If the rated operating voltage drops to 0.7 – 0.35 times this value and voltage reduction takes longer than approximately 20 ms, all of the circuit-breakers with undervoltage releases open. All contactors also open if the rated control supply voltage collapses to below 75% of its rated value for longer than 5 to 30 ms. Tripping delay for contactors and undervoltage releases Undervoltage releases and contactors with tripping delay are required to ensure that the selective overcurrent protection is not interrupted prematurely. They are not necessary if current-limiting circuit-breakers, which have a maximum total clearing time of 10 ms, are used. k Part 1 k Part 2 k Part k Part Q1 Q4 Q2 Q5 Q3 Q1 Q4 Q2 Q5 Q3 3 k∑ k k∑ 2 k Part Fig. 2.5/13: Distribution of the short-circuit currents used in determining the settings for the overcurrent release – in the tie breakers Q4 and Q5 with three feeders and faults a and b – in the outgoing circuits in different busbar sections only the associated partial shortcircuit current (e.g. I k Part 2) flows through the tie breaker Q3 as shown in Fig. 2.5/12. With three feeding lines and fault With three feeding lines, the ratios are different according to which of the branch circuits shown in Fig. 2.5/13a and b is faulted. In the center busbar section If a fault occurs at the outgoing circuit of the center busbar section (Fig. 2.5/13a), approximately equal partial short-circuit currents flow through the tie breakers Q4 and Q5. In the outer busbar section If a fault occurs at the outgoing circuit of the outer busbar section, (Fig. 2.5/13b), two partial short-circuit currents flow through the tie breaker Q4. Computer-assisted selectivity check Precise values for the short-circuit currents, which flow through the tie breakers, are required to permit optimum setting of the overcurrent releases. They provide information concerning selective characteristics with a large number of different fault currents, and are determined and evaluated with the aid of a computer program. Selectivity and undervoltage protection If a short circuit occurs, the system voltage collapses to a residual voltage at the short-circuit location. The magnitude of the residual voltage depends on the fault impedance. With a ”dead” short circuit, the fault impedance and, therefore, the voltage at the short-circuit location drops to almost zero. Generally speaking, however, arcs with arc-drop voltages between approximately 30 V and 70 V occur with short circuits. This voltage, starting at the fault location, increases proportionately to the intermediate impedance with increasing proximity to the power source. 2/49 2 a) Short circuit in subdistribution board b) Short circuit in main distribution board Q3 0.5.Ue Q3 0.13 Ue Main distribution board . Q2 tv > 100 ms 80 m 3 x 95 mm2 Cu Q2 K2 Subdistribution board 0.13 Ue . Q1 Q1 tv = 0 K1 Ue Rated operating voltage tv Delay time Fig. 2.5/14: Voltage conditions for short-circuited LV switchgear with a main and subdistribution board k1 F1 k1 + k2 a F2 k2 k3 = F3 k3 + k4 K1 k4 k k b k Fig. 2.5/15: Short-circuited cable with its two feeder nodes a and b Fig. 2.5/16: Example of a meshed system with multi-phase feeding 2/50 Totally Integrated Power by Siemens Power System 2.5.2 Selectivity in Meshed Systems Two selectivity functions must be performed in meshed systems: Only the short-circuited cable may be disconnected from the system. If a short-circuit occurs at the terminals of a feeding transformer, only the faulted terminal may be disconnected from the system. Node fuses The nodes of a meshed LV system are normally equipped with cables with the same cross section and with LV HRC fuses of utilization category gL of the same type and rated current (Fig. 2.5/15). If a short circuit (K1) occurs along the meshed system cable, the short-circuit currents I k3 and I k4 flow to the fault location. Short-circuit current I k3 from node ”a” comprises the partial currents I k1 and I k2 which may differ greatly depending on the impedance ratios. Permissible current ratio Selectivity of the fuses at node a is achieved if fuse F3, through which the total current I k3 flows, melts and fuse F1 or F2, through which the partial short-circuit I k1 or I k2 flows, remains operative. In the case of Siemens LV HRC fuses (400 V, max. 400 A), the permissible current ratio I k1 /(I k1 + I k2 ) for high short-circuit currents is 0.8. Power transformers in meshed systems Feeder circuit-breaker In multi-phase meshed systems (Fig. 2.5/16), i.e. feeding several mediumvoltage lines and transformers, power feedback from the LV system to the fault location should be prevented if a fault occurs in a transformer substation or medium-voltage line. A network master relay (reverse power relay) used to perform this task at the low-voltage side of the transformer. Today, circuit-breakers with electronic releases, e.g. an S-release with an I 2t characteristic, are used for this task. If a short circuit occurs on the HV side of the transformer (K1) or between the transformer and network circuitbreaker (K2) or along the cable (K3) (Fig. 2.5/17), the HV HRC fuse operates on the HV side; on the LV side, power flows back to the fault location via the low-voltage circuit-breaker and its S-release (with I 2t characteristic). As the sum of all short-circuit current quantities from all the other transformers flows through this circuit- breaker, this circuit-breaker will trip fast enough and thus selectively, owing to its I 2t characteristic. K3 a K1 K2 b a HV HRC fuses c b LV circuit-breaker with I²t characteristic in the S-release Node fuses c Fig. 2.5/17: Block diagram showing the feeding point of a meshed LV power system 2/51 2 2.6 Protection of Capacitors According to IEC 60358 / VDE 0560 Part 4, capacitor units must be suitable for continuous operation with a current whose r.m.s. value does not exceed 1.3 times the current which flows with a sinusoidal voltage and rated frequency. Owing to the abovementioned dimensioning requirements, no overload protection is provided for capacitor units in the majority of cases. Capacitors in systems with harmonic components The capacitors can only be overloaded in systems with devices which generate high harmonics (e.g. generators and converter-fed drives). The capacitors, together with the series-connected transformer and short-circuit reactance of the primary system, form an anti-resonant circuit. Resonance phenomena occur if the natural frequency of the resonant circuit matches or is close to the frequency of a harmonic current generated by the power converter. Reactor-connected capacitors The capacitors must be equipped with reactors to prevent resonance.* An LC resonant circuit, whose resonance frequency is below the lowest har- monic component (250 Hz) in the load current, is used instead of the capacitor. The capacitor unit is thus inductive for all harmonic currents that occur in the load current and can, therefore, no longer form a resonant circuit with the system reactance. Settings of the overload relay If thermal time-delay overload relays are used to provide protection against overcurrents, the tripping value can be set at 1.3 to 1.43 times the rated current of the capacitor since, allowing for the permissible capacitance deviation, the capacitor current can be 1.1 x 1.3 = 1.43 times the rated capacitor current. With transformer-heated overload relays or releases, a higher secondary current flows due to the changed transformation ratio of the transformers caused by the harmonic components. This may result in premature tripping. Harmonics suppression by means of filter circuits An alternative solution would be to use filter circuits to remove the majority of harmonics from the primary system. ** The filter circuits are also series-resonant circuits which, unlike the reactor-connected capacitors, are tuned precisely to the frequencies of the harmonic currents to be filtered. As a result, the impedance is almost zero. Short-circuit protection LV HRC fuses with utilization category gL are typically used in capacitor units for short-circuit protection. A rated fuse current of 1.6 to 1.7 times the rated current of the connected capacitor modules is selected to prevent the fuses from tripping in the overload range and when the capacitors switch. Note: Fuses, fuse-switch-disconnectors, capacitors and contactors must be matched during configuration. We recommend using complete assembly kits (see Application Manual – Establishment of Basic Data and Preliminary Planning, Section 5.8) * Seip, Günther G. (Ed.): Electrical Installations Handbook, 4th edition, Erlangen, 2000, Section 1.6. ** Seip, Günther G. (Ed.): Electrical Installations Handbook, 4th edition, Erlangen, 2000, Sections 1.6.3, 16.4. 2/52 Totally Integrated Power by Siemens Power System 2.7 Protection of Distribution Transformers The following devices are used for protection tasks in medium-voltage systems: HV HRC fuses High-voltage high-rupturing-capacity (HV HRC) fuses usually used in conjunction with switch-disconnectors to protect radial feeders and transformers against short circuits. Circuit-breakers with protection Protection relays Protection relays connected to current transformers (protection core) can be used to perform all protection-related tasks irrespective of the magnitude of the short-circuit currents and rated operating currents of the required circuit-breakers. Digital protection Modern protection equipment is controlled by microprocessors (digital protection) and supports all of the protective functions required for a medium-voltage branch circuit. Protection as component of the energy automation system Digital protection also allows operat- ing and fault data, which can be called up via serial data interfaces, to be collected and stored. Digital protection can, therefore, be incorporated in substation control and protection systems as an autonomous component. Current transformer rating for protection purposes Current transformers are subject to the standards DIN VDE 0414, Parts 1 to 3, as well as IEC 185 and IEC 186. Current transformers with 5P or 10P cores must be used for connecting protection equipment. The required rated output and overcurrent factor must both be determined on the basis of the information provided in the protection relay descriptions. Overcurrent protection Overcurrent protection via current transformers for protecting cables and transformer branches can be either two-phase or three-phase. The neutral-point connection of the mediumvoltage network must be considered here. Relay operating currents with emergency generator operation Care should be taken to ensure that the operating currents of the protection relays provided for normal system operation are also attained in the event of faults during emergency operation using generators with relatively low rated outputs. Three-phase time-overcurrent protection In the interests of future system safety, it is advisable to configure the time-overcurrent protection as a three-phase system, irrespective of the method of neutral-point connection. Note: Protection against internal faults (excess temperature etc.), see Section 2.7.2. 2/53 2 2.7.1 Protection with Overreaching Selectivity min 1,000 3GD 50 A 10 kV Basis < 10.5 kA 3GD 50 A Ideally, transformer branches should be protected by: HV HRC fuses High-voltage high-rupturing-capacity (HV HRC) fuses used in conjunction with switch-disconnectors for rated transformer outputs of up to approx. 1,250 kVA for low switching rates, or Circuit-breakers with protection Circuit-breakers with protection of about 800 kVA of higher, and for high switching rates; also when several circuit-breakers with S-releases are arranged in series on the low-voltage side and selectivity is not possible with upstream HV HRC fuses. The anticipated selectivity conditions must, therefore, be checked before the protection concept is chosen and details determined. Protection by means of HV HRC fuses Dimensioning HV HRC fuses The rated current of the HV HRC fuses specified by the manufacturers for the rated output of each transformer should be used when dimensioning the HV HRC fuses. The lowest rated current is dictated by the rush currents generated when the transformers are energized and is 1.5 to 2 times the rated transformer currents. Energizing current of the transformer The lowest rated current is dimensioned by the rush currents generated when the transformers are energized and is 1.5 to 2 times the rated transformer current. In practice it is normally sufficient if the maximum energizing current of the transformer has a selective clearance of 20% from the fuse curve at 0.1 s t k 100 400 kVA u kr 6% k < 10.5 kA 0.4 kV s 10 1 a min 25% safety margin Rush ms 0.1 20% safety margin 0.01 1,000 A at 0.4 kV A at 10 kV ts 1,000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 200 40 0 / A at 0.4 kV 20,000 80 0 50 ,000 2,000 100,000 Prearcing time of fuses Lowest breaking current a min of HV HRC fuse Fig. 2.7/1: Example for dimensioning a HV HRC fuse acc. to the minimum breaking current of the HV HRC fuse and the energizing current of the transformer In order to determine the maximum rated current, the minimum breaking current Ia min of the fuse must be exceeded in the event of a short circuit on the secondary side of the transformer reaching as far as the busbars in the installation. Actual practice has shown that a 25% minimum safety margin of Ia min should be established in relation to the short-circuit current Ik of the transformer between the calcu- lated maximum short-circuit current in the vicinity of the busbar on the lowvoltage side (converted to the medium-voltage side) and the minimum breaking current Ia min (the circle in the prearcing-time/current characteristic). The fuse link can be chosen between the above specified limits according to the selectivity requirements (see Fig. 2.7/1). 2/54 Totally Integrated Power by Siemens Power System Protection by switch-disconnectors and HV HRC fuses As a load interrupter switch is normally used for transformer protection, when HV HRC fuses are used, its limited current breaking capacity must be taken into account. According to IEC 62271-105 / VDE 0671-105, the following two conditions must be met among others: The transient current of the HV HRC fuse / switch-disconnector combination must be lower than the breaking capacity of the load interrupter switch. A secondary-side transformer short circuit should be cleared by the HV HRC fuse in order to relieve the load interrupter switch from high transient recovery voltages. On account of the extremely complex interaction of this combination and the data required, such as the characteristic time-current curve of the HV HRC fuse, time to contact separation and rated transient current of the load interrupter switch, the manufacturer of the medium-voltage switchgear must provide the fuse type and rated current to be used for the specified transformer. In practice it may happen under difficult conditions, that simultaneous compliance with both standards IEC 60787 / DIN VDE 0670-402 and IEC 62271-105 / VDE 0671-105 is not possible. In these cases, the switchgear manufacturer should be consulted, or a circuit-breaker should be used for transformer protection. Working range covered by standby protection HV HRC fuses must provide sufficient standby protection in case of a failure of the downstream protective device. The required working range can be seen in Fig. 2.7/2, illustrated for three circuit diagrams. The working range of the standby protection is inversely proportional to the rated fuse current. Further information on safety margins, e.g. for gradings as shown in Fig. 2.7/2, case b and c, is given below. Grading of HV HRC with LV HRC fuses in supply circuits Grading HV HRC fuses and LV HRC fuses is mainly used for transformers with rated outputs of max. 400 kVA, when LV HRC fuse switch-disconnectors or motor fuse-disconnectors (maximum rated current 630 A) are also applied (example: Fig. 2.7/3); circuit-breakers with overcurrent releases are used at the low-voltage side for rated outputs ≥ 500 kVA. It is acceptable for the prearcingtime/current characteristics F2 (LV HRC) and F3 (HV HRC) – referred to 0.4 kV – to touch or intersect, and the switch-disconnector to be possibly tripped on the high-voltage side by the upstream HV HRC fuse, since both fuses protect the same system ele- ment and interruption will occur in all cases (limited selectivity). HV HRC fuses with higher rated currents (e. g. 80 A as shown in Fig. 2.7/3) would not be suitable here, since their minimum breaking current Ia min has no safety margin of at least 25% below the short-circuit current Ik which the transformer can carry (max. 10.5 kA). A non-selective fuse response, as demonstrated in the example of the 50 A HV HRC fuse towards the 630 A low-voltage fuse (Fig. 2.7/3) may result in damage of unblown fuse links in case of faults in the LV busbar, so that the tripping characteristic is changed and the fuse may trip at any time under any load – even its rated current. In the event of protective tripping by the HV HRC fuse, or the low-voltage fuse, both fuse links should always be replaced altogether. This applies to all descriptions below and the examples given for HV HRC fuses, where non-selective protection at the transformers’ low-voltage side is provided (Fig. 2.7/4 to Fig. 2.7/6). HH HH HH Required scope of standby protection a NH 3WL S 3WL 400 V c NH NH NH b S Network master relay 7RM Fig. 2.7/2: Necessary scope of standby protection of HV HRC fuses when different protection equipment is used at the low-voltage side 2/55 2 1,000 F3 3GD 50 A 3GD 80 A F2 3NA 630 A F3 k 10 kV 1,000 F2 3GD 80 A F2 100 Q1 3WL 1000 A Basis k< 10 kV t min 3GD 50 A (80 A) 400 kVA u kr 6% t min 3GD 80 A 630 kVA u kr 6% 100 Basis < 10.5 kA 16.4 kA F1 3NA 400 A F2 3NA 630 A 2t -characteristic Q1 3WL 1,000 A t sd 300 ms 0,4 kV 10 0.4 kV 10 F1 3NA 315 A F1 3NA 315 A s F1 3NA 400 A k< s 16.4 kA 1 a min k < 10.5 kA 1 t sd 25% safety margin is not maintained! ms ms 0.1 0.1 0.01 1,000 A at 0.4 kV A at 10 kV ts 1,000 40 2,000 3,000 80 120 0.01 10,000 5,000 7,500 10,000 2 00 40 0 / A at 0,4 kV 20,000 80 0 50 ,000 2,000 100,000 A at 0.4 kV A at 10 kV 1,000 1,000 40 2,000 3,000 80 12 0 10,000 5,000 7,50010,000 2 00 40 0 / A at 0.4 kV 20,000 50 ,000 2,000 100,000 12 800 Prearcing time of fuses Lowest breaking current a min of HV HRC fuse t s Prearcing time of fuses t sd Delay time of S-release (Q1) Fig. 2.7/3: Example of grading HV HRC fuses – LV HRC fuses in the branch circuit, and a 400 kVA transformer Fig. 2.7/4: Example of grading a HV HRC fuse F2 with circuit-breaker Q1 and downstream LV HRC fuse F1 in the branch circuit Grading of HV HRC fuses with LV circuit-breakers and downstream LV HRC fuses Requirements Selectivity is to be established between the protective devices of the branch circuits and those of the supply, which together form a functional unit; the safety margins of the protective devices must also be taken into account (Fig. 2.7/4 and Fig. 2.7/5). Grading between LV HRC fuses and L/S releases Selectivity is ensured with the 315 A fuse link used in the example (Fig. 2.7/4). With L- and S-releases, the excitation values IR and Isd as well as the delay times tR and tsd must be matched to the transformer output and the downstream LV HRC fuse. If a low-voltage circuit-breaker is used with an additional I4t characteristic in the L-release, higher LV HRC fuses can be used in the branch circuits owing to characteristics, and selectivity will still be maintained (Fig. 2.7/5). If circuit-breakers, such as the SENTRON 3WL, are used instead of LV HRC fuses, branch circuits can be configured with higher currents while maintaining selectivity (Fig. 2.7/6), as the S-releases can be adapted accordingly with regard to their excitation currents Isd and delay times tsd . Grading between HV HRC fuses and L/S releases Since the protective devices in the feeding system form a functional unit, a restriction in selectivity in the upper short-circuit current range is accepted in case of faults in the vicinity of the busbars (as indicated by the circle in the diagram for the 80 A HV HRC fuse in Fig. 2.7/4 to 2.7/6), because faults inside the switchgear in this shortcircuit range can virtually be outruled for Siemens low-voltage SIVACON switchboards. Even partial selectivity of the lowvoltage circuit-breaker in the branch circuit with the HV HRC fuse (see Fig. 2.7/6) in the upper short-circuit range is often acceptable, as dead 3-phase 2/56 Totally Integrated Power by Siemens Power System 1,000 F2 3GD 80 A Q1 3WL 1,000 A 4t characteristic F2 Basis k< 1,000 10 kV min F2 3GD 80 A Q2 3WL 1,000 A 2t characteristic Q1 3WL 630 A 2t characteristic F2 Basis k< 10 kV t min t 3GD 80 A 630 kVA u kr 6% 3GD 80 A 630 kVA u kr 6% 100 16.4 kA 100 16.4 kA Q1 3WL 1,000 A sd 4,000 A t sd 300 ms 0.4 kV Q2 3WL 1,000 A sd 4,000 A t sd 300 ms 0.4 kV 10 F1 3NA 400 A F1 3NA 315 A s 10 Q1 3WL 630 A sd 2,520 A t sd 200 ms s k< 16.4 kA 1 k< 16.4 kA 1 t sd t sd2 t sd1 ms ms 0.1 0.1 0.01 1,000 A at 0.4 kV A at 10 kV 1,000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 2 00 40 0 / A at 0,4 kV 20,000 80 0 50 ,000 2,000 10,0000 0.01 1,000 A at 0.4 kV A at 10 kV 1000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 2 00 40 0 / A at 0.4 kV 20,000 80 0 50 ,000 2,000 100,000 t s Prearcing time of fuses t sd Delay time of S-release (Q1) ts Prearcing time of fuses t sd1 Delay time of S-release (Q1) t sd2 Delay time of S-release (Q2) Fig. 2.7/5: Example of grading a HV HRC fuse F2 with circuit-breaker Q1 (optional I4t characteristic of the L-release) and downstream LV HRC fuse F1 in the branch circuit Fig. 2.7/6: Example of grading a HV HRC fuse F2 with circuit-breaker Q2 and downstream circuit-breaker Q1 with an LSI-release in the branch circuit short-circuit currents can be outruled in practice, and faults will be below the selectivity level just a few meters downstream of the protective device (here: the intersection of the HV HRC fuse curve and S-release curve). In these cases, the focus is on improved cost-efficiency, as offered by a HV HRC fuse compared to a medium-voltage circuit-breaker, rather than on the criterion of 100% selectivity. Attention: Tie breakers connecting safety power supply networks (SPS networks) must fulfill the criterion of full selectivity towards line-side HV HRC fuses in compliance with IEC 60364-7-710 / VDE 0100-710 and VDE 0100-718! The requirement of full selectivity and the use of HV HRC fuses can often be met by implementing zone-selective interlocking with low-voltage circuitbreakers. All of the downstream distribution systems and protective devices, as well as the short-circuit currents likely to be present at the fault locations must then be taken into account. Tolerances of HV HRC fuses According to EN 60282-1 / DIN VDE 0670-4, the tolerance of HV HRC fuse links can be ±20%. Siemens HV HRC fuse links have a tolerance of ±10%. 2/57 2 1,000 10 kV Q3 t min 60/1 A > >> 66 A/500 ms 780 A/50 ms 100 Protection by means of circuitbreakers with definite-time overcurrent protection (DMT) Requirements The two feeder circuit-breakers (in Fig. 2.7/7, 2.7/8 and Fig.2.7/9, 2.7/10) form a functional unit and require selectivity with respect to the protection devices on the low-voltage side. DMT protection Nowadays, digital devices are used to provide DMT protection in practically all applications. They have broader setting ranges, allow a choice between definite-time and inversetime overcurrent protection or overload protection, provide a greater and more consistent level of measuring accuracy and are self-monitoring. 2-zone DMT protection If DMT protection is applied, whose protective function merely consists of the two I> (ANSI Code 51) and I>> (ANSI Code 50) short-circuit zones, and if no further measures are taken for transformer protection, the I> zone is normally used as standby protection for the low-voltage side, i.e. the I> zone is set to 1.5 up to 2.0 times the transformer’s rated current value. This means that the size of the branch circuits in the main distribution system at the low-voltage level is limited in order to ensure selectivity there. For example, with a 630 kVA transformer this means: A fuse of a maximum size of 160 A can be used in the main distribution (Fig. 2.7/7). In practice this roughly corresponds to 20% of the rated transformer current. With circuit-breakers, their maximum size depends on the setting ranges of the circuit-breakers’ releases and their tolerances, as well as the protective devices in the branch circuits of the subdistribution board. Selective grading using s 10 Basis Q2 3WL 1,000 A 2t characteristic k < 16.4 kA 630 kVA u kr 6% Q2 3WL 1,000 A sd 4,000 A t sd 300 ms 0.4 kV Q1 3WL 630 A sd 1,260 A t sd 200 ms F1 3NA 160 A k< 16.4 kA k< 16.4 kA 1 Q3 > / t> t sd2 ms F1 3NA 160 A 0.1 Q3 >> / t >> 0.01 1,000 A at 0.4 kV A at 10 kV ts t sd1 t sd2 t > / t >> 1,000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 2 00 40 0 / A at 0,4 kV 20,000 80 0 50,000 2,000 100,000 Prearcing time of fuses Delay time of S-release (Q1) Delay time of S-release (Q2) Delay times of short-circuit tripping zones > / >> of the DMT protection (Q3) Grafik 2.7/7: Example of grading a circuit-breaker with DMT protection (Q3), circuit-breaker 3WL, 1,000 A with LSI-release (Q2) and downstream branch circuits, e.g. LV HRC fuse 160 A (F1), and a transformer supplying 630 kVA a SENTRON 3WL, 630 A, or even 800 A is possible (Fig. 2.7/8). Generally speaking, circuit-breakers can be used with current ratings of 50% up to 80% of the rated transformer current. Intersection of the characteristic curves Q2 and Q3 in the middle shortcircuit range is permissible, because the low-voltage circuit-breaker and the medium-voltage circuit-breaker form a functional unit; the L-release of the low-voltage circuit-breaker Q2 protects the transformer against overloading, which practically applies in the range of 1.0 – 1.3 times the rated current of the transformer only; a safety margin of 50 ms to 100 ms exists between the tripping value of the I> zone of the DMT protection (lower tolerance band) and the upper tolerance bands of the characteristic LV HRC fuse curve F1 and the S-release of the circuit-breaker Q1 in the branch circuits, which means that selectivity is ensured. 2-zone DMT protection with overload protection If advanced DMT protection equipment is applied, which provides 2/58 Totally Integrated Power by Siemens Power System 1,000 10 kV Q3 t min 60/1 A > >> 66 A/500 ms 780 A/50 ms 100 Q1 3WL 630 A 2t characteristic Basis k< 16.4 kA 630 kVA u kr 6% Q2 3WL 1,000 A sd 4,000 A t sd 300 ms 0.4 kV Q1 3WL 630 A sd 1,260 A t sd 200 ms Q2 3WL 1,000 A 2t characteristic 50% up to 80% of the rated transformer current. Current transformer sizing for protection purposes Dimensioning a current transformer depends on many parameters if correct functioning of the relays is to be ensured. This includes maximum short-circuit currents present, requirements set by the protective devices on the current transformers, secondary-side rated current transformer current, burden of the connecting cables and other connected protective devices, power output and inherent burden of the current transformer, rated accuracy limit factor of the current transformer. Authorized information on the precise rating of these current transformers matching the protection relays applied and the prevailing boundary conditions can only be given by the specialized technical departments of the equipment manufacturer. In practice, the rated currents of the current transformers used for DMT protection devices can be determined as follows: General use of 1-A transformers (secondary side) if numerical protection technology is applied: usually, this approach almost completely outrules possible problems regarding non-saturated transmission of short-circuit currents and the burdening of the current transformers for DMT protection in advance. The primary rated current of the current transformer should be 1.2 to 2.0 times the transformer rated current. This protects the current transformer against damage from overload, as for cost reasons, cur- s 10 F1 3NA 160 A k< 16.4 kA k< 16.4 kA 1 Q3 > / t> t sd2 t sd1 0.1 Q3 >> / t >> ms 0.01 1,000 A at 0.4 kV A at 10 kV ts t sd1 t sd2 t > / t >> 1,000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 2 00 40 0 / A at 0.4 kV 20,000 80 0 50 ,000 2000 100,000 Prearcing time of fuses Delay time of S-release (Q1) Delay time of S-release (Q2) Delay times of short-circuit tripping zones > / >> of the DMT protection (Q3) Fig. 2.7/8: Example of grading a circuit-breaker with DMT protection and overload protection (Q3), circuit-breaker 3WL, 1,000 A with LSI-release (Q2) and downstream branch circuits, e.g. LV HRC fuse 160 A (F1), and a transformer supplying 630 kVA additional overload protection Ith (ANSI Code 49) besides the two standard short-circuit protection zones I> and I>>, the I> zone can act as a “proper” short-circuit protection zone, and the overload protection can be used as transformer protection and standby protection for the lowvoltage side. Above all, this allows the use of larger fuses in the lowvoltage branch circuits. With regard to overload protection, it must be ensured that the initial load is also taken into account for a selectivity evaluation. For a 630 kVA transformer this means: A fuse of a maximum size of 315 A can be used in the main distribution (Fig. 2.7/9). In practice this roughly corresponds to 35% of the rated transformer current. With circuit-breakers, their maximum size depends on the setting ranges of the circuit-breakers’ releases and their tolerances, as well as the protective devices in the branch circuits of the subdistribution board. Selective grading using a SENTRON 3WL, 630 A, or even 800 A is possible (Fig. 2.7/10). Generally speaking, circuit-breakers can be used with current ratings of 2/59 2 1,000 10 kV Q3 min th Q3 60/1 A th t 0% Vorlast 100% Vorlast 100 Q2 3WL 1,000 A 2t characteristic Basis k< > >> 42 A 210 A/500 ms 780 A/50 ms 16.4 kA 630 kVA u kr 6% Q2 3WL 1,000 A sd 4,000 A t sd 300 ms 0,4 kV Q1 3WL 630 A sd 2,560 A t sd 200 ms rent transformers without overload capability are nowadays used in applications, unless requirements are explicitly defined otherwise. The primary rated current of the current transformer should not exceed 4 times the transformer rated current in order to prevent significant impacts of current transformers tolerances on measurements and current evaluations. For our example this means: Rated transformer current 36.4 A (630 kVA, 10 kV) –> rated current of current transformer, primary side [1.2 x InTr ... 2 x InTr] = [43.7 A ... 72.8 A] –> A 60/1-A current transformer is chosen. Setting the short-circuit current zones I >, I>> and time delays t >, t >> Short-circuit current zone I >: (Fig. 2.7/9 and Fig. 2.7/10) Assuming that additional overload protection Ith has also been set in the DMT protection device, the shortcircuit current zone is chosen in such a way that it will excite at a safety margin of approx. 20% towards the minimum single-phase fault on the secondary side of the transformer. Please note that on account of the transformer’s Dy vector group, this fault is shown on the primary side as follows: s 10 F1 3NA 315 A F1 3NA 315 A k< 16.4 kA k< 16.4 kA 1 Q3 > / t> t sd2 ms 0.1 Q3 >> / t >> 0.01 1,000 A at 0.4 kV A at 10 kV ts t sd1 t sd2 t > / t >> 1,000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 2 00 40 0 / A at 0.4 kV 20,000 80 0 50,000 2,000 100,000 Prearcing time of fuses Delay time of S-release (Q1) Delay time of S-release (Q2) Delay times of short-circuit tripping zones > / >> of the DMT protection (Q3) Fig. 2.7/9: Example of grading a circuit-breaker with DMT protection (Q3), circuit-breaker 3WL, 1,000 A with LSI-release (Q2) and downstream branch circuits, e.g. circuit-breaker 3WL, 630 A with LSI-release (Q1), and a transformer supplying 630 kVA Consequently, when considering a safety margin of 20%, there is: I’k min prim = 0,8 x Ik min prim ≈ 230 A A selected value of I’k min prim = 210 A results in the following setting value: Short-circuit current zone I >>: (Fig. 2.7/9 and Fig. 2.7/10) The short-circuit current zone I >> is set in such a way, that it will only acquire primary-side faults which are then cleared as fast as possible. Usually, it is chosen with a safety margin of approx. 20% above the maximum three-phase fault on the secondary side of the transformer. When taking the new cmax factor for low-voltage networks into account as given in the standard for short-circuit current calculation, IEC 60909 / VDE 0102, the maximum secondaryside three-phase short-circuit current can initially be estimated as: representing the transformer’s transformation ratio, in the example: ü = 10 kV / 0.4 kV = 25 Assuming a minimum single-phase short-circuit current of approx. 12.5 kA (in this example: transformer with 630 kVA, ukr 6%), there is: Ik min prim ≈ 288 A The time delay of the I > zone is set to: t ≥ 0.5 s 2/60 Totally Integrated Power by Siemens Power System 1,000 10 kV Q3 min th Q3 60/1 A th t 0% Vorlast 100% Vorlast 100 Q2 3WL 1,000 A 2t characteristic Q1 3WL 630 A 2t characteristic s 10 F1 3NA 315 A > >> 42 A 210 A/500 ms 780 A/50 ms Basis k< 16.4 kA 630 kVA u kr 6% Q2 3WL 1,000 A sd 4,000 A t sd 300 ms 0,4 kV Q1 3WL 630 A sd 2,560 A t sd 200 ms 2.7.2 Equipment for Protecting Distribution Transformers (against Internal Faults) The following signaling devices and protection equipment are used to detect internal transformer faults: Devices for monitoring and protecting liquid-cooled transformers such as Buchholz protectors, temperature detectors, contact thermometers, etc. Temperature monitoring systems for GEAFOL resin-encapsulated transformers comprising: – temperature sensors in the lowvoltage winding and – signaling and tripping devices in the incoming-feeder switch panel. The thermistor-type thermal protection protects the transformer against overheating resulting from increased ambient temperatures or overloading. Furthermore, it allows the full output of the transformer to be utilized irrespective of the number of load cycles without the risk of damage to the transformer. These signaling and protection devices do not have to be included in the grading diagram. k< 16.4 kA k< 16.4 kA 1 Q3 > / t> t sd2 t sd1 ms 0.1 Q3 >> / t >> 0.01 1,000 A at 0,4 kV A at 10 kV ts t sd1 t sd2 t > / t >> 1,000 40 2,000 3,000 80 120 10,000 5,000 7,50010,000 2 00 40 0 / A at 0.4 kV 20,000 80 0 50 ,000 2,000 100,000 Prearcing time of fuses Delay time of S-release (Q1) Delay time of S-release (Q2) Delay times of short-circuit tripping zones > / >> of the DMT protection (Q3) Fig. 2.7/10: Example of grading a circuit-breaker with DMT protection and overload protection (Q3), circuit-breaker 3WL, 1,000 A with LSI-release (Q2) and downstream branch circuits, e.g. circuit-breaker 3WL, 630 A with LSI-release (Q1), and a transformer supplying 630 kVA A selected value of I’k max prim = 780 A results in the following setting value: In practice, the time delay of the I >> stage is set to 50 – 100 ms. Assuming the transformer of our example (630 kVA, ukr 6%) and a cmax factor = 1.05, there is Ik max prim ≈ 636 A Consequently, when considering a safety margin of 20%, there is: I’k max prim = 1.2 x Ik max prim ≈ 764 A 2/61 2 2.8 Protection of Technical Building Installations – Lightning Current and Overvoltage Protection 2.8.1 Standards, Regulations and Guidelines Direct damaging effects of lightning and overvoltages can be prevented or at least reduced by taking appropriate action. Such protection measures cause a safe current discharge and prevent injections of potential differences. Relevant standards are: DIN EN 62305-1 (VDE 0185-305-1): 2006-11 Protection against lightning, Part 1: General principles DIN-EN 62305-2 (VDE 0185-305-2): 2006-11 Protection against lightning, Part 2: Risk management: Calculation assistance for assessment of risk for structures DIN-EN 62305-3 (VDE 0185-305-3): 2006-11 Protection against lightning, Part 3: Physical damage to structures and life hazard DIN-EN 62305-4 (VDE 0185-305-4): 2006-11 Protection against lightning, Part 4: Electrical and electronic systems within structures IEC 60364-4-44: 2001-08 Electrical installations of buildings; Part 4-44 IEC 60362-5-53: 2001-08 Electrical installations of buildings; Part 5-53 Procedures for risk evaluation are described in IEC 62305-2. 2.8.2 Planning of Lightning and Overvoltage Protection Installations Lightning and overvoltage protection should be taken into planning considerations (preliminary draft) of a building or reconstruction project at an early stage. In order to protect building installations against the direct impact of strikes of lightning, a ligtning protection system is required comprising: Exterior lightning protection Interior lightning protection Integration of building contract sections – planning, support, inspection A tailored combination of individual protection measures may be chosen from the options listed below, in order to protect a building and all of its installed electrical and electronic systems against the impact of lightning electrommagnetic pulses (LEMP): Cable routing and screening Equipotential bonding Room shielding Grounding Table 2.8/1 exemplifies recommendations on grounding, equipotential bonding, lightning protection and overvoltage protection measures for various building contract sections. Additional overvoltage protection measures may be necessary for the power supply and IT despite the existence of a lightning protection system. The basis for rating and and planning lightning and overvoltage protection systems is a definition of the building’s endangerment level. This definition must be made in compliance with DIN EN 50164-2. Lightning protection zones (LPZ) must be defined on the basis of building layout drawings and a categorization of the technical building installations. Appropriate measures for protection against strikes of lightning and/or overvoltages must be implemented at every zone transition area. To do this, every zone is allocated its own equipotential bonding rail. These rails must be connected to the grounding system via the grounded main equipotential rail. The most important objective is the protection of human life. Technical building system functions and system availability for use are of secondary importance in this context. Based on these priorities, a protection zone concept needs to be established for the building facility in compliance with DIN EN 50164-3 and -4. Its characteristics are: Treatment of the grounding system Treatment of roof and facade areas Integration of the technical building installations Establishment of the protection zone concept within the building including zone-specific equipontential bonding systems, each of which being connected to the grounding system. Table 2.8/1: Recommendations on grounding, equipotential bonding, lightning protection and overvoltage protection measures, see next page. 2/62 Totally Integrated Power by Siemens Power System Cost group (KG) acc. to DIN 276 System name Freshwater supply Drinking water supply Rainwater supply Sanitary systems (KG 410) Water supply for fire quenching Ventilation Lifting gear Collector/ separator systems/ gulleys Draining Piping Gas supply District heating supply Solar collectors Chimney system Heating systems Air intake (KG 420) Outdoor sensors/ actuators Outdoor tanks Air heat pumps Piping Roof mounting constructions Wall-mounted constructions Geothermal heat exchanger Installations in air (KG 430) Light domes Smoke evacuation systems Rotary heat exchangers Canal system MV building supply LV building supply LV installations Photovoltaic systems Electrical installations (KG 440) Paths/access ways External fire extinguishing system Billboards Shutter systems Sun shields Outdoor sensors/ actuators Telecom supply RF supply Satellite system Telecommunica- Antenna systems tions and IT Mobile radio communications systems Burglar alarm system Alarm system Bell/intercom Hauling/ conveyor Elevators systems (KG 460) Escalators Grounding / equipotential bonding X X X X X X X X X X)) X)) X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X included in the low-voltage installations included in the low-voltage installations X X) X) X X X) X) X) X) X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X) X X X X X X X X X X X X X X X X X X X X X X X Lightning protection (type 1) Overvoltage protection (type 2) Overvoltage protection (type 3) Overvoltage protection in IT systems x Recommended x) Required if a lightning protection system exists x)) Cathode-protected tank and piping systems must not be directly grounded, they must be integrated in the equipotential bonding and grounding systems by means of a series gap. 2/63 2 Besides an integration of the reinforcement steel girders and all of the canal, conduit, piping and cable support systems made of conductive materials into the equipotential bonding system, an EMC-suitable layout of the building installations is required. New installations must always be equipped with a concrete-footed ground electrode (DIN 18014). This electrode must be connected with the reinforcement (by clamping or welding) at regular distances of about 5 m in such a way that it can carry lightning currents. Existing building installations without a grounding system of its own must be retrofitted with ring ground electrodes or buried ground rods – or a combination thereof, which must be integrated in the equipotential bonding system. Electrical power distribution To meet the requirement of establishing protection zones for all cabling systems which intersect protection zone borders, suitable overvoltage protection measures must be planned and implemented. across the building, this mass potential is to be treated separately as a live conductor. Cable routing outside buildings Lines and cables leading to technical installations outside the building must be included in the LPZ framework of zone-specific equipotential bonding at the transition areas of the lightning protection zones, which is implemented by means of overvoltage protection devices. For this purpose, the overvoltage protection devices required must be connected to the building’s equipotential bonding system close to their mounting location. As few cable entry points into the building as possible should be planned. 2.8.3. Implementing Lightning and Overvoltage Protection Installations Exterior lightning protection Roof areas are often used as “technology platforms” for large-size equipment. In compliance with DIN EN 50164-3, these roof mounting constructions are often protected against direct strikes of lightning by means of separate lightning rods and roof conductors. Three methods may be applied to determine the protection category (Fig. 2.8/1): Mesh width Cabling Cable routing in buildings Cables and lines inside a building must be routed separately, split according to their voltage levels. If the reference potential of auxiliary supplies, e.g. 24 V DC systems, are permanently grounded, only one grounding connection is permissible per system. With more than one grounding connection in such systems there would be the risk of malfunctions or even total destruction. If such systems, which are merely grounded at the central grounding point, are spread at a large scale Lightning rod h1 h Protection angle 1 r Cover Lightning ball Grounding system Fig. 2.8/1: Methods for determining the protection class (source: VDE) 2/64 Totally Integrated Power by Siemens Power System Lightning ball method Meshing method Protection angle method Cable bushings penetrating the roof should be avoided. For this reason, it cannot be avoided to route supply lines on the roof across longer distances. These lines must be protected against direct strikes of lightning across their full length by means of lightning rods and roof conductors. Sufficient isolating space must be maintained between them. Power cables to the roof mounting constructions must be equipped with electromagnetic screening. The screen is to be laid on both sides. Connections of current discharge lines If the lightning protection equipotentializer is only connected to a single grounding electrode, there may be high potential differences to the other grounding electrodes. For this reason, current discharge lines must be connected with each other at ground level (i.e. close to soil). This connection should be made outside the building. What applies to all these connecting lines is that the length of current paths should be kept as short as possible. They should not be installed above a height of 1 m above ground. Minimum dimensions and materials of overhead connecting lines outside buildings are defined in DIN EN 62305-3. Equipotential bonding and grounding Equipotential bonding Owing to technical progress, an increasing number of electrical equipment is installed in buildings, therefore DIN VDE 0100-410 calls for equipotential bonding. The following conductive parts shall be connected: Connection lug of the concretefooted ground electrode Main protective conductor (PE conductor in the TT system, PEN conductor in the TN system) Water pipe Gas pipe (behind the water meter) Metal air pipes LPZ 0 A LEMP LPZ 0 B M LPZ 1 Room shield Ventilation LPZ 3 LEMP LPZ 2 LPZ 0 B LPZ 0 B LPZ 2 LEMP Terminal IT network SEMP Equipotential bonding as lightning protection, lightning current arrester Local equipotential bonding, surge arrester Power system LEMP: Lightning Electromagnetic Pulse; SEMP: Switching Electromagnetic Pulse; LPZ: Lightning Protection Zone Fig. 2.8/2: The concept of lightning protection zones 2/65 2 Metal waste water and rainwater pipes Heating pipes Cooling pipe Other metal piping Metal rails Antenna systems Telecommunications system Lightning protection systems An additional equipotential bonding conductor is required for bathrooms and shower rooms. Several pipes may be interconnected and connected to the equipotential bonding rail via a common main equipotential bonding conductor. The main equipotential bonding conductor must be half the cross section of the main protective conductor, but at least 6 mm2 Cu, maximum cross section of 25 mm2 Cu. Regional regulations must be observed. The main equipotential bonding rail should be laid in the building’s service entrance room, and this is where the main equipotential bonding conductors and the connection lug of the concrete-footed ground electrode are connected to it. DIN VDE 0100-7 requires additional equipotential bonding in rooms with special hazards for people. All conductive metal pipes and the conductive outlets of bath- and shower tubs must be connected to an equipotential bonding conductor with a minimum cross section of 4 mm2 Cu. Connection with the equipotential bonding busbar is made with a conductor cross section of at least 6 mm2 Cu. Parallel running, metal cable support systems should be connected at regular intervals (ideally 5 m). Grounding Two types of arrangements for grounding electrodes, type A and B, are distinguished. Arrangement type A consists of horizontal or vertical single grounding electrodes. Arrangement type A requires at least 2 grounding electrodes. Buried grounding rods are normally used in practice. Arrangement type B consist of a ring grounding conductor outside the building/facility, with a minimum of 80% of its total lenght being buried in the ground, or it could be a concrete-footed ground electrode. Mesh widths of a concrete-footed ground electrode should not be more than 20 m x 20 m. Interior lightning protection Lightning protection zones are defined protection areas which are classified according to the degree of endangerment by lightning strikes. Equipotential bonding must be implemented at the borders of these ligthning protection zones for all metal parts and electrical supply lines entering the zone. Equipotential bonding for lightning protection from LPZ 0 to LPZ 1 must be performed for all metal systems and electric power and data lines. The aim of equipotential bonding is to reduce potential differences caused by a lightning current. Requirements on equipotential bonding for lightning protection are fulfilled by a direct connection of all metal systems and the indirect connection of all live systems by means of overvoltage protection devices, type 1. Equipotential bonding for lightning protection should be implemented as closely as possible near the service entrance into the building, in order to prevent the ingress of partial lightning currents into the building. At the lightning protection zone LPZ 2 (e.g. subdistribution boards), coordinated overvoltage protection devices type 2 must be series-connected down the line of overvoltage protection devices type 1. DIN VDE 0100-534 requires that the length of connecting lines to overvoltage protection devices in branch circuits must not be more than 0.5 m. 2/66 Totally Integrated Power by Siemens Medium Voltage chapter 3 3.1 Introduction 3.2 Basics of Switching Devices 3.3 Requirements on Medium-Voltage Switchgear 3.4 Siemens Medium-Voltage Switchgear 3.5 From Medium-Voltage Switchgear to Turnkey Solutions 3.6 Protection of Power Distribution Systems and Switchgear 3 Medium Voltage 3.1 Introduction According to international rules, there are only two voltage groups: Low voltage: up to and including 1 kV AC (or 1,500 V DC) High voltage: above 1 kV AC (or 1,500 V DC) Most electrical appliances used in household, commercial and industrial applications work with low voltage. High voltage is used not only to transmit electrical energy over very large distances, but also, finely branched, for regional distribution to the load centers. However, as different high voltages are used for transmission and regional distribution, and since the tasks and requirements of the switchgear and substations are also very different, the term "medium voltage" has come to be used for the voltages required for regional power distribution, as a part of the highvoltage range above 1 kV AC up to and including 52 kV AC. Most operating voltages in medium-voltage systems are in the 3 kV AC to 40.5 kV AC range. The electrical transmission and distribution systems not only connect power stations and electricity consumers, but also, with their “meshed systems”, form a supraregional backbone with reserves for reliable supply and for the compensation of load differences. High operating voltages (and therefore low currents) are preferred for the power transmission in order to minimize losses. The voltage is not transformed to the usual values of the low-voltage system until it reaches the load centers close to the consumer. In public power supplies, the majority of medium-voltage systems are operated in the 10 kV to 30 kV range Low voltage Medium voltage 1 kV < 52 kV High voltage 0 1 kV 52 kV Alternating voltage Fig. 3.1/1: Voltage definitions (operating voltage). The values vary greatly from country to country, depending on the historical development of technology and the local conditions. Medium-voltage equipment Apart from the public supply, there are still other voltages fulfilling the needs of consumers in industrial plants with medium-voltage systems; in most cases, the operating voltages of the motors installed are decisive. Operating voltages between 3 kV and 15 kV are frequently found in industrial supply systems. In power supply and distribution systems, mediumvoltage equipment is available in power stations, for generators and station supply systems, in transformer substations of the primary distribution level (public supply systems or systems of large industrial companies), in which power supplied from the highvoltage system is transformed to medium voltage, in local supply, transformer or customer transfer substations for large consumers (secondary distribution level), in which the power is transformed from medium to low voltage and distributed to the end consumer (Fig. 3.1/3). 1 2 1 3 1 Medium voltage 2 High voltage 3 Low voltage Fig. 3.1/2: Voltage levels from the power plant to the consumer 3/2 Totally Integrated Power by Siemens Medium Voltage Disconnectors (isolators) G Medium voltage G Power generation are used for no-load closing and opening operations. Their function is to “isolate” downstream devices so they can be worked on. Switch-disconnectors (load break switches) High voltage Power transmission are the combination of a switch and a disconnector, or a switch with isolating distance. Contactors are load breaking devices with a limited short-circuit making or breaking capacity. They are used for high switching rates. Earthing switches Transformer substation Primary distribution level Medium voltage M Secondary distribution level earth isolated circuits. Make-proof earthing switches (earthing switches with making capacity) are used for the safe earthing of circuits, even if voltage is present, i.e. also in the event that the circuit to be earthed was accidentally not isolated. Fuses consist of a fuse base and a fuse link. With the fuse base, an isolating distance can be established when the fuse link is pulled out in de-energized condition (like in a disconnector). The fuse link is used for one single breaking of a short-circuit current. Surge arresters discharge loads caused by lightning strikes (external overvoltages) or switching operations and earth faults (internal overvoltages) to earth. They therefore protect the connected equipment against impermissibly high voltages. Low voltage Fig. 3.1/3: Medium voltage in the power supply and distribution system 3.2 Basics of Switching Devices 3.2.1 What are switching devices? Switching devices are devices used to close (make) or open (break) electrical circuits. The following stress can occur during making and breaking: No-load switching Breaking of operating currents Breaking of short-circuit currents 3.2.2 What can the different switching devices do? Circuit-breakers can make and break all currents within the scope of their ratings, from small inductive and capacitive load currents up to the full short-circuit current, and this under all fault conditions in the power supply system, such as earth faults, phase opposition, etc. Switches can switch currents up to their rated normal current and make on existing short circuits (up to their rated shortcircuit making current). 3/3 3 3.2.3 Selection of switching devices Switching devices are selected both according to their ratings and according to the switching duties to be performed, which also includes the switching rates. The following tables illustrate these selection criteria: Table 3.1/1 shows the selection according to ratings. Tables 3.1/2 to 3.1/5 show the service life of the devices. Selection according to ratings The system conditions, i.e. the properties of the primary circuit, determine the required parameters. The most important of these are: Rated voltage is the upper limit of the system voltage the device is designed for. As all high-voltage switching devices are zero-current interrupters – except for some fuses – the system voltage is the most important dimensioning criterion. It determines the dielectric stress of the switching device by means of the transient recovery voltage and the recovery voltage, especially while switching off. Rated insulation level is the dielectric strength from phase to earth, between phases and across the open contact gap, or across the isolating distance. The dielectric strength is the capability of an electrical component to withstand all voltages with a specific time sequence up to the magnitude of the corresponding withstand voltages. These can be operating voltages or higher-frequency voltages caused by switching operations, earth faults (internal overvoltages) or lightning strikes (external overvoltages). The dielectric strength is verified by a lightning impulse withstand voltage test with the standard impulse wave of 1.2/50 µs and a power-frequency withstand voltage test (50 Hz / 1 min). Rated normal current is the current the main circuit of a device can continuously carry under defined conditions. The temperature rise of components – especially contacts – must not exceed defined values. Permissible temperature rises Device insulation level Circuit-breaker Switch(-disconnector) Disconnector Earthing switch Make-proof earthing switch Contactor Fuse link Fuse base Surge arrester* Current limiting reactor Bushing Post insulator (insulator) x x 2) x x x x x x x x x Withstand capability, rated … voltage x x normal current x x x x x x x x x x x x 3) x x x 4) x x 6) x 6) x x peak withstand current Switching capacity, rated … breaking current short-circuit breaking current x short-circuit making current x x x x 1) x x 1) x 5) x Selection parameter 1) Limited short-circuit breaking capacity 2) Applicable as selection parameter in special cases only, e.g. for exceptional pollution layer 3) For surge arresters with spark gap = rated voltage Rated discharge current for surge arresters For surge arresters: Short-circuit strength in case of overload 6) For bushings and insulators: Minimum failing loads for tension, bending and torsion * See also Section 3.3 5) 4) (Parameters of the secondary equipment for drives, control and monitoring are not taken into consideration in this table.) Table 3.2/1: Device selection according to data of the primary circuit 3/4 Totally Integrated Power by Siemens Medium Voltage always refer to the ambient air temperature. If a device is mounted in an enclosure, it may possibly not be loaded with its full rated current, depending on the quality of heat dissipation. Rated peak withstand current is the peak value of the major loop of the short-circuit current during a compensation process after the beginning of the current flow, which the device can carry in closed state. It is a measure for the electrodynamic (mechanical) load of an electrical component. For devices with full making capacity, this value is not relevant (see Rated short-circuit making current). Rated short-circuit making current is the peak value of the making current in case of short circuit at the terminals of the switching device. This stress is greater than that of the rated peak withstand current, as dynamic forces may work against the contact movement. Rated breaking current is the load breaking current in normal operation. For devices with full breaking capacity and without a critical current range, this value is not relevant (see Rated short-circuit breaking current). Rated short-circuit breaking current is the root-mean-square value of the breaking current in case of short circuit at the terminals of the switching device. Class M1 M M2 E1 Operating cycles 1,000 5,000 10 x I1 10 x I2a 2 x Ima 30 x I1 20 x I2a 3 x Ima 100 x I1 20 x I2a 5 x Ima Description Mechanical endurance Increased mechanical endurance 20 x 0.05 · I1 10 x I4a 10 x 0.2 … 0,4 · I4a 10 x I4b 10 x I6a 10 x I6b I1 I2a I4a I4b I6a I6b mainly active load current closed loop current cable-charging current line-charging current earth-fault current cable-charging and linecharging current under earth-fault conditions short-circuit making current E2 E E3 Ima Table 3.2/2: Endurance classes for switches Selection according to endurance and switching rates If several devices satisfy the electrical requirements and no further criteria are more important, the required switching rate can be used as an additional selection criterion. The following tables show the endurance of the switching devices and therefore provide a recommendation for their appropriate use. The respective device standards distinguish between classes of mechanical (M) and electrical (E) endurance, whereby they can also be used together on the same switching device; for example, a switching device can have both mechanical class M1 and electrical class E3. Switches Standard IEC 60265-1 / VDE 0670-301 only specifies classes for the so-called general-purpose switches. There are also “Special switches” and “Switches for limited applications”.* – General-purpose switches must be able to switch different types of operating currents (load currents, ring currents, currents of unloaded transformers, charging currents of unloaded cables and overhead lines) as well as make on short-circuit currents. General-purpose switches that are intended for use in systems with isolated neutral or with earth fault compensation, must also be able to switch under earth fault conditions. The versatility is mirrored in the very exact specifications for the E classes. – SF6 switches are appropriate when the switching rate is ≤ once a month. These switches are usually classified as E3 with regard to their electrical endurance. * Switches for limited applications must only control some of the switching duties of a general-purpose switch. Switches for special applications are provided for switching duties such as switching of single capacitor banks, paralleling of capacitor banks, switching of ring circuits formed by transformers connected in parallel, or switching of motors in normal and locked condition. 3/5 3 Class M1 M M2 E1 E2 E Description 2,000 operating cycles 10,000 operating cycles 2 x C and 3 x O with 10%, 30%, 60% and 100% Isc 2 x C and 3 x O with 10%, 30%, 60% and 100% Isc 26 x C 26 x C 4xC 4xC 130 x O 130 x O 8xO 6xO 10% Isc 30% Isc 6% Isc 100% Isc Normal mechanical endurance Extended mechanical endurance, low maintenance Normal electrical endurance (Switch which is not covered by E2) Without AR* operation Without AR* operation Extended electrical endurance without maintenance of the arcing chamber Circuit-breakers Whereas the number of mechanical operating cycles is specifically stated in the M classes, the circuit-breaker standard IEC 62271-100 / VDE 0671100 does not define the electrical endurance of the E classes by specific numbers of operating cycles, but remains very vague on this. The test duties of the short-circuit type tests provide an orientation as to what is meant by “normal electrical endurance” and “extended electrical endurance”. The number of make and break operations (Close, Open) is specified in the fields of the table with a gray background. Modern vacuum circuit-breakers can generally make and break the rated normal current with the number of mechanical operating cycles. The switching rate is not a determining selection criterion, as circuitbreakers are always used where shortcircuit breaking capacity is required to protect equipment. Disconnectors Disconnectors do not have any switching capacity.* Therefore, classes are only specified for the number of mechanical operating cycles. Earthing switches With earthing switches, the E classes designate the short-circuit making capacity (earthing on applied voltage). E0 corresponds to a normal earthing switch; switches of the E1 and E2 classes are also called makeproof or high-speed earthing switches. The standard does not specify how often an earthing switch can be * AR = automatic reclosing Table 3.2/3: Endurance classes for circuit-breakers – Air-break or hard-gas switches are appropriate when the switching rate is ≤ once a year. These switches are simpler and usually belong to the E1 class. There are also E2 versions available. – Vacuum switches Their switching capacity is significantly higher than that of the M2/E3 classes. They are used for special tasks – mostly in industrial power supply systems – or when the switching rate is ≥ 1 once a week. Class M0 M M1 M2 Operating cycles 1,000 2,000 10,000 Description For general requirements Extended mechanical endurance Table 3.2/4: Endurance classes for disconnectors Class E0 E1 E2 Operating cycles 0 x Ima 2 x Ima 5 x Ima Description No short-circuit making capacity Short-circuit making capacity Reduced maintenance required For general requirements E Table 3.2/5: Endurance classes for earthing switches * Disconnectors up to 52 kV may only switch negligible currents up to 500 mA (e.g. voltage transformer) or larger currents only when there is an insignificant voltage difference (e.g. during busbar transfer when the bus coupler is closed). 3/6 Totally Integrated Power by Siemens Medium Voltage actuated purely mechanically; there are no M classes for these switches. Contactors The standard has not specified any endurance classes for contactors yet. Commonly used contactors today have a mechanical and electrical endurance in the range of 250,000 to 1,000,000 operating cycles. They are used wherever switching operations are performed very frequently, e.g. > once an hour. System parameters • • • • Rated voltage Short-circuit current Normal current Load flow • • • • Neutral earthing Cable / overhead line Overvoltage protection Power quality System protection and measuring • Protection functions • Selectivity • Measuring • Redundancy • Tripping times • Metering Supplies • Public power systems • Emergency power • In-plant power generation • Redundancy • Place of installation • Utilities room • Transport • Accessibility • Buildings • Installation Service location 3.3 Requirements on Medium-Voltage Switchgear The major influences and stress values a switchgear assembly is subject to result from the task and its rank in the distribution system. These influencing factors and stresses determine the selection parameters and ratings of the switchgear. Ambient conditions • Room climate • Temperature • Altitude • Air humidity Sector-specific application • Switching duties • Busbar transfer • Operation • Working • Inspection • Switching rate • Availability • Personal protection • Work instructions • Maintenance Sector-specific operating procedures Regulations • Standards • Laws • Association guidelines • Company regulations 3.3.1 Influences and stress values System parameters System voltage It determines the rated voltage of the switchgear, switching devices and other installed components. The maximum system voltage at the upper tolerance limit is the deciding factor. Assigned configuration criteria for switchgear Rated voltage Ur Rated insulation level Ud; Up Rated primary voltage of voltage transformers Upr Fig. 3.3/1: Influencing factors and stresses on the switchgear Short-circuit current It is characterized by the electrical values of peak withstand current Ip (peak value of the initial symmetrical short-circuit current) and sustained short-circuit current Ik. The required short-circuit current level in the system is predetermined by the dynamic response of the loads and the power quality to be maintained, and determines the making and breaking capacity and the withstand capability of the switching devices and the switchgear (Table 3.3/1). Attention: The ratio of peak current to sustained short-circuit current in the system can be significantly larger than the standardized factor Ip /Ik = 2.5 (50 Hz), used for the construction of the switching devices and the switchgear. A possible cause, for example, are motors that feed power back to the system when a short circuit occurs, thus increasing the peak current significantly. 3/7 3 Assigned configuration criteria for switchgear Main and earthing circuits Switching devices Current transformers – Rated peak withstand current Ip – Rated short-time withstand current Ik – Rated short-circuit making current Ima – Rated short-circuit breaking current Isc – Rated peak withstand current Ik dyn – Rated short-time thermal current Ith Table 3.3/1: Configuration criteria for short-circuit current Normal current and load flow The normal current refers to current paths of the incoming feeders, busbar(s) and outgoing consumer feeders. Because of the spatial arrangement of the panels, the current is also distributed and therefore there may be different rated current values next to one another along a conducting path; different values for busbars and feeders are typical. Reserves must be planned when dimensioning the switchgear, e.g. in accordance with the ambient air temperature, for planned overload or temporary overload during faults. Large cable cross sections or several parallel cables must be connected for high normal currents; the panel connection must be designed accordingly. Assigned configuration criteria for switchgear Rated current of busbar(s) and feeders Number of cables per phase in the panel (parallel cables) Current transformer ratings. 3/8 Totally Integrated Power by Siemens Medium Voltage 3.4 Siemens Medium-Voltage Switchgear As described on page 5/2 in the TIP Application Manual “Establishment of Basic Data and Preliminary Planning”, the 8DH switchgear is the right choice for the majority of applications in infrastructure projects. In this TIP Manual for Draft Planning, we would like to present some advanced products and solutions. For more detailed information, please contact your local Siemens representative. Loss of service continuity category LSC 1 When an accessible compartment of the switchgear is opened … the busbar and therefore the complete switchgear must be isolated. Type of construction No partitions within the panel, no panel separation walls to adjacent panels. Panel separation walls and isolating distance with partition to the busbar. LSC 2 LSC 2A the incoming cable must be isolated. The busbar and the adjacent switchgear panels can remain in operation. the incoming cable, the busbar and the adjacent switchgear panels can remain in operation. LSC 2B Panel separation walls and isolating distance with partition to the busbar and to the cable. Table 3.4/1: Loss of service continuity categories Type of accessibility to a compartment Interlock-controlled Access features Opening for normal operation and maintenance, e.g. fuse replacement. Opening for normal operation or maintenance, e.g. fuse replacement. Opening not for normal operation and maintenance, e.g. cable testing. Type of construction Access is controlled by the construction of the switchgear, i.e. integrated interlocks prevent impermissible opening. Access control via a suitable procedure (work instruction of the operator) combined with a locking device (lock). Access only with tool for opening, special access procedure (instruction of the operator). Procedure-based Tool-based Not accessible Opening not possible / not intended for operator, opening can destroy the compartment. This applies generally to the gas-filled compartments of gas-insulated switchgear. As the switchgear is maintenance-free and climate-independent, access is neither required nor possible. Table 3.4/2: Accessibility of compartments The notation IAC A FLR, I and t contains the abbreviations for the following values: IAC A FLR I t Internal Arc Classification Distance between the indicators 300 mm, i.e. installation in rooms with access for authorized personnel, closed electrical service location. Access from the front (F), from the sides (L = lateral) and from the rear (R). Test current = rated short-circuit breaking current (in kA) Arc duration (in s) Table 3.4/3: Internal arc classification according to IEC 62271-200 3/9 3 3/10 Loss of service continuity Busbar system 1s 3s 31.5 25 25 2,500 2,500 2,500 2,500 2,000 1,250 PM Single 24.0 25 25 PM IAC A FLR 25 kA, 1s NXPLUS C Double 24 31.5 LSC 2B (panels without HV HRC fuses) LSC 2A (panels with HV HRC fuses) LSC 2B (panels without HV HRC fuses) LSC 2A (panels with HV HRC fuses) LSC 2B LSC 2B LSC 2B LSC 2B LSC 2B LSC 2B PM PM PM PM PM PM PM PM PM PM IAC A FL 21 kA, 1s 8DJ10 IAC A FL 16 kA, 1s 8BT3 IAC A FL 31,5 kA, 1s 8BT2 Single Single Single IAC A FLR 25 kA, 1s 8BT1 Single IAC A FLR 31,5 kA, 1s SIMOPRIME Single IAC A FLR 50 kA, 1s NXAIR P Double 15 17.5 24 36 36 17.5 24 PM IAC A FL 21 kA, 1s 8DJ20 Single 17.5 24 PM IAC A FLR 21 kA, 1s 8DH10 Single 17.5 24 PM IAC A FLR 20 kA, 1s SIMOSEC Single 17.5 24 IAC A FLR 50 kA, 1s NXAIR P Single 15 IAC A FLR 25 kA, 1s NXAIR M Double 24 IAC A FLR 25 kA, 1s NXAIR M Single 24 25 25 50 50 31.5 25 31.5 16 25 20 25 20 25 20 25 20 IAC A FLR 40 kA, 1s NXAIR Double 12 40 LSC 2B LSC 2B LSC 2B LSC 2B LSC 2B LSC 2A LSC 2B LSC 1 PM IAC A FLR 40 kA, 1s NXAIR Single 12 40 PM IAC A FL 40 kA, 1s 8DB10 Double 40.5 40 40 40 40 25 25 50 50 31.5 25 31.5 16 20 20 20 20 20 20 20 20 PM IAC A FL 40 kA, 1s 8DA10 Single 40.5 40 40 PM IAC A FLR 31,5 kA, 1s NXPLUS Double 36 31.5 31.5 PM IAC A FLR 31,5 kA, 1s NXPLUS Single 40.5 31.5 31.5 2,500 2,500 4,000 4,000 3,150 3,150 2,500 2,500 4,000 4,000 3,150 2,000 2,500 1,250 630 630 630 630 1,250 1,250 1,250 1,250 IAC A FLR 31,5 kA, 1s NXPLUS C 15 Rated current, feeder (A) Partition class Internal arc classification* Switchgear type Rated voltage (kV) Rated short-time withstand current (kA) Rated current, busbar (A) 2,500 2,500 2,500 2,500 3,150 3,150 2,500 2,500 4,000 4,000 3,150 2,000 2,500 1,250 630 630 630 630 1,250 1,250 1,250 1,250 LSC 2B (panels without HV HRC fuses) LSC 2A (panels with HV HRC fuses) LSC 2B (panels without HV HRC fuses) LSC 2A (panels with HV HRC fuses) LSC 2B (panels without HV HRC fuses) LSC 2A (panels with HV HRC fuses) LSC 2B (panels without HV HRC fuses) LSC 2A (panels with HV HRC fuses) Distribution level Insulation Type of construction Primary Gasinsulated Extendible Table 3.4/4: Overview of Siemens medium-voltage switchgear Totally Integrated Power by Siemens Airinsulated Extendible Secondary Gasinsulated Nonextendible Extendible Airinsulated Extendible * Maximum possible IAC classification Medium Voltage NXAIR Performance features The air-insulated, metal-clad switchgear type NXAIR is the innovation in the switchgear field for the distribution and process level up to 12 kV, 40 kA, 3150 A. Metal-enclosed, metal-clad LSC 2B PM switchgear Resistance to internal faults: IAC A FLR 40 kA, 1 s Type tests of the circuit-breaker and make-proof earthing switch in the panel Cable connection from the front or from the rear Bushing-type transformers enable selective shutdown of feeders Confinement of internal fault to respective compartment Replacement of module and connection compartment possible Modular contactor panels Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current** peak withstand current** normal current of the busbark normal current of the feeders with circuit-breaker with switch-disconnector*** kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 40 max. kA 40 max. kA 100 max. kA 100 max. Ak 3,150 max. Ak 3,150 max. Ak 200 12 50/60 28 * 75 40 40 100 100 3,150 3,150 200 * 42 kV optional ** Values for 50 Hz *** Depending on the rated current of the HV HRC fuses used Table 3.4/5: Technical data of NXAIR TIP_NXAIR-001 H3 H1 H2 W D All panel types Width Height W H1 H2 Standard – For higher low-voltage compartment – For natural ventilation – With additional compartment for busbar components Height of standard low-voltage compartment Single busbar Double busbar ≤ 31.5 kA, ≤ 2,500 A 40 kA, 3,150 A D ≤ 31.5 kA, ≤ 2,500 A 40 kA, 3,150 A Fig. 3.4/1: NXAIR panel Table 3.4/6: Dimensions of NXAIR Dimensions in mm 400 / 600 / 800 / 1,000 2,300 2,350 H3 Depth D 2,000 1,350 1,450 2,850 3,050 3/11 3 NXAIR M Performance features The air-insulated, metal-clad switchgear type NXAIR M is the consequent further development of the NXAIR family for use in the distribution and process level up to 24 kV, 25 kA, 2,500 A. Metal-enclosed, metal-clad LSC 2B PM switchgear Resistance to internal faults: IAC A FLR 25 kA, 1 s Type tests of the circuit-breaker and make-proof earthing switch in the panel Cable connection from the front or from the rear Bushing-type transformers enable selective shutdown of feeders Confinement of internal fault to respective compartment Replacement of module and connection compartment possible Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbark normal current of the feeders with circuit-breaker with switch-disconnector * Depending on the rated current of the HV HRC fuses used Table 3.4/7: Technical data of NXAIR M kV 24 Hz 50 kV 50 kV 125 max. kA 25 max. kA 25 max. kA 63 max. kA 63 max. Ak 2,500 max. Ak 2,500 max. Ak 200* TIP_NXAIR-M-001 H3 H2 H1 H4 W D All panel types Width W ≤ 1,600 A 2,000, 2,500 A Height H1 H2 H3 H4 Depth D With standard low-voltage compartment – For natural ventilation Front for standard low-voltage compartment – For higher low-voltage compartment – With additional compartment for busbar components Single busbar Double busbar for back-to-back arrangement Dimensions in mm 800 1,000 2,655 2,200 2,550 2,770 1,554 3,,260 Fig. 3.4/2: NXAIR M panel Table 3.4/8: Dimensions of NXAIR M 3/12 Totally Integrated Power by Siemens Medium Voltage NXAIR P Performance features The air-insulated, metal-clad switchgear type NXAIR P is based on the construction principles of the NXAIR family and designed for use in the distribution and process level up to 15 kV, 50 kA, 4000 A. Metal-enclosed, metal-clad LSC 2B PM switchgear Resistance to internal faults: IAC A FLR 50 kA, 1 s Type tests of the circuit-breaker and make-proof earthing switch in the panel Cable connection from the front or from the rear Can be delivered as withdrawable or truck-type switchgear Bushing-type transformers enable selective shutdown of feeders up to 31.5 kA Confinement of internal fault to respective compartment up to 31.5 kA Replacement of module and connection compartment is possible Modular contactor panels H1 H2 H3 H4 Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current* peak withstand current* normal current of the busbark normal current of the feeders with circuit-breaker with vacuum contactor kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 50 max. kA 50 max. kA 125 max. kA 125 max. Ak 4,000 max. Ak 4,000 max. Ak 400** 12 50/60 28 75 50 50 125 125 4,000 4,000 400** 15 50/60 35 95 50 50 125 125 4,000 4,000 – * Values for 50 Hz ** Depending on the rated current of the HV HRC fuses used Table 3.4/9: Technical data of NXAIR P HA25-2688d eps W D All panel types (except vacuum contactor panel) Width W ≤ 2,000 A > 2,000 A (for panel ventilation) Height H1 H2 H3 H4 Depth D Front for standard low-voltage compartment (≤ 3150 A) With higher low-voltage compartment With standard, top-mounted pressure relief duct For forced ventilation Single busbar Double busbar for back-to-back arrangement Vacuum contactor panel Width Height W H1 H2 H3 H4 Depth Fig. 3.4/3: NXAIR P panel D Front for standard low-voltage compartment (≤ 3150 A) With higher low-voltage compartment With standard, top-mounted pressure relief duct For forced ventilation (400 A) Single busbar Dimensions in mm 800 1,000 2,225 2,485 2,550 2,710 1,635 3,320 400 2,225 2,485 2,550 2,710 1,650 Table 3.4/10: Dimensions of NXAIR P 3/13 3 SIMOPRIME Performance features The air-insulated, metal-clad switchgear type SIMOPRIME is a factory-assembled, type-tested indoor switchgear for use in the distribution and process level up to 17.5 kV, 40 kA, 3600 A. Metal-enclosed, metal-clad LSC 2B PM switchgear Resistance to internal faults: IAC A FLR 40 kA, 1 s Type tests of the circuit-breaker and make-proof earthing switch in the panel Cable connection from the front or from the rear Truck-type design Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current** peak withstand current **k normal current of the busbar normal current of the feeders with circuit-breaker with switch-disconnector with vacuum contactor kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 40 max. kA 40 max. kA 100 max. kA 100 max. Ak 3,600 max. Ak 3,600 max. Ak 200*** max. Ak 400*** 12 50/60 28* 75 40 40 100 100 3,600 3,600 200*** 400*** 15 50/60 35 95 40 40 100 100 3,600 3,600 200*** 17.5 50/60 38 95 40 40 100 100 3,600 3,600 200*** – – * 42 kV optional ** Values for 50 Hz *** Depending on the rated current of the HV HRC fuses used Table 3.4/11: Technical data of SIMOPRIME All switching operations with closed door Logical mechanical interlocks HA26-2024a eps Use of block-type or ring-core current transformers H1 W H2 D All panel types Width W Circuit-breaker panel Vacuum contactor panel Disconnector panel Switch-disconnector/ fuse panel ≤ 1,250 A 2,500 A, 3,150 A, 3,600 A 12 kV 17.5 kV ≤ 1,250 A 2,500 A, 3,150 A, 3,600 A Dimensions in mm ≤ 31.5 kA 40 kA 600 800 400 600 800 600 600 600 800 600 800 600 2,200 2,437 1,780 1,860 800 800 800 800 800 800 800 Bus sectionalizer/circuit-breaker panel 1,250 A ≤ 2,500 A, 3,150 A, 3,600 A Bus sectionalizer/bus riser panel Metering panel Height H1 H2 Depth Fig. 3.4/4: SIMOPRIME panel D With standard low-voltage compartment and IAC 0.1 s With standard low-voltage compartment and IAC 1.0 s – Standard ≤ 2,500 A 3,150 A, 3,600 A Table 3.4/12: Dimensions of SIMOPRIME 3/14 Totally Integrated Power by Siemens Medium Voltage 8BT1 Performance features The air-insulated, cubicle-type switchgear type 8BT1 is a factoryassembled, type-tested indoor switchgear for lower ratings in the distribution and process level up to 24 kV, 25 kA, 2,000 A. Metal-enclosed, LSC 2A PM cubicle switchgear Type tests of the circuit-breaker and make-proof earthing switch in the panel Tested for resistance to internal faults: IAC A FLR 25 kA, 1 s Circuit-breaker panel, fixedmounted switch-disconnector panel, modular Cable connection from the front HA26-2029a eps Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbark normal current of the feeders with circuit-breaker or disconnector truck with switch-disconnector kV 12 Hz 50 kV 28 kV 75 max. kA 25 max. kA 25 max. kA 63 max. kA 63 max. Ak 2,000 max. Ak 2,000 max. Ak 630 A / 200 A* 24 50 50 125 25 25 63 63 2,000 2,000 630 A / 200 A* * Depending on the rated current of the HV HRC fuses used Table 3.4/13: Technical data of 8BT1 Truck-type design Use of block-type current transformers All switching operations with closed door Use of SION vacuum circuit-breakers W H1 Logical mechanical interlocks H2 D1 D2 Dimensions in mm All panel types 7.2/12 kV Width W For circuit-breaker max. 1,250 A For circuit-breaker 2,000 A For switch-disconnector With standard low-voltage compartment With cable duct* Without low-voltage compartment With low-voltage compartment 600 800 600 2,050 2,350 1,200 1,410 Height Depth 24 kV Width H1 H2 D1 D2 W For circuit-breaker max. 1,250 A For circuit-breaker 2,000 A For switch-disconnector With standard low-voltage compartment With cable duct* Without low-voltage compartment With low-voltage compartment 800 1,000 800 2,050 2,350 1,200 1,410 Height Depth H1 H2 D1 D2 * For 1 s arc duration Fig. 3.4/5: 8BT1 panel Table 3.4/14: Dimensions of 8BT1 3/15 3 8BT2 Performance features The air-insulated, metal-clad switchgear type 8BT2 is a factoryassembled, type-tested indoor switchgear for use in the distribution and process level up to 36 kV, 25 kA, 2,500 A. LSC 2B PM switchgear Tested for resistance to internal faults: IAC A FLR 31.5 kA, 1 s Cable connection from the front Truck-type design Use of block-type current transformers All switching operations with closed door Logical mechanical interlocks Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbar normal current of the feeders with circuit-breaker with contactor with switch-disconnector Table 3.4/15: Technical data of 8BT2 kV 36 Hz 50/60 kV 70 kV 170 max. kA 31.5 max. kA 31.5 max. kA 80/82 max. kA 80/82 max. Ak 2,500 max. Ak 2,500 max. Ak – max. Ak – W H D All panel types Width Height W H ≤ 25 kA 31.5 kA Depth Fig. 3.4/6: 8BT2 switchgear D Dimensions in mm 1,550 2,400 2,775 2,450 Table 3.4/16: Dimensions of 8BT2 3/16 Totally Integrated Power by Siemens Medium Voltage 8BT3 Performance features The air-insulated, cubicle-type switchgear type 8BT3 is a factoryassembled, type-tested indoor switchgear for lower ratings in the distribution and process level up to 36 kV, 16 kA, 1,250 A. LSC 1 switchgear Tested for resistance to internal faults: IAC FLR 16 kA, 1 s Circuit-breaker panel, fixedmounted switch-disconnector panel, modular Cable connection from the front Truck-type design Use of block-type current transformers All switching operations with closed door Logical mechanical interlocks Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbar normal current of the feeders with circuit-breaker with contactor with switch-disconnector * Depending on the rated current of the HV HRC fuses used Table 3.4/17: Technical data of 8BT3 kV 36 Hz 50/60 kV 70 kV 170 max. kA 16 max. kA 16 max. kA 40/42 max. kA 40/42 max. Ak 1,250 max. Ak 1,250 max. Ak – max. Ak 400* W H D All panel types Width Height Depth Fig. 3.4/7: 8BT3 switchgear W H D Dimensions in mm 1,000 2,400 1,450 Table 3.4/18: Dimensions of 8BT3 3/17 3 8DJ10 The gas-insulated switchgear type 8DJ10 with switch-disconnectors is used for power distribution in the secondary distribution system up to 24 kV. With its extremely narrow design, block versions with up to six feeders can be used in all types of substations. Performance features: Type-tested according to IEC 62271-200 Sealed pressure system with SF6 filling for the entire service life Safe-to-touch enclosure and standardized connections for plug-in cable terminations Block-type construction, nonextendable Three-pole, gas-insulated switchgear vessel with threeposition switch, for connection of cable plugs Operating mechanisms located outside the switchgear vessel, easily accessible Metal-enclosed, partition class PM Loss of service continuity category for switchgear: – without HV HRC fuses: LSC 2B – with HV HRC fuses: LSC 2A Internal arc classification: IAC A FL 21 kA, 1 s No gas work during installation Advantages: Independent of the environment and climate Compact Maintenance-free High operating and personal safety Operational reliability Environmentally compatible Cost-efficient Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-time withstand current, 1 s short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the ring-main feeders normal current of the transformer feeders (depending on the HV HRC fuse link) * 42 kV / 75 kV according to some national requirements Table 3.4/19: Technical data of 8DJ10 kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 25 max. kA – max. kA 25 max. kA 63 A 630 A 200 12 50/60 28* 75 25 20 25 63 15 50/60 36 95 25 20 25 63 17.5 50/60 38 95 25 20 25 63 24 50/60 50 125 20 20 20 50 H1 H2 W Dimensions Width (module) W Connection method: 2RC + 1T (connection 10) 3RC + 1T (connection 71) 4RC + 2T (connection 62) Low design High design Standard switchgear TIP_8DJ10-2358_1a TIP_8DJ10-2355_1 D Dimensions in mm 710 1,060 1,410 1,360 1,650 775 880 Height H1 H2 Depth D Switchgear with pressure absorber Fig. 3.4/8: 8DJ10 switchgear Table 3.4/20: Internal arc classification according to IEC 62271-200 3/18 Totally Integrated Power by Siemens Medium Voltage 8DJ20 The gas-insulated medium-voltage switchgear type 8DJ20 is used for power distribution in the secondary distribution system up to 24 kV. Ringmain feeders, circuit-breaker feeders and transformer feeders are all part of a comprehensive product range in compact block-type construction to satisfy all requirements – also for extreme ambient conditions. Performance features: Type-tested according to IEC 62271-200 Sealed pressure system with SF6 filling for the entire service life Safe-to-touch enclosure and standardized connections for plug-in cable terminations Block-type construction, nonextendible Three-pole, gas-insulated switchgear vessel with threeposition switch, for connection of cable plugs Operating mechanisms located outside the switchgear vessel, easily accessible Metal enclosed, partition class PM Loss of service continuity category for switchgear: – without HV HRC fuses: LSC 2B – with HV HRC fuses: LSC 2A H1 H2 Internal arc classification: IAC A FL 21 kA, 1 s No gas work during installation Advantages: Independent of the environment and climate Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current for switchgear with circuit-breakers short-time withstand current, 1 s short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the ring-main feeders normal current of the circuit-breaker feeders normal current of the transformer feeders (depending on the HV HRC fuse link) kV 7.2 Compact Maintenance-free High operating and personal safety Environmentally compatible Cost-efficient 12 50/60 28* 75 20 25 20 25 63 15 50/60 36 95 16 25 20 25 63 17.5 50/60 38 95 16 25 20 25 63 24 50/60 50 125 16 20 20 20 50 Hz 50/60 kV 20 kV 60 max. kA 20 max. kA 25 max. kA – max. kA 25 max. kA 63 A 630 A 250 oder 630 A 200 * 42 kV / 75 kV according to some national requirements Table 3.4/21: Technical data of 8DJ20 TIP_8DJ20-LST-2420_1 H3 TIP_8DJ20-2337_4a W D Dimensions Width W Number of feeders (in extracts) 2 feeders (e.g. 2RC) 3 feeders (e.g. 2RC + 1T) 4 feeders (e.g. 3RC + 1T, 4RC) 5 feeders (e.g. 4RC + 1T, 5RC) Low overall height Standard overall height High structure (higher frame) Option: Low-voltage compartment, compartment height: Depth D Standard switchgear Switchgear with pressure absorber Dimensions in mm 710 1,060 1,410 1,760 1,200 1,400 1,760 400 or 600 775 880 Height H1 H2 H3 Fig. 3.4/9: 8DJ20 switchgear Table 3.4/22: Dimensions of 8DJ20 3/19 3 8DH10 The gas-insulated medium-voltage switchgear type 8DH10 is used for power distribution in secondary and primary distribution systems up to 24 kV. The product range includes individual panels such as ring-main, transformer and circuit-breaker panels or metering panels, as well as panel blocks to satisfy all requirements with the highest level of operational reliability. Performance features: Type-tested according to IEC 62271-200 Sealed pressure system with SF6 filling for the entire service life Safe-to-touch enclosure and standardized connections for plug-in cable terminations Single-pole insulated busbar Three-pole gas-insulated switchgear vessels with three-position switch, circuit-breaker and earthing switch, for connection of cable plugs Operating mechanisms and transformers located outside the switchgear vessel, easily accessible Metal-enclosed, partition class PM Loss of service continuity category for switchgear: – without HV HRC fuses: LSC 2B – with HV HRC fuses: LSC 2A Internal arc classification for: – Wall-standing arrangement: IAC A FL 21 kA, 1 s – Free-standing arrangement: IAC A FLR 21 kA, 1 s No gas work during installation or extension Advantages: Independent of the environment and climate Compact Maintenance-free Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 1 s short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbark normal current of the feeders kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 25 max. kA 25 max. kA – max. kA 25 max. kA 63 High operating and personal safety Operational reliability and security of investment Environmentally compatible Cost-efficient 12 50/60 28* 75 25 25 20 25 63 15 50/60 36 95 25 25 20 25 63 17.5 50/60 38 95 25 25 20 25 63 24 50/60 50 125 20 20 20 20 50 A 630 or 1,250 A 630 630 630 630 630 * 42 kV / 75 kV according to some national requirements Table 3.4/23: Technical data of 8DH10 H2 H1 H1 H2 TIP_8DH-2279_1 TIP_8DH-2282_1 TIP_8DH-2301_1a W W D Dimensions Width W Ring-main feeders Transformer feeders, circuit-breaker feeders, bus sectionalizer panels Metering panels Panel blocks Height Depth H1 H2 D Panels without low-voltage compartment Panels with low-voltage compartment Standard switchgear Switchgear with pressure absorber Dimensions in mm 350 500 850 700, 1,050, 1,400 1400 2,000 or 2,300 775 890 Fig. 3.4/10: 8DH10 switchgear Table 3.4/24: Dimensions of 8DH10 3/20 Totally Integrated Power by Siemens Medium Voltage NXPLUS C The medium-voltage circuit-breaker switchgear that made gas insulation with the proven vacuum switching technology economical in its class – the compact NXPLUS C for secondary and primary distribution systems up to 24 kV, up to 31.5 kA, up to 2,500 A. It can also be supplied as double-busbar switchgear in back-to-back arrangement (see Catalog HA35.41). Performance features: Type-tested according to IEC 62271-200 Sealed pressure system with SF6 filling for the entire service life Safe-to-touch enclosure and standardized connections for plug-in cable terminations Single-pole insulated and screened busbar Three-pole gas-insulated switchgear vessels with three-position switch and circuit-breaker, for connection of cable plugs Operating mechanisms and transformers are arranged outside the switchgear vessel, easily accessible Metal-enclosed, partition class PM Loss of service continuity category for switchgear: – without HV HRC fuses: LSC 2B – with HV HRC fuses: LSC 2A Internal arc classification for: – Wall-standing arrangement: IAC A FL 31,5 kA, 1 s – Free-standing arrangement: IAC A FLR 31,5 kA, 1 s Advantages: No gas work during installation or extension Independent of the environment and climate Compact Maintenance-free Safe for operators Operational reliability Environmentally compatible Cost-efficient Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbar normal current of the feeders kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 31.5 max. kA 31.5 max. kA 80 max. kA 80 max. Ak 2,500 max. Ak 2,500 12 50/60 28* 75 31.5 31.5 80 80 2,500 2,500 15 50/60 36 95 31.5 31.5 80 80 2,500 2,500 17.5 50/60 38 95 25 25 63 63 2,500 2,000 24 50/60 50 125 25 25 63 63 2,500 2,000 * 42 kV / 75 kV according to some national requirements Table 3.4/25: Technical data of NXPLUS C TIP_NXPLUS-C-001 W H1 H2 D D Dimensions Width Height Depth W H1 H2 D 630 A, 1,000 A, 1,250 A 2,000 A, 2,300 A, 2,500 A Standard design For higher low-voltage compartment Wall-standing arrangement Free-standing arrangement Dimensions in mm 600 1,200 2,250 2,650 1,100 1,250 Fig. 3.4/11: NXPLUS C panel Table 3.4/26: Dimensions of NXPLUS C 3/21 3 8DA/8DB The gas-insulated medium-voltage circuitbreaker switchgear up to 40.5 kV with the advantages of the vacuum switching technology – for a high degree of independence in all applications. 8DA/8DB10 for primary distribution systems up to 40.5 kV, 40 kA, up to 4000 A. Performance features: Type-tested according to IEC 62271-200 Enclosure with modular standardized housings made from corrosionresistant aluminum alloy Safe-to-touch enclosure and standardized connections for plug-in cable terminations Operating mechanisms and transformers are easily accessible outside the enclosure Metal-enclosed, partition class PM Loss of service continuity category for switchgear: LSC 2B Internal arc classification: IAC A FL 40 kA 1 s Advantages: Independent of the environment and climate Low maintenance Safe for operators Operational reliability Environmentally compatible Cost-efficient Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbar normal current of the feederse Table 3.4/27: Technical data of 8DA/8DB kV 12 Hz 50/60 kV 28 kV 75 max. kA 40 max. kA 40 max. kA 100 max. kA 100 max. Ak 4,000 max. Ak 2,500 24 50/60 50 125 40 40 100 100 4,000 2,500 36 50/60 70 170 40 40 100 100 4,000 2,500 40.5 50/60 50 185 40 40 100 100 4,000 2,500 8DA switchgear TIP_8DA-001 Compact W H D1 8DB switchgear TIP_8DB-001 W H D2 Dimensions Width (spacing) Height W H Standard design Design with higher low-voltage compartment Single-busbar switchgear Double-busbar switchgear Dimensions in mm 600 2,350 2,700 1,625 2,660 Depth Fig. 3.4/12: 8DA (on the left) for single-busbar and 8DB for double-busbar applications D1 D2 Table 3.4/28: Dimensions of 8DA/8DB 3/22 Totally Integrated Power by Siemens Medium Voltage NXPLUS The gas-insulated medium-voltage circuit-breaker switchgear up to 40.5 kV with the advantages of the vacuum switching technology – for a high degree of independence in all applications. NXPLUS for primary distribution systems up to 40.5 kV, up to 31.5 kA, up to 2,000 A (for doublebusbar switchgear up to 2500 A). Performance features: Type-tested according to IEC 62271-200 Sealed pressure system with SF6 filling for the entire service life Safe-to-touch enclosure and standardized connections for plug-in cable terminations Three-pole gas-insulated modules for busbar with three-position disconnector, as well as circuitbreaker, for connection of cable plugs Interconnection of modules with single-pole insulated and screened module couplings Operating mechanisms and transformers are arranged outside the switchgear vessels, easily accessible Metal enclosed, partition class PM Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbar normal current of the feeders Table 3.4/29: Technical data of NXPLUS kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 31.5 max. kA 31.5 max. kA 80 max. kA 80 max. Ak 2,500 max. Ak 2,500 12 50/60 28 75 31.5 31.5 80 80 2,500 2,500 24 50/60 50 125 31.5 31.5 80 80 2,500 2,500 36 50/60 70 170 31.5 31.5 80 80 2,500 2,500 40.5 50/60 85 185 31.5 31.5 80 80 2,000 2,000 Loss of service continuity category for switchgear: LSC 2B Internal arc classification: IAC A FLR 31,5 kA, 1 s No gas work during installation or extension Advantages: Independent of the environment and climate Compact Maintenance-free Safe for operators Operational reliability Environmentally compatible Cost-efficient NXPLUS switchgear with single busbar NXPLUS switchgear with double busbar H1 W D1 TIP_NXPLUS_DSS-001 TIP_NXPLUS-001 W H2 D2 Dimensions Width (spacing) W Height H H1 H2 Fig. 3.4/13: NXPLUS switchgear for single-busbar applications (on the left), NXPLUS switchgear for double-busbar applications (on the right) Depth D1 D2 Feeders up to 1,250 A Switchgear design Single-busbar switchgear Double-busbar switchgear Single-busbar switchgear Double-busbar switchgear Dimensions in mm 600 2,450 2,600 1,600 1,840 Table 3.4/30: Dimensions of NXPLUS 3/23 3 SIMOSEC The air-insulated medium-voltage switchgear type SIMOSEC is used for power distribution in secondary and primary distribution systems up to 24 kV and up to 1,250 A. The modular product range includes individual panels such as ring-main, transformer and circuit-breaker panels or metering panels to fully satisfy all requirements for power suppliers and industrial applications. Performance features: Type-tested according to IEC 62271-200 Phases for busbar and cable connection are arranged one behind the other Three-pole gas-insulated switchingdevice modules with three-position disconnector, circuit-breaker and earthing switch as sealed pressure system with SF6 filling for the entire service life Air-insulated busbar system Air-insulated cable connection system, for conventional cable sealing ends Metal-enclosed, partition class PM Loss of service continuity category for switchgear: without HV HRC fuses: LSC 2B with HV HRC fuses: LSC 2A Internal arc classification for: – Wall-standing arrangement: IAC A FL 20 kA, 1 s – Free-standing arrangement: IAC A FLR 20 kA, 1 s Can be mounted side-by-side and extended as desired Advantages: Compact modular design High operating and personal safety Environmentally compatible Cost-efficient Rated voltage frequency short-duration power-frequency withstand voltage lightning impulse withstand voltage short-circuit breaking current short-time withstand current, 1 s short-time withstand current, 3 s short-circuit making current peak withstand current normal current of the busbar normal current of the feeders kV 7.2 Hz 50/60 kV 20 kV 60 max. kA 25 max. kA 25 max. kA – max. kA 25 max. kA 63 12 50/60 28* 75 25 25 20 25 63 15 50/60 36 95 25 25 20 25 63 17.5 50/60 38 95 25 25 20 25 63 24 50/60 50 125 20 20 20 20 50 A 630 or 1,250 max. Ak 1,250 1,250 1,250 1,250 1,250 * 42 kV / 75 kV according to some national requirements Table 3.4/31: Technical data of SIMOSEC H1 H2 TIP_SIM-2407_1 TIP_SIM-2393_2 W D Dimensions Width (spacing) W Ring-main feeders, transformer feeders Circuit-breaker feeders, bus sectionalizer Metering panels Height H1 H2 Depth Fig. 3.4/14: SIMOSEC switchgear D Panels without low-voltage compartment Panels without low-voltage compartment Standard Dimensions in mm 375 or 500 750 or 875 750 1,760 2,100 or 2,300 1,230 Table 3.4/32: Dimensions of SIMOSEC 3/24 Totally Integrated Power by Siemens Medium Voltage 3.5 From MediumVoltage Switchgear to Turnkey Solutions Besides supplying just medium-voltage switchgear, the Siemens Power Transmission and Distribution Group (PTD) also provides the engineering and implementation of turnkey power supply systems for power supply companies, industrial customers and investors. These turnkey solutions combine the stages of design, supply, installation and commissioning of power supply systems to the hand-over of a complete package. The major benefit to the customer: communication with only one partner who is responsible for the entire project implementation. The portfolio encompasses standard and turnkey solutions as well as individual special solutions such as: Power quality solutions – SIPLINK solutions for load flow control in 2 and/or 4-quadrant operation – Active and passive compensation systems for low-voltage and medium-voltage applications – Line filters Generator switchgear Photovoltaic systems coupled to the power system Hydro-electric systems Wind power stations Some examples from the solutions portfolio of Siemens PTD M are described below. Dimensioning of compensation systems for medium voltage Today, electrical energy can be converted into every conceivable form of power, whereby the technology used reduces the quality of the power to a greater of lesser extent. The use of compensation systems is becoming increasingly necessary in order to comply with the standards and guidelines or to meet the specifications relevant for electricity rates. Compensation systems help to reduce losses, save electricity costs and improve the voltage quality. To improve the quality of the power, compensation systems for mediumvoltage applications are adapted to the technological processes of individual, exposed consumers or consumer groups or entire subsystems. The major focus is on system compatibility of all electrical consumers. In addition to knowledge of the power supply system and local conditions at the place of installation, the prerequisite for correct dimensioning is information on the present rated and operating data of the consumers to be compensated, as well as a definition of the actual goals that are to be achieved with the compensation measures. Special measuring instruments for data acquisition, powerful simulation programs and the many years of experience then enable customer-specific solutions to be dimensioned. With just a few details from the “Compensation systems for medium voltage” checklist (marked with an *), it is already possible to estimate costs for the compensation measures during the planning stage, or depending on the amount of information available, to submit tenders for compensation systems based on a sound technical knowledge. Your contact for Europe including Germany: Jürgen Sauer PTD M 34, Turnkey Stromversorgungsanlagen Dynamostraße 4 61850 Mannheim Tel.: +49 6 21 4 56-32 80 Fax: +49 6 21 4 56-32 89 Mobile: +49 1 72 6 32 31 44
[email protected] Fig. 3.5/1: Application examples Contact: Maschinenfabrik Reinhausen GmbH Power Quality Management Direct Business Division E-mail:
[email protected] www.reinhausen.com 3/25 3 Checklist Compensation systems for medium voltage Project name: Contractor: Environmental conditions: Place of installation (country) Site altitude (above sea level) < 1,000 m m Pollution Ambient air temperature (min./max.) Air humidity Resistance to earthquakes Rated system voltage* Operating voltage* System frequency* Short-circuit current or short-circuit capacity* (min./max.) Audio-frequency remote control Yes No Harmonic pre-stressing of the supply system Yes 03rd h. ..... 13th h. ..... None 05th h. ..... 17th h. ..... 07th h. ..... 19th .h. ..... 11th h. ..... _.h. ..... Frequency: ......... Hz 3/26 Totally Integrated Power by Siemens Medium Voltage Checklist Industrial sector* Power supplier Oil and gas Cement Steel industry Chemical Mining Characteristic of the consumer to be compensated Constant Stochastic Fluctuating Dynamic Power/operating data of the consumers to be compensated Data sheets Measurement results Consumers to be compensated* Type: Type: Power: Power: cos ϕ: cos ϕ: cos ϕ: Relevant producers of harmonics* Type: 6-pulse Thyristors Type: 6-pulse Thyristors None Power: 12-pulse Diodes Power: 12-pulse Diodes cos ϕ: Objective of the compensation* Improvement of the average cos ϕ Nominal cos ϕ: Nominal cos ϕ: Ensuring the motor startup Reduction of harmonics Voltage stabilization Flicker compensation Inrush current limitation Reduction of capacitive charging power Time base: Improvement of the momentary cos ϕ Time base: Standard or guideline to be complied with for the voltage quality 3/27 3 3.6 Protection of Medium-Voltage Switchgear This section provides information about the selection and use of SIPROTEC protective relays in the field of power system protection. These protective devices have the task to reliably detect faults in the power system and selectively disconnect the affected substation component. No matter whether you want to protect cables, switchgear or busbars, SIPROTEC protective relays always offer optimal and economical solutions. Basic requirements on numerical protection relays: Complete digital measuring and analysis for precise measurements throughout the entire life cycle Integrated self-monitoring with alarm contact for low maintenance costs and higher device availability Integrated fault recording and a powerful analysis program (e.g. SIGRA) for fast fault clearing and signaling, thus reducing downtimes in the event of a line fault One operating program (e.g. DIGSI) for all protective devices, providing a higher degree of operating safety and savings in staff training costs Parameter set changeover for automatic adaptation of the pickup values to different supply conditions Application-oriented functional adaptations, e.g. by means of CFC logic (Continuous Function Chart) using the DIGSI operator tool Serial communications interface for easy integration into a control system or for the data export to other applications (e.g. power management) 3.6.1 Protection Configuration in a Radial Network Radial networks distribute power from the infeed points to the consumers. However, protective tripping switches off all downstream consumers. These can be supplied from another side after switchovers (closing of emergency connections). A radial network is easy to protect due to the single-sided supply and because its topology is not meshed. However, there are still different solution options. Generally, a grading of non-directional overcurrent-time protection relays is sufficient. In this network structure, the substation busbars can also be protected by means of reverse interlocking with very short tripping times. The disadvantage of this solution is the increase in the tripping times in the direction of the system supply, the location of the highest short-circuit power. The increasing grading time also limits the number of subordinate substations. At the same time, the upstream overcurrent-time protection relays act as backup protection for subordinate devices. The overcurrent-time protection should be equipped with an I> (ANSI Code 51) and an I>> (ANSI Code 50) zone. Thermal overload protection should have parameterization options for signaling or tripping, depending on the requirement. Differential protection devices with very short tripping times offer an alternative protection concept. Line differential protection relays protect the connections between the substa- Supply 1 > I> > I> Emergency connection ∆I ∆I Supply 2 > I> MS > I> MS ∆I > > I> > Emergency connection > I> ∆I ∆I Emergency connection > I> ∆I > I> ∆I Busbar protection through reverse interlocking via additional definite-time overcurrent protection or integrated backup definite-time overcurrent protection (for ) Line differential protection: SIPROTEC 7SD600 or 7SD610 Note: Only the protection relays that are relevant for the topology have been shown Fig. 3.6/1: Radial network with a low extension 3/28 Totally Integrated Power by Siemens Medium Voltage tions in first-zone time. The backup protection concept must be considered separately. Under no circumstances should the overcurrent-time protection/backup protection function, which is integrated in the differential protection devices, be used for the same network section, as in that case hardware redundancy would not be ensured. Note: Differential protection is less common in radial networks because of cost reasons. It is only used in the process industry in order to ensure short fault clearing times and therefore prevent process interruption whenever possible. Of course, a radial network can also be protected by means of Z< distance protection relays when the distance between neighboring stations permits a correct grading of the distance zones. These devices would be able to clear the majority of faults in firstzone time. The principle of reverse interlocking is also suitable here to protect the busbars. Backup protection is also implicitly provided through the extended zone grading of subordinate network sections. Proposed devices: I> = SIPROTEC 7SJ61, 7SJ62 ΔI = SIPROTEC 7SD600 or 7SD610 Z< = SIPROTEC 7SA6 3.6.2 Protection Configuration in a Closed Ring Network Ring networks are used frequently as they permanently supply all stations with power from two sides. This enables faults on connecting cables to be selectively cleared without having to disconnect consumers. The supply from two or more sides places high demands on the protection concept, as the fault current can flow in both directions, i.e. nondirectional overcurrent-time protection relays are not suitable as the main protection measure. Ring networks are generally protected by means of differential protection relays. This enables faults on the connecting cables between the sub- stations to be tripped in first-zone time. The non-directional overcurrenttime protection function contained in these relays can be utilized for a backup protection concept, but not for busbar protection via reverse interlocking. This suggests the use of SIPROTEC 7UT6 or 7SS60 for busbar protection, in which case backup protection also requires consideration. Alternatively, ring networks can be protected by means of directional comparison protection. Directional overcurrent-time protection relays are used for this purpose; they require voltage transformers as well as a communication link to the respective partner device at the opposite end of the line. Busbar protection can be implemented with these relays via reverse interlocking. A backup protection concept can also be set up Supply 1 Supply 2 > I> > I> > I> > I> > I> > I> > I> > M Line differential protection: SIPROTEC 7SD61 with backup overcurrent-time protection Busbar differential protection: SIPROTEC 7UT6 > Directional overcurrent-time protection: SIPROTEC 7SJ62 Note: Only the protection relays that are relevant for the topology have been shown Fig. 3.6/2: Ring network with a low extension 3/29 3 through extended zone grading of adjacent network sections. Directional comparison protection is mainly used in power supply systems for infrastructure and industry. Of course, ring networks can also be protected by means of distance protection relays when the distance between neighboring substations permits a clear grading of the distance zones. These devices would clear the majority of faults in first-zone time. The principle of reverse interlocking is also suitable here to protect the busbars. Backup protection is implicitly contained through the extended zone grading of adjacent network sections. Distance protection relays also require voltage transformers. Distance protection is mainly used in the ring networks of distribution system operators. Proposed devices: ΔI = line differential protection SIPROTEC 7SD610 ΔI = busbar differential protection SIPROTEC 7UT6 I> = SIPROTEC 7SJ62 3.6.4 Protection of Parallel Lines The directional overcurrent-time protection determines the direction of the current flow from the phase angle of the current and voltage, and offers additional directional overcurrent zones besides the non-directional overcurrent-time protection. This permits different current thresholds and delay times for the two directions. Main applications are parallel lines as well as lines supplied from both sides. Proposed devices: I> = SIPROTEC 7SJ62 I> = SIPROTEC 7SJ61 or 7SJ600, 7SJ602 or 7SJ80 Differential protection relays with very short tripping times offer an alternative protection concept for parallel lines. Line differential protection relays protect the interconnections between the substations in first-zone time. The backup protection concept must be considered separately. Note: Differential protection is used mainly in the process industry in order to ensure short fault clearing times and therefore prevent a process interruption whenever possible. Supply direction Supply direction > t = 300ms > t = 300ms 3.6.3 Protection Configuration for Open Ring Networks Open ring networks have the following characteristics: circuit-breakers are installed in the system supplies. The substations in the open ring are equipped with switch-disconnectors. As a rule, they are not equipped with protective devices, as switch-disconnectors cannot break short-circuit currents. Only outgoing transformer feeders are equipped with fuses. Regarding the protective equipment for the system supply, the same applies as for the radial network. t = 0ms > t = 0ms > t = 0ms > t = 0ms > Overcurrent-time protection > SIPROTEC (7SJ61 or 7SJ600) Directional overcurrent-time > protection SIPROTEC (7SJ62) Line differential protection SIPROTEC 7SD610 > Overcurrent-time protection SIPROTEC 7SJ61 Fig. 3.6/3: Protection concept for parallel supply with definite-time overcurrent protection Grafik 3.6/4: Protection concept for parallel supply with differential protection relays 3/30 Totally Integrated Power by Siemens Medium Voltage 3.6.5 Earth-Fault Detection in an Isolated or Compensated System An earth fault is not a short circuit. Operation is first of all continued. An earth fault must be signaled and cleared as quickly as possible. The earth fault is located by devices with wattmetric earth-fault direction detection, such as SIPROTEC 7SJ602. In meshed systems, transient earthfault relays such as SIPROTEC 7SN60 are used to locate the earth fault. The earth currents can be detected with a Holmgreen circuit or a cabletype current transformer. The Holmgreen circuit is suitable for higher earth-fault currents (> 40 A) and a transformation ratio of the feeder transformers (< 150/1), that is not too high. 3.6.6 Earth-Fault Protection for LowResistance Neutral Earthing In a system with a low-resistance earthed neutral, every earth fault is a short circuit. The pickup value for the earth-fault protection must be selected so that it is suitably sensitive to reliably trip every earth fault. SIPROTEC line protection relays can optionally be selected with the appropriate earth-fault protection. In the overhead line system, approximately 70% of the earth faults are successfully cleared without major operational interruptions through automatic reclosing (AR). 3.6.7 Transformer Protection Transformer differential protection is used for selective, instantaneous protection of transformers. As the feeding line lengths of the transformers on the high and low voltage sides are usually not too long, the summated current can be formed in one device and not in separate devices as in line differential protection. Modern transformer differential protection relays no longer require any secondary interface circuits to simulate current effects imposed by the transformer. This is computed by the numerical protection device. The protection device should also be equipped with an inrush detection to ensure safe connection of the transformer. Proposed devices: Power direction Forward Backward ΔI = SIPROTEC 7UT612 for twowinding transformers ΔI = SIPROTEC 7UT613 for threewinding transformers Wattmetric directional earth-fault relay Fig. 3.6/5: Earth-fault protection 1 2 Transformer differential protection SIPROTEC 7UT612 for two-winding transformers SIPROTEC 7UT613 for three-winding transformers Fig. 3.6/6: Transformer protection 3/31 3 3.6.8 Machine Protection MV Generators < 1 MW If a cable-type current transformer is available for sensitive earth-fault protection, a 7SJ602 or 7SK80 device with a separate earth-current input can be used instead of the SIPROTEC 7SJ600. Generators up to 5 MW A SIPROTEC 7UM61 protection relay is used for larger generators. With its frequency adjustment from 11 to 60 Hz, the protection is also fully effective when the generator is started up. If a generator differential protection is required, a SIPROTEC 7UM62 protection relay should be used. Note: Two voltage transformers in a V-connection are sufficient. Fig. 3.6/7: Protection concept for very small generators with solidly earthed neutral Panel Fig. 3.6/8: Protection concept for small generators Further information: ΔI = SIPROTEC 7SD600 Catalog SIP 5.2 Order no. E50001-K4405-A121-A2 ΔI = SIPROTEC 7SD610 Catalog SIP 5.4 Order no. E50001-K4405-A141-A2 Z< = SIPROTEC 7SA6 Catalog SIP 4.3 Order no. E50001-K4404-A131-A2 ΔI = Busbar differential protection SIPROTEC 7UT6 Catalog SIP 5.6 Order no. E50001-K4405-A161-A2 I> = SIPROTEC 7SJ62 Catalog SIP 3.1 Order no. E50001-K4403-A111-A5 I> = SIPROTEC 7SJ602 Catalog SIP 3.3 Order no. E50001-K4403-A131-A2 I> = SIPROTEC 7SJ61 Catalog SIP 3.1 Order no. E50001-K4403-A111-A5 I> = SIPROTEC 7SJ600 Catalog SIP 3.2 Order no. E50001-K4403-A121-A1 Machine protection SIPROTEC 7UM61 Catalog SIP 6.1 Order no. E50001-K4406-A111-A1 SIPROTEC 7SJ61-64 Catalog SIP 3.1 Order no. E50001-K4403-A111-A5 3/32 Totally Integrated Power by Siemens Transformers chapter 4 4.1 Distribution Transformers 4.2 Control and Isolating Transformers 4 Transformers 4.1 Distribution Transformers A safe power supply requires a well developed supply system with highcapacity transformers. Wherever distribution transformers in the immediate vicinity of people must guarantee highest safety, cast-resin transformers are the perfect solution. Cast-resin transformers have made it possible to avoid the restrictions of liquid-filled transformers, while still preserving tried and tested properties such as operational reliability and long service life. In the TIP Application Manual on the Establishment of Basic Data and Preliminary Planning, essential information for the design and configuration of distribution transformers is described in Section 5.2, p. 5/12 ff. In addition to this section, please see below for the most important requirements for the site of installation. Requirements on the site of installation Cast-resin transformers place the lowest requirements on the site of installation. This arises from the provisions for groundwater protection, fire protection and conservation of functions in DIN VDE 0101, DIN VDE 0100-718 and of Elt Bau VO. Below is a comparison of transformers of different designs on the basis of these provisions, as valid in 1997. Transformer design Type of cooling in accordance with EN 60076-2 General In isolated electrical operating areas Outdoor installations Mineraloil * O a Oil sumps und collecting pits b Discharge of liquid from the collecting pit must be prevented c Water Resources Act and the state ordinances are to be observed Impermeable floors with ground plates are permissible as oil sumps und collecting pit with max. 3 transformers and less than 1,000 liters of liquid per transformer No oil sumps and collecting pits under certain conditions Complete text of VDE 0101, Section 5.4.2.5 C, must be taken into consideration = Transformers with silicone oil or synth. ester ** Cast-resin dry-type transformers K As with coolant code O A No measures required * or burning point of the cooling and insulation liquid ≤ 300 °C ** or burning point of the cooling and insulation liquid > 300 °C Table 4.1/1: Protective measures for water protection in accordance with DIN VDE 0101 Coolant code O General a Rooms fire-proof F90A, isolated; b Doors fire-retardant T30; c Doors leading outside fire-resistant d Oil sumps and collecting pits arranged so that fire does not spread; except for installation in isolated electrical operating areas with max. 3 transformers and less than 1,000 liters of liquid per transformer; e Fast working protective equipment Outdoor installations a Sufficient distances or b Fire-proof partitions K A As with coolant code O a, b and c are not necessary if e is No measures required fulfilled As with coolant code K, but without d No measures required Table 4.1/2: Protective measures for fire protection and conservation of functions in accordance with DIN VDE 0101 4/2 Totally Integrated Power by Siemens Transformers Environment Categories, Climate Categories and Fire Safety Categories IEC 60076-11 defines Environment Categories, Climate Categories and Fire Safety Categories, which take into consideration the various operating conditions at the site of installation. The Environment Category (E) takes into account air humidity, precipitation and pollution. The Climate Category (C) takes into account the lowest ambient temperature. It is thus also a measure of the crack resistance of the cast-resin impregnation. The Fire Safety Category (F) takes into account the possible consequences of fire. Important! In accordance with IEC 60076-11 or DIN 42523 the required class may be defined by the operator. GEAFOL transformers fulfill the requirements of the highest defined classes: Environment Category E2 Climate Category C2 Fire Safety Category F1 Temperature of the cooling air Transformers are designed for the following values of the cooling air in accordance with the relevant standards: Maximum 40 °C Daily average 30 °C Annual average 20 °C Environment Category Class E0 Class E1 Class E2 Climate Category Class C1 Class C2 Fire Safety Category Class F0 Class F1 Limiting of the fire risk is not envisaged. The properties of the transformer mean the fire risk is limited. Indoor installation not below –5 °C Outdoor installation down to –25 °C No precipitation, pollution negligible Occasional precipitation, pollution possible to a limited extent Frequent precipitation or pollution, also both at the same time Table 4.1/3: Environment Categories, Climate Categories and Fire Safety Categories in accordance with IEC 60076-11 Under normal operation this means normal service life consumption is attained. The average annual temperature and the capacity in particular are decisive for service life consumption. Ambient temperatures deviating from this affect the load capacity of the system. Special installation conditions Extreme conditions on site are to be taken into consideration when planning the system: Coating and prevailing temperatures are relevant for use in a tropical climate. For use at an altitude of over 1,000 m above sea level, a special design with regard to warming and insulation level is necessary (see IEC 60076-11). Ambient temperature (annual average) –20 °C –10 °C 0 °C +10 °C +20 °C +30 °C Capacity 124 % 118 % 112 % 106 % 100 % 93 % Table 4.1/4: System capacity depending on the ambient temperature In the event of increased mechanical strain – use in a ship, excavator, earthquake region, etc. – structural support may be required, e.g. propping of the top yokes. 4/3 4 Minimum distances Maximum voltage*) of the equipment Um (see Fig. 4.1/1) kV 12 24 24 36 36 Rated, withstand, lightning stroke, impulse voltage*) LI List 1 kV – 95 – 45 – List 2 kV 75 – 125 – 170 Minimum distance a mm 120 160 220 270 320 b mm **) **) **) **) **) c mm 50 80 100 120 160 *) see DIN EN 60076-3 (VDE 0532 T3); **) distance b = distance a, if h.v. tapping here; otherwise: distance b = distance c Table 4.1/5: Minimum distances around GEAFOL transformers Shock-hazard protection The cast-resin surface of the transformer winding is not safe to touch during operation. Hence, protection against accidental touching is necessary. Various measures taken at the time of installation of the transformer in an electrical operating area ensure shock-hazard protection, e.g. the fitting of a guard strip (Fig. 4.1/2) or grid (Fig. 4.1/3). Examples of design Fig. 4.1/2 and 4.1/3 show examples of types of protection against accidental touching. For the distances A, B and C the following rule applies: Minimum distance (Table 4.1/3) plus 30 mm safety margin (tried and tested dimension) plus Assembly distance (depending on space required). Safe clearance D (Fig. 4.1/3) is required for separation with cover strips, chains or ropes, mounted at a height of 1,100 to 1,300 mm. For Um, the following applies: 12 kV = 500 mm 24 kV = 500 mm 36 kV = 525 mm Safe clearance E (Fig. 4.1/3) is required for a grid height of 1800 mm. For Um, the following applies: 12 kV = 215 mm 24 kV = 315 mm 36 kV = 425 mm and max. 40 mm mesh size for wire-mesh doors or guards. Safe clearance D and E in accordance with DIN VDE 0101. Room division between transformers When several cast-resin transformers are arranged in one room (Fig. 4.1/2 and 4.1/3), room division is not stipulated, but this is normally done using b a Fig. 4.1/1: Minimum distances around GEAFOL transformers a simple, non-flammable partition. Partitioning has clear advantages if transformers supply different networks; if one transformer has to be isolated, the other one can remain in operation. Further information: Siemens AG, Power Transmission and Distribution (ed.): GEAFOL cast-resin transformers: Planning Notes, Order No. E50001-U413-A47-V2 4/4 Totally Integrated Power by Siemens c Transformers Full wall Full wall 1800 1300 C D Fig. 4.1/2: Example of a guard strip Fig. 4.1/3: Example of a grid E B A B C A 1800 4/5 4 4.2 Control and Isolating Transformers 4.2.1 Single- and Three-phase Dry-type Transformers safely under very varied conditions throughout the world. The range comprises: Power range 25 VA to 2 MVA Voltage range 1 V to 3.6 kV Current range 1 A to 20 kA Standards/regulations SIRIUS one- and three-phase transformers < 16 kVA are categorized as isolating, control and line transformers in accordance with EN 61558-2-4, -2-2, -2-1 or safety isolating, control and line transformers in accordance with EN 61558-2-6, -2-2, -2-1 or autotransformers in accordance with EN 61558-2-13 with selectable input and output voltages Note: In the case of SIRIUS transformers, line transformers with ≤ 50 V on the output side are always designed as safety isolating transformers. language version of the international standard IEC 61558 (Safety of power transformers, power supply units and similar) and has completely replaced the older standards VDE 0550 and VDE 0551. These changes have resulted in stricter conditions for production and testing for some transformers. With SELV* (exposed, maximum 50 V AC or 120 V DC), transformers for general use always have double or reinforced insulations, i.e. these transformers are exclusively safety isolating transformers. Furthermore, all transformers are supplied with instructions for protective elements which can be used to protect them against short circuit und overload. One- and three-phase dry-type transformers > 16 kVA DIN VDE 0532-6 Area of application In industrial machines, process engineering, heating and air conditioning technology, etc. for feeding control and signaling circuits, if several electromagnetic consumers (e.g. contactors) are to be controlled, control and signaling devices are used outside the control cabinet, the operating voltage of the consumer is different to that which is available, as well as for voltage matching for machines and systems with electrical isolation or as an autotransformer, or in general for voltage matching of electrical equipment, e.g. in communication technology, medical engineering and building installations. Fig. 4.2/1: SIRIUS dry-type transformers Areas of application Control transformers in the construction of plants and process control equipment Matching transformers for manufacturing plants Isolating and safety isolating transformers for electrical equipment Transformers in production machines Associated transformers for communication technology, medical engineering and building installations Transformers for drive systems In order to ensure the correct voltage in every situation, the right transformer is needed. SIRIUS dry-type transformers are reliable, functionally SIRIUS one- and three-phase power transformers > 16 kVA can be used as matching transformers with an input/output voltage in accordance with DIN VDE 0532-6 and as matching, auto- or converter transformers in accordance with DIN VDE 0532-6 with selectable input and output voltages. SIRIUS dry-type transformers provide optimal protection with high permissible ambient temperatures up to 40 °C or 55 °C, high short-time rating in the case of control transformers, a fuseless design and their safety standard “Safety inside“ EN 61558. For more technical data on the Internet see www.siemens.com/sidac One- and three-phase dry-type transformers < 16 kVA EN 61558-2-6, -2-4, -2-2, -2-1, -2-13 The standard EN 61558 with the VDE classification VDE 0570 is the German- * Safety Extra-Low voltage 4/6 Totally Integrated Power by Siemens Transformers In drive engineering, special converter transformers are used for voltage matching and as autotransformers when infeed/feedback modules are used Special transformers are used for rail vehicles, ships and container loading bridges, wind power and solar energy. Important properties of one- and three-phase dry-type transformers High short-time rating of SIRIUS control transformers: lower transformer-rated power with a larger number of contactors Suitable for “fuseless design“: the low inrush on the primary side means “circuit-breakers for motor protection“ can also be used CUUS-approved for the US and Canada Characteristics Rated power Pn (continuous operation) depending on: – frequency AC 50 Hz … 60 Hz – degree of protection IP00 – installation altitude up to 1,000 m above sea level and – ambient temperature ta, type-dependent 40 °C or 55 °C. Referring to the ambient temperature, the parameter Pn is a characteristic of the thermal load capacity. Installation and operating conditions that deviate from this affect the permissible continuous load by the consumers (see Fig. 4.2/1). Short-time rating Pshortt The most important selection criterion for control transformers is their shorttime rating Pshortt. This is required for Table 4.2/1 SIRIUS transformers 4/7 4 1,10 n zul. n NSF0_00141c 1,0 0,9 0,8 short-circuit current and the thermal load capacity on overload are matched to the tripping characteristics of the circuit-breakers. 6 net and downloaded from www.siemens.com/sidac –> Support –> Tools & Downloads 0 1 2 3 4 5 Installation altitude [x 1,000 m above sea level] 1,4 n zul. n NSF0_00142c 1,2 1,0 0,8 0,6 0 10 20 a= a= 55 °C/H It is also possible to protect the transformers on the secondary side against short circuits or overload with circuitbreakers or with miniature circuitbreakers with C characteristics. Note: The specified primary-side circuitbreakers are for protecting the primary side of transformers in the event of short circuit und overload on the secondary side. In the event of a possible short circuit on the feeder lines between the protective device and the primary side of the transformer, the rated short-circuit breaking capacity of the circuit-breaker must be taken into account with regard to the maximum possible current at the place of installation. Configuration assistant ASIST ASIST is a PC program for selecting control transformers available in German, English and Danish. EN 61558-2-2 stipulates that the short-time rating must be entered on the rating plate only if power factor cos phi = 0.5 of the load. The shorttime rating of control transformers depends essentially on cos phi of the load, however. It increases with lower power factors in particular. It is thus all the more important to calculate the exact short-time rating with the relevant cos phi. Using the PC program ASIST as a configuration assistant reduces the time it takes to calculate the required type size to a minimum and guarantees that the control transformer is technologically and economically optimal. The current version of the ASIST program can be ordered on the Inter- 4.2.2 Non-Stabilized DC 24 V Power Supplies Area of application Non-stabilized 24 V DC power supplies are used to supply general electrical loads, feed control circuits, provide a power supply for electronic controllers. Note: They meet the requirements in accordance with EN 61131-2 “Programmable controllers – Equipment requirements and tests“ and are, besides other applications, also suitable for SIMATIC. Selection/overview SIRIUS power supplies provide nonstabilized direct voltage of 24 V DC on the basis of single-phase transformer or three-phase safety isolating transformers with series-connected rectifiers and smoothing capacitor. Function SIRIUS power supplies meet the requirements in accordance with EN 61131-2, depending on the loading (idling to rated current) and irrespective of the fluctuation of the supply voltage (+6% to –10% in accordance with IEC 60038). The electronic controller is supplied with the permissible operating voltage also in the event of fluctuation of these parameters without the necessity, depending on the load and network conditions, of also having to select relevant tapping on the transformer to raise or lower the output direct voltage. In the event of a 40 °C/H a= 40 °C/B 30 40 50 60 °C 80 Ambient temperature Fig. 4.2/1: Load characteristics: permissible transformer continuous load in relation to the ambient temperature and the installation height switching on electromagnetic loads, e.g. contactors with high making capacity in relation to the holding power. In accordance with EN 61558-2-2 “Particular requirements for control transformers“ the output voltage with this load should not drop more than 5% in relation to the rated voltage in order to ensure safe switching. Depending on their application, SIRIUS control transformers < 16 kVA are optimized for high short-time rating with comparatively low rated power and thus small size Inrush current SIRUS transformers in the power range < 16 kVA have been designed for protective equipment which provides the transformers with reliable protection in the event of short circuit or overload. Optimal protection is provided by the SIRIUS standard circuit-breakers 3RV and 3VF. Thus, the transformers are protected on the primary side against both short circuits and overload, without the risk of false tripping on startup. The low inrush current, the 4/8 Totally Integrated Power by Siemens Transformers SIRIUS power supplies Non-Stabilized Power Supplies Version Ripple factor Phases Rated output Rated output voltage in acc. w. voltage EN 61131-2 suitable for SIMATIC systems AC V Filtered 4AV21/23 30 Flue gases arising from a fire can make it difficult to recognize escape routes, so the materials for cables and wires must be designed to be low fuming. For measuring the flue gas density, the procedure normally used is the American one for measuring the light absorption in the waste gas duct of the furnace when a defined test piece is exposed to flames. Inspection standards: IEC 61043-1 and -2/VDE 0482-268-1 and VDE 0482-268-2 7/11 7 Functional endurance of cables and wires in the event of exposure to flames The functional endurance (previously known as insulation integrity) of cables and wires indicates how long a cable exposed to fire remains electrically reliable. The test method used here is the standard VDE 0472 / DIN 57472-804 derived from IEC 60331. A 1.2 m-long cable test specimen is fired with a flame of 800 °C (± 50 °C) for the duration of 20 minutes, while power cables are supplied with 400 V and communication cables with 110 V alternating voltage during exposure to flames. In this test, up until January 1991 the test specimen was only tested for insulation integrity, and this was done by monitoring for short circuit between the wires. Note: The modified standard DIN VDE 0472-814: 1991-01 stipulates testing the copper conductor for interruption since the function of the line is only ensured if there is no interruption or short circuit during the required time of exposure to flames. The functional endurance in accordance with DIN VDE 0472-814 is indicated on the line by means of an additional label FE for functional endurance of at least 20 minutes or with additional information (time class), e.g. FE 90 for functional endurance of at least 90 minutes. The usual time classes are FE (2); FE 30; FE 60; FE 90; FE 120; FE 180. However, in practice, electric lines tested as above have often failed in the event of real fires much earlier than as defined by the functional test, so that, for example, emergency lighting, signs for fire exits and smoke extraction systems, etc. have prematurely failed to function. This has often had serious consequences for people and assets. Functional endurance of the cable system For a long time, therefore, the authorizing agencies had called for a realistic test for these types of line to be devised that corresponds much more closely to the actual conditions in the event of fire. It was very soon realized that, for example, the cable fixing plays a decisive role in maintaining the electrical function, and the fire test conditions must be made more stringent. These requirements have been fulfilled with the standard DIN 4102-12: 1991-01. It applies to assessing the fire behavior of construction materials and structural elements of electric cable systems. In order to distinguish the functional endurance in accordance with DIN VDE 0472-814, the functional endurance classes E30, E60 and E90 for the functional endurance of a cable system have been created. Cables and wires that are in accordance with the test specification DIN 4102-12 receive the much soughtafter type-examination certificate (IBMB) only in conjunction with approved, tested cable fixing systems (e.g. by OBO). Since the building authorities in Germany act in accordance with DIN 4102 regarding requirements for cable systems, the previous VDE test in accordance with 0472-814 has become much less important. There are also other functional endurance tests in other countries. Here it is worth mentioning the test methods used in Belgium in accordance with NBN-C 30-004F3, where the test specimen is exposed to an additional firing mechanism, and the French test method in accordance with NF C32-070 CR1, where the flame temperature is 900 °C and the time exposure to flames is 15 minutes. Fire load The fire load of cables and wires is determined by measuring the energy released per meter of line for total combustion of all organic substances. This is a theoretical value which is calculated from the sum of the individual components used in the cable. The figures are in kWh/m or MJ/m. What should also be mentioned regarding measurement of the fire load is the comparison between PVC cables and wires and fire-resistant cables and wires. This is used to ascertain that the fire load with PVC cables is lower than fireresistant cables; but this comparison is inappropriate since the flashing time is not defined here. If the flashing time of PVC cables was taken as a basis, it would be established that the fireresistant cables are not yet burnt and thus had released less energy than PVC cables. There is no valid measuring method for this. Note: The fire safety classes standardized in DIN 4102 indicate fire resistance classes according to a fire resistance rating in minutes. F90 means fire resistance rating = 90 minutes. This standard also indicates classifications for non-combustible construction materials (A1, A2) and combustible construction materials with the classes B3 – highly inflammable, B2 – normal flammability and B1 – low flammability (flame-retardant). This information cannot be applied to the provisions for cables and wires, since in DIN 4102, fire propagation is the main concern, i.e. the fire shielding time in the event of a fire potentially spreading. There is only a link between fire safety classes and the provisions for cables and wires with special fire behavior concerning the building regulations on fire barriers for cable 7/12 Totally Integrated Power by Siemens Busbar Trunking Systems, Cables and Wires penetration, which is to be found with details of the fire resistance classes, e.g. F90 and with relevant details about size of the wall openings, minimum wall thicknesses and other established points. Construction of cables and wires with functional endurance Bare copper conductors, which according to requirements (up to three hours’ functional endurance) can be covered with a layer of insulating mica, and then insulation made of flame-retardant, halogen-free, crosslinked polyolefin. A layer of fiber glass is normally used over the coating of the stranded wires as a flame protection layer. A material made of flameretardant, halogen-free, cross-linked polyolefin is also used as an outer sheath. These construction characteristics mean that all the requirements for properties described in the introduction can be fulfilled. Construction of cables and wires with particular burning behavior For cables and wires with particular burning behavior in halogen-free or low-halogen versions, the same construction principles apply as to the standard cable types. Effects of flame-retardant additives in halogen-free materials The fundamental effect is demonstrated below through the example of an EPR compound and the additive aluminum hydroxide: At fire temperatures, considerable quantities of heat are consumed through the decomposition of aluminum hydroxide and thus extracted from the combustion process of the rubber. This slows down the speed of the burn-off of the rubber compound and the formation of combustible decomposition products. The steam vapor produced from the decomposition of the aluminum hydroxide forms an oxygen-dispelling protective gas. A crust is formed on the surface of the rubber from the carbonizing products and aluminum hydroxide which limits further progress of the combustion. Multi-cable fire test with respect to compound development Experience during development of these cables has shown that a furnace and test equipment for testing the fire propagation to cable groupings in accordance with IEC 60332-3 are essential for the development of fireresistant cables and wires. For it has emerged that with compound development it is only possible to assess the burning behavior of cables only for the respective test methods and when even apparently inconsequential boundary conditions are observed. A change in the air exchange rate during the multi-cable fire test can turn the test result completely upside down. Experience to date has shown that on the basis of the combustibility of a material established under laboratory conditions, for example, measured as LOI value, is in no way an indication of the course of the multi-cable fire test. This can be clearly illustrated taking the example of an ethylene vinyl acetate (EVA) based rubber compound with an LOI value > 40, since it fails as a sheathing compound in the multi-cable fire test; a flame-retardant influence is not observed. Consequence: There is virtually no point in attempting to relate the results from different burning tests in order to draw conclusions from the result of one test procedure on the probable result of another fire test. Assessments within a material or compound group are only to be made for burning tests actually conducted with the same boundary conditions. 7.2.2 Types of Safety Cables and Wires and their Areas of Application Fixed installation 0.6/1 kV NHXH power cable 0.6/1 kV N2XH; N2XCH power cable 0.6/1 kV (N)HXH power cable E30, -E90 for safety circuits 0.6/1 kV (N)HXCH E30, -E90 power cable for safety circuits H(St)H light-current cable JH(St)H light-current cable E30,-E90 for safety circuits. These cables are suitable for fixed indoor installation, in cable ducts and sometimes also outdoors. Areas of application are facilities with high requirements for safety and protection of persons and concentration of assets. Examples: industrial plants, premises with data processing equipment, nuclear power plants, military facilities, multi-story buildings, warehouses, building services, mobile drilling platforms, ships, mines, underground installations, tunneling, hospitals, etc. NHXMH installation lines These lines are to be used preferably for fixed installation, for the indoor wiring of buildings with increased safety requirements, where protection of persons is the main concern and there are limited escape routes in the event of a fire. 7/13 7 Examples: hospitals and department stores, hotels, high-rise apartment blocks, theaters, administrative buildings, terminal buildings at airports, emergency power systems for lighting escape routes, ventilation systems, etc. Flexible round cables These cables are suitable for laying in dry, damp and wet rooms, and some also outdoors. Areas of application are machines and industrial plants with increased safety requirements where protection of assets is the main concern. For cables used in this type of capacity, there are frequently further * Materials used should be free of substances harmful to the application of lacquers requirements regarding flexibility, oil resistance, no substances harmful to lacquers,* etc. Examples: connection and control line of and in machine tools, conveyors, large machinery, if the cables are subject to bending. Depending on requirements regarding flexibility, these are ÖLFLEX 110H, ÖLFLEX 130H, ÖLFLEX 440P, ÖLFLEX-FD 855P. Example of application of ÖLFLEX 130H: baggage handling systems in airports. Note: VDE 0298-4 applies to the correct dimensioning of the current carrying capacity of cables and wires in build- ings. Outside of buildings (in air or in ground) VDE 0276-603 also applies. An overview is to be found in the product information on halogen-free cables in the latest LAPPKABEL catalog. www.lappkabel.de Halogen-free cables with burning behavior in accordance with IEC 60332-1 (flame-retardant) or IEC 60332-3 (highly flame-retardant) Product name ÖLFLEX CLASSIC 100 H ÖLFLEX CLASSIC 110 H ÖLFLEX CLASSIC 110 CH ÖLFLEX CLASSIC 120 H ÖLFLEX CLASSIC 120 CH ÖLFLEX CLASSIC 130 H ÖLFLEX CLASSIC 135 CH ÖLFLEX 440 P ÖLFLEX 440 CP ÖLFLEX 540 P ÖLFLEX 540 CP SPIREX coiled cable ÖLFLEX SERVO FD 755 P ÖLFLEX SERVO FD 755 CP ÖLFLEX SERVO FD 760 CP ÖLFLEX SERVO FD 770 CP ÖLFLEX SERVO FD 781 P ÖLFLEX SERVO FD 781 CP ÖLFLEX SERVO FD 785 P ÖLFLEX SERVO FD 785 CP ÖLFLEX FD 820 H ÖLFLEX FD 820 CH ÖLFLEX FD 855 P ÖLFLEX FD 855 CP Burning behavior highly flame-retardant highly flame-retardant highly flame-retardant flame-retardant flame-retardant highly flame-retardant highly flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant Characteristics connecting cable, oil-resistant, free of substances harmful to lacquers, hydrolysis-resistant control cable, oil-resistant, free of substances harmful to lacquers, hydrolysis-resistant as ÖLFLEX CLASSIC 110 H plus Cu braided screen control cable, oil-resistant, free of substances harmful to lacquers, hydrolysis-resistant, increased flexibility as ÖLFLEX CLASSIC 120 H plus Cu braided screen inexpensive control cable, free of substances harmful to lacquers, hydrolysis-resistant as ÖLFLEX CLASSIC 130 H plus Cu braided screen (without inner sheath) PUR control cable, resistant to cold, oil-resistant, VDE registered as ÖLFLEX 440 P plus Cu braided screen power cable, resistant to cold, oil-resistant, VDE registered as ÖLFLEX 540 P plus Cu braided screen coiled cable made of ÖLFLEX 540 P with high recoiling forces PUR servomotor cable, resistant to cold, oil-resistant as ÖLFLEX SERVO FD 755 P plus Cu braided screen feedback cable (speedometer cable) resolver, encoder, sensor cable PUR servomotor cable, resistant to cold, oil-resistant, low-capacity as ÖLFLEX SERVO FD 781 P plus Cu braided screen PUR servomotor cable, resistant to cold, oil-resistant, low-capacity, 0.6/1 kV as ÖLFLEX SERVO FD 785 P plus Cu braided screen power chain cable, resistant to cold, optimal very small diameters as ÖLFLEX FD 820 H plus Cu braided screen power chain cable for long distances to be traversed, resistant to cold, UV-resistant as ÖLFLEX FD 855 P plus Cu braided screen Type of installation fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible flexible flexible flexible flexible flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible highly flexible Table 7.2/2: Connecting and control cables for machines and industrial plants (Source: LAPPKABEL) 7/14 Totally Integrated Power by Siemens Busbar Trunking Systems, Cables and Wires Product name LAPPTHERM 145 lines LAPPTHERM 145 C lines H05Z-K, H07Z-K 90° H05Z-K, H07Z-K 110° Burning behavior highly flame-retardant highly flame-retardant flame-retardant highly flame-retardant Characteristics electron beam cross-linked line, thermally particularly resistant, unsusceptible to welding beads as LAPPTHERM 145 line plus Cu braided screen halogen-free single-core, max. temperature range on the conductor +90 °C halogen-free single-core, max. temperature range on the conductor +110 °C silicone single-core for operating temperature range from –50 °C to +180 °C silicone control and connecting cable, temperature range from –50 °C to +180 °C as SILFLEX SiHF but with steel wire armoring silicone control and connecting line with HAR approval, notch-resistant silicone control and connecting line with UL/CSA approval silicone control and connecting line, notch-resistant as SILFLEX EWKF plus Cu braided screen single-core made of glass filament for high temperatures: –50 °C to +350 °C cable made of glass filament for high temperatures: –50 °C to +350 °C single-core for extreme temperatures from –195°C to +400 °C, for a short time up to +1565 °C cable for extreme temperatures from –195 °C to +400 °C, for a short time up to +1565 °C Type of installation fixed/flexible fixed/flexible fixed fixed fixed fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible fixed/flexible SILFLEX SiF, SiF/GL, SiD, SiZ, FZLSi flame-retardant SILFLEX SiHF SILFLEX SiHF/GLS SILFLEX H05SS-F EWKF SILFLEX UL/CSA SILFLEX EWKF SILFLEX EWKF C ZERO-FLAME SC 350 ZERO-FLAME MC 350 ZERO-FLAME SC 1565 ZERO-FLAME MC 1565 flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant Table 7.2/3: Connecting and control cables for machines and industrial plants (Source: LAPP CABLE) Product name (N)HXMH J-H(ST)H …BD J-H(ST)H …BD fire alarm cable UNITRONIC LAN UTP/S-H 200 MHz-CAT.5e UNITRONIC LAN UTP/S-H 250 MHz-CAT.6 UNITRONIC LAN STP/S-H PiMF 250 MHz-CAT.6 UNITRONIC LAN STP/S-H PiMF 600 MHz-CAT.7 Burning behavior highly flame-retardant highly flame-retardant highly flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant Characteristics high-current installation cable installation cable for telephone, measurement and signal transmission fire alarm cable for telephone, measurement and signal transmission in accordance with VDE 0815 Type of installation fixed fixed fixed fixed/flexible fixed fixed/flexible fixed fixed Class D LAN cable for structured cabling Class E LAN cable for structured cabling Class E LAN cable for structured cabling, pairs in metal foil Class F LAN cable for structured cabling, pairs in metal foil LAN cable meeting the requirements of draft standard prEN 50288-4-1 UNITRONIC LAN 1.2 GHz HITRONIC POF SIMPLEX PE-PUR HITRONIC POF SIMPLEX S PE-PUR/S PA-PUR OWG for transmissions up to ca. 60 m for 660 nm wavelength, adhesive-free fixed as HITRONIC POF SIMPLEX PE-PUR, also SERCOS compatible fixed HITRONIC POF SIMPLEX FD PE-PUR HITRONIC POF DUPLEX FD PE-PUR HITRONIC HUN LWL HITRONIC HDH I-V(ZN) H ETHERLINE H CAT.5 and CAT.5e ETHERLINE H Flex CAT.5 OWG for transmissions up to ca. 60 m for 660 nm wavelength, adhesive-free highly flexible OWG for transmissions up to ca. 60 m for 660 nm wavelength, adhesive-free highly flexible fiber glass cable for use indoors and outdoors for high mechanical loads fixed fixed fixed flexible mini-breakout fiber glass cable for short to medium distances indoors fast Ethernet lines with transmission rate 100 Mbit/s fast Ethernet line with transmission rate 100 Mbit/s Table 7.2/4: Cables and lines, data lines, optical fiber for building installation (Source: LAPP CABLE) Product name UNITRONIC LiHH UNITRONIC LiHCH UNITRONIC LiHCH (TP) UNITRONIC FD P plus UL/CSA UNITRONIC FD CP plus UL/CSA Burning behavior flame-retardant flame-retardant flame-retardant flame-retardant flame-retardant Characteristics data line with DIN 47100 color code as UNITRONIC LiHH plus Cu braided screen as UNITRONIC LiHCH, paired data line for power chain use, UL listed, low-capacity, resistant to cold as UNITRONIC FD P plus UL/CSA but with Cu braided screen as UNITRONIC FD CP plus UL/CSA, paired installation remote bus cable INTERBUS 100 ø, color-coded in accordance with DIN 47100 remote bus cable INTERBUS 100 ø for power chain use installation remote bus cable INTERBUS 100 ø for power chain use PROFIBUS line for higher requirements, oil-resistant PROFIBUS line for higher requirements, oil-resistant Type of installation fixed/flexible fixed/flexible fixed/flexible highly flexible highly flexible highly flexible fixed highly flexible highly flexible fixed fixed UNITRONIC FD CP (TP) plus UL/CSA flame-retardant UNITRONIC BUS P COMBI IBS UNITRONIC BUS FD P IBS UNITRONIC BUS FD P COMBI IBS UNITRONIC BUS L2/FIP 7-wire UNITRONIC BUS HFFR L2/FIP FC flame-retardant flame-retardant flame-retardant flame-retardant highly flame-retardant Table 7.2/5: Data and bus lines for machines and industrial plants (Source: LAPP CABLE) 7/15 7 7/16 Totally Integrated Power by Siemens Subdistribution Systems chapter 8 8.1 General 8.2 Configuration 8.3 Selectivity and Back-up Protection 8.4 Small Distribution Boards and Wall- or Floor-Mounted Distribution Boards 8.5 Circuit Protection Devices 8 Subdistribution Systems 8.1 General Subdistribution systems, as an essential component for the reliable power supply to all consumers of a building, are used for the distributed supply of circuits. From the subdistribution boards, cables either lead directly or via ground contact outlets to the consumer. Protective devices are located within the subdistribution systems. These are: Fuses Miniature circuit-breakers RCD (residual current devices) Circuit-breakers Overvoltage protection They provide protection against personal injury and protect: Against excessive heating caused by non-permissible currents Against the effects of short-circuit currents and the resulting mechanical damage. In addition to the protective devices, a subdistribution system also contains devices for switching, measuring and monitoring. These are: Isolators KNX/EIB components Outlets Measuring instruments Switching devices Transformers for extra-low voltages Components of the building control systems 8.2 Configuration The local environmental conditions and all operating data have utmost importance for the configuration of the subdistribution systems. The dimensioning is made using the following criteria: Ambient conditions Dimensions Mechanical stress Exposure to corrosion Notes concerning construction measures Wiring spaces Environmental conditions Electrical data Rated currents of the busbars Rated currents of the supply circuits Rated currents of the branches Short-circuit strength of the busbars Rating factor for switchgear assemblies Heat loss Protection and installation type Degree of protection Observance of the upper temperature limit Installation type (free-standing, floor-mounted distribution board, wall-mounted distribution board) Protective measures Accessibility, e.g. for installation, maintenance and operating Type of construction Number of operating faces Space requirements for modular installation devices, busbars and terminals Supply conditions The number of subdistribution boards in a building is determined using the following criteria: Floors A high-rise building normally has at least one floor distribution board for each floor. A residential building normally has one distribution system for each apartment. Building sections If a building consists of several sections, at least one subdistribution system is normally provided for each building section. Departments In a hospital, separate subdistribution systems are provided for the various departments, such as surgery, OP theater, etc. Safety power supplies Separate distribution boards for the safety power supply are required for supplying the required safety equipment. Depending on the type and use of the building or rooms, the relevant regulations and guidelines must be observed, such as VDE 0100-710 and -718 and the MLAR (Sample Directive on Fireproofing Requirements for Line Systems). 8.2.1 Standards to be Observed for Dimensioning IEC 60364-2-20, DIN VDE 0100-200 Low voltage installations; Part 200 Definitions IEC 60364-3-30, DIN VDE 0100-300; Assessment of general characteristics of installations 8/2 Totally Integrated Power by Siemens Subdistribution Systems IEC 60364-4-41, DIN VDE 0100-410 Protection against electric shock IEC 60364-4-30 / DIN VDE 0100-430 Protection against overcurrent IEC 60364-5-51 / DIN VDE 0100-510 Selection and erection of electrical equipment; common rules IEC 60364-5-20 / DIN VDE 0100-520 Wiring systems DIN VDE 0298-4 Recommended values for the current carrying capacity of sheathed and nonsheathed cables DIN VDE 0606-1 Connecting materials up to 690 V; Part 1 – Installation boxes for accomodation of equipment and/or connecting terminals DIN 18015-1 Electrical systems in residential buildings, planning principles of the individual devices and assemblies must also be consulted. In addition, the appropriate regulations and standards must be observed. At this point, a reference should be made to the SIMARIS design dimensioning tool that automatically takes account of the above mentioned conditions, catalog data, standards and regulations, and consequently automatically makes the device selection. breaking capacity of the switching device or the consumers. If this is not the case, an additional limiting protective device unnecessarily reduces the selectivity or, indeed, removes it. The following scheme should be followed for the selectivity or back-up protection decision: determine the maximum shortcircuit current at the installation point, check whether the selected protective devices can master this shortcircuit current alone or with backup protection using upstream protective devices, check at which current the downstream protective devices and the upstream protective devices are selective to each other. Selectivity and back-up protection exemplified for a data center Computer centers place very high demands on the safety of supply. This is particularly true for the consumers attached to the uninterruptible power supply and ensure a reliable data back-up in case of a fault and service interruption. Those solutions providing selectivity and back-up protection relying on the previously mentioned SIMARIS design configuration tool should be presented at this point. Photo 8.3/1 shows a subdistribution system in SIMARIS design. A SENTRON 3WL circuit-breaker as outgoing feeder switch of the main distribution is upstream to the subdistribution system shown here. The following figures show the selectivity diagrams for the considered subdistribution system automatically generated by SIMARIS design (Photo 8.3/2). SIMARIS design specifies the characteristic curve band of the considered circuit (yellow lines), the envelope curves of 8.3 Selectivity and Back-up Protection Rooms used for medical purposes (VDE 0100-710) and meeting rooms (DIN VDE 0100-718) require the selection of protective devices in subareas. For other building types, such as computer centers, there is an increasing demand for a selective grading of the protective devices, because only the circuit affected by a fault would be disabled with the other circuits continuing to be supplied with power without interruption (see also Section 2.3 “Power System Protection and Protection Coordination”). Because the attainment of selectivity results in increased costs, it should be decided for which circuits selectivity is useful. Back-up protection is the lower-cost option. In this case, an upstream protective device, e.g. an LV HRC fuse as group back-up fuse, supports a downstream protective device in mastering the short-circuit current, i.e. both an upstream and a downstream protective device trip. The short-circuit current, however, has already been sufficiently reduced by the upstream protective device so that the downstream protective device can have a smaller short-circuit breaking capacity. Back-up protection should be used when the expected solid short-circuit current exceeds the 8.2.2 Selection of the Protective Devices and Connecting Lines The selection and setting of the protective devices to be used must satisfy the following three conditions: Protection against non-permissible contact voltage for indirect contact (electric shock) Overload protection Short-circuit protection Detailed information for the three conditions, see Section 2.2 “Dimensioning of Power Distribution Systems”. An exact protective device selection and thus the dimensioning of subdistribution systems requires extensive short-circuit current calculations and voltage drop calculations. Catalog data for the short-circuit energies, the selectivity and the back-up protection 8/3 8 Photo 8.3/1: Subdistribution in a data center, display in SIMARIS design all upstream devices (blue line) and all downstream devices (red line). In addition to the specification of the minimum and maximum short-circuit currents, any selectivity limits for the individual circuits are also specified. Photo 8.3/3 shows the selective grading of the 3WL circuit-breaker from the main distribution system and the group back-up fuse (125 A LV HRC fuse) of the subdistribution system. The consumers critical for functional endurance which are installed in a redundant manner in the subdistribution system should not be protected with the same back-up fuse but rather be assigned to different groups. The selectivity diagram shows the circuit diagram of a single-phase consumer in the subdistribution system. This circuit diagram is protected with a 10 A miniature circuitbreaker with characteristic C and for a maximum short-circuit current of 9,719 kA selective for the 125 A group back-up fuse. The same subdistribution system also contains an example for back-up protection. Photo 8.3/4 shows the selectivity diagram for the combination of the group back-up fuse with a 10 A miniature circuit-breaker of the characteristic B. Up to the breaking capacity of the 15 kA miniature circuit-breaker, the two protective devices are selective to each other. Above this value, the current is limited by the fuse and the miniature circuitbreaker protected by a fuse; both devices trip. SIMARIS design automatically generates these characteristic curves to provide exact information about the maximum and minimum short-circuit currents of the associated circuit. Photo 8.3/4 also shows up to which current (Isel kurz) the protective devices are selective to each other. 8/4 Totally Integrated Power by Siemens Subdistribution Systems Photo 8.3/2: Selectivity of the group back-up fuse to the upstream protective devices Photo 8.3/3: Selectivity of the group back-up fuse / miniature circuit-diagram combination Photo 8.3/4: Back-up protection of the group back-up fuse / miniature circuit-breaker 8/5 8 8.4 Small Distribution Boards and Wall- or FloorMounted Distribution Boards All power consumers of a residential building, an administrative building or a factory should be supplied reliably with electricity. In accordance with the operational requirements for all network nodes, low-voltage switchgear, low-voltage distribution boards or controlgear should be configured so that they satisfy the associated conditions of their site of installation, and from which both the connected consumers and also the cable and wires are switched, protected and monitored. The following items are particularly important for the configuration: Ambient and installation conditions Mechanical stress Degree of protection in accordance with DIN EN 60529 Direct contact protection, dust and water protection Ambient temperature and climatic conditions Corrosion exposure Type of installation and fastening (e.g. free-standing, wall attachment) Cover or doors, possibly transparent or non-transparent Dimensions, maximum permitted exterior dimensions of the switchgear Maximum permitted dimensions of the switchgear for transport and installation on site Cable ducts, possibly base cover Cable entry Type of cable installation (cable duct, racks and similar) Device installation (fixed or inserts or withdrawable units for fast replacement) Accessibility of the devices: parts to be accessed during operation, such as fuses, miniature circuit-breakers, etc., should be grouped and arranged within the switchgear assemblies so they are accessible (e.g. using a quick-acting cover). Contactors and fuses should be placed in separate enclosures. Type of installation, accessibility So that the most economical construction can always be selected, before specifying construction measures, the characteristics of the switchgear and distribution boards should be compared with each other and then a decision made. Such characteristics include: Open or closed construction (type of operating area) Self-supporting installation: freestanding in the room, on a wall, or in a niche Non-self-supporting installation: for fastening on the wall, on a mounting structure or in a wall niche Type of access, e.g. for installation, maintenance and operating Dimensions (height, depth, width) Notes concerning construction measures Protective measures Protection against direct contact for an open door in the installation distribution board using contact protection covers, IP30 degree of protection Protection against indirect contact on all frame and covering parts with safety class 1 (protective conductor connection) – Safety class 1 (protective conductor connection) Encapsulations and parts of the weight-bearing metal structure are protected against corrosion using a high-quality surfaceprotecting coating. Metal parts for switchgear and distribution boards must be included in the protective measures using a protective conductor. – Safety class 2 (protective insulation) If switchgear or distribution boards of safety class 2 are used, ensure that the protective insulation applied in the factory is not penetrated by conducting metal parts such as switch shafts, metallic conductor glands, etc. The inactive metal parts within the protective insulation, such as mounting plates and housing of devices may never be connected with the PE conductor or PEN conductor, even when they have a PE connection terminal. If covers or doors can be opened without a tool or key, all touchable conductive parts inside must be placed behind an insulated cover in the IP2X degree of protection. These covers may only be removed using a tool. The looping-through of PE conductors is permitted. 8/6 Totally Integrated Power by Siemens Subdistribution Systems Space requirements for modular installation devices , busbars and terminals For the configuration of rack-mounted modular installation devices in encapsulated switchgear and distribution boards, in particular for box-type distribution boards, in addition to the space required for the devices themselves, sufficient space must be provided for: The voltage distance (clearance in air) to the encapsulation The heat dissipation of the individual devices Any required blow out space for switchgear The wiring The connection of the outer ingoing and outgoing cables (connection space) The device identification A clear designation of the associated devices should be used both in the project documentation and in the completed switchgear assemblies. This is true, for example, also for the association of the fuses to the circuits. Meters/counters and measuring instruments should be placed at eye level. All devices requiring manual intervention should be placed at arm's reach (roughly at a height between 0.6 and 1.8 m). Number of main circuits 2 and 3 4 and 5 6 to (including) 9 10 and more Rated load factor 0.9 0.8 0.7 0.6 Table 8.4/1: Rated load factors (DIN VDE 0660-500 Section 4.8, Table I) Under some circumstances restrictions that result from the use of a device in an encapsulation must be observed, e.g. for the rated current and the switching capacity.* Wiring space After installing the switchgear and distribution boards, the available wiring space for outgoing cables and wires both inside and outside is decisive for the efficient execution of the wiring work. A particularly small encapsulation would initially appear to be very economical to purchase, however, the restrictive wiring space can require such a high installation cost for the initial and later connection of cables that the low price advantage becomes lost. For cables with a large cross section ensure that sufficient space for spreading out the cores and routing is available. Special requirements Special requirements, such as explosion protection, protection against aggressive atmospheres and shocks must be taken into consideration in accordance with the appropriate specifications or as additional agreements. Selection of the electrical equipment For the equipment installed in the switchgear assemblies, the following must be considered: Its associated device specifications The suitability with regard to the rated data, in particular short-circuit strength and capacities Current-limiting protective devices may need to be installed. Rated load factor To prevent an uneconomical overdimensioning of the housing and resources, we recommend the use of the rated load factors (Table 8.4/1) (unless other data has been agreed). The rated load factor must be considered for the determination of the test currents for the temperature-rise test and for the dimensioning of the current paths and devices of the infeed and busbars. Electrical equipment in switchgear and distribution board systems dissipate their heat losses to the surrounding air. To ensure the correct function of this equipment, the prescribed limit temperatures in switchgear must be observed. DIN VDE 0660-507 contains calculation methods, applications, formulas and characteristic data for maintaining the upper limit temperature. * Also see Low-Voltage Controls and Distribution SIRIUS – SENTRON – SIVACON; Catalog LV 1 Order no. E86060-K1002-A101-A6 8/7 8 The observance of the upper limit temperature within switchgear cabinet systems is proved using EN 60439-3 / DIN VDE 0660-504 IEC 60890 / DIN VDE 0660-507 These standards contain calculation methods, applications, formulas and characteristic data for maintaining the upper limit temperature. Figure 8.4/1 shows the general procedure. The correct selection of the various devices to be installed plays a significant role for the dimensioning of subdistribution boards. The following checklists provide help for this important decision. The required parameters from the checklist allow the correct device selection for each circuit. Selection of an appropriate switchgear cabinet system with adequate space for the resources to be installed (e.g. using the catalog) Start Determine the effective heat loss Pv eff in in the switchgear cabinet system Specify the permitted upper air temperature ∆t in the switchgear cabinet system (e.g. ∆t = 20 K) Caution: observe the max. operating temperature of the installed equipment! Selection/specification, whether the selected switchgear cabinet system is suitable for Ps ≥ ∑Pv No Yes Select a larger switchgear cabinet or divide into two or more panels. Other changes to influence the radiating heat loss Ps (switchgear cabinet) by – air conditioning of the switchgear cabinet system – low-loss construction* Proof of observance of the upper temperature limit * Increase the Cu cross-section for busbar systems and wiring of the switchgear End Ps ∑Pv Max. heat radiation loss of the switchgear cabinet Total of the heat loss of the installed switchgear and lines Figure 8.4/1: Steps for determining and maintaining the limit temperature 8/8 Totally Integrated Power by Siemens Subdistribution Systems 8.4.1 ALPHA SELECT Planning and configuration support from the TIP tool platform ALPHA SELECT is the tool for the electrician and switchgear panel builder for building installations. Support is provided for planning, configuring, cost estimating, tendering, order processing and the construction of the various distribution boards. ALPHA SELECT allows the fast and simple selection of SIMBOX small distribution boards, ALPHA meter cabinets, ALPHA distribution boards and ALPHA 8HP insulated distribution systems, including quick-assembly kits, assembly kits, the associated accessories and BETA modular installation devices. Products can also be chosen from the A&D EGH catalog and the CA01 electronic catalog. ALPHA meter cabinets can be chosen in accordance with the regulations of the local power supply network operators or also based on technical criteria. The possibility to hide and display levels (layer display) gives the user an overview of the equipment assignment of the distribution board. In the resulting bill of materials, discounts for individual items or products can be assigned and markups for the installation effort calculated. The output to a project can be customized as required. Electronic export formats (bill of materials as CSV file, graphics as WMF, complete output as PDF), the printing of a tender (optionally with or without integrated drawings) and Photo 8.4/1: Selection of the distribution board system Photo 8.4/2: ALPHA distribution board assembly Photo 8.4/3: ALPHA 8HP insulated distribution board assembly Photo 8.4/4: ALPHA 400-ZS meter cabinet the printing of drawings with frame in the formats DIN A3 or DIN A4 are available as output. It is also possible to include the construction structure in the data output. This can be used, in principle, as a construction plan for building up the distribution board. You can obtain further information from your Siemens contact. ALPHA SELECT can be downloaded from www.siemens.de/alpha-select –> Support 8.5 Circuit Protection Devices The correct selection of the various devices to be installed plays a significant role for the dimensioning of subdistribution boards. The following checklists provide help for this important decision. The required parameters from the checklist allow the correct device selection for each circuit. 8/9 8 Checklist Residual-current-operated circuit-breaker (RCCB) Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... Power supply system (RCCB cannot be used in the TN-C system) Rated voltage Un of RCCB ........................ c c c c c c c c 230 V 400 V 500 V Rated current In of RCCB 16 A 25 A 63 A 80 A 125 A Rated residual current I∆n of the RCCB Protection against direct contact (additional protection) Protection against indirect contact (fault protection) Fire protection (for ground fault current) Disconnect condition in the TT system satisfies the grounding resistance Number of poles ........................ c c c ≤ 30 mA ≥ 30 mA ≤ 300 mA c c c Tripping behavior of the RCCB Instantaneous – standard Short-time-delay – super resistant 2 4 Yes Selectivity requirements c No Selective – staggered arrangement of RCCBs Back-up fuse checked / back-up protection ensured c c c ........................ / ........................ 8/10 Totally Integrated Power by Siemens Subdistribution Systems Checklist Residual current form Tripping range / sensitivity of the residual current device Type A – pulse-current sensitive Type B – universal current sensitive, SIQUENCE Special installation requirements Harsh environmental conditions, SIGRES Frequency range 50 to 400 Hz c c c c .............................................................................. Possibly miniature circuit-breakers selection – see CB checklist Result of residual-current-operated circuit-breaker selection .............................................................................. Series Rated residual current [mA] Pins 500 V 3P+N Rated current [A] Characteristic Type A* S SIQUENCE Type B K SIQUENCE Type B S 2-pin 100/125 A 10 1 30 3 100 300 500 1000 1P+N 3P+N 1 1 16 1 1 25 2 2 40 4 4 4 63 6 6 6 6 6 6 80 7 7 7 100 125 Type A* -6 -6 -6 Special versions SIGRES Frequency 50-400 Hz K 24…125 V AC N-connection left 4 4 6 6 1 1 1 1 -8 -8 -6 -6 8 5 -6 -6 -6 5 5 5 7 5 5 -6 -6 -6 -8 -8 -8 -8 7 7 -6 7 7 7 -6 -6 KK03 KK12 KK01 KK01 KK12 -8 KK12 KL -6 -6 -6 -6 KL -4 -4 -5 KK KK13 KK12 KK01 KK01 3 6 3 3 3 3 4 7 5SM3 4 6 7 8 3 3 3 3 3 3 6 6 6 6 6 6 6 7 6 4 6 2 4 1 1 1 1 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 2 2 2 2 2 4 4 4 4 4 4 4 2 4 2 1 2 2 4 4 4 4 4 4 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 7 7 5SM3 FI 3 30 mA 4 4-pin 4 63 A -6 Type A KK01 K * Type A: AC and pulsecurrent-sensitive fault current acquisition S Version for selective tripping K Super-resistant version 8/11 8 Checklist RCCB module Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... Power supply system (RC cannot be used in the TN-C system) Rated voltage Un of the residual current device Rated current In of the residual current device ........................ c c c c c c 230 V 400 V 0.3 to 16 A 0.3 to 40 A 0.3 to 63 A 80 to 100 A Rated residual current I∆n of the residual current device Protection against direct contact (additional protection) Protection against indirect contact (fault protection) Fire protection (for ground fault current) Disconnect condition in the TT system satisfies the grounding resistance Number of poles ........................ c c c ≤ 30 mA > 30 mA ≤ 300 mA c c c 2 3 4 Yes Selectivity requirements Tripping behavior of the RCCB Instantaneous – standard Short-time-delay – super resistant Selective – staggered arrangement of RCCB modules c c c c c No 8/12 Totally Integrated Power by Siemens Subdistribution Systems Checklist Residual current form Tripping range / sensitivity of the residual current device Type A – Pulse-current sensitive c ......................................................................................... Miniature circuit-breaker selection – see MCB checklist Result of RCCB module selection ......................................................................................... RCCB module: selection table for order no. details Series 10 1 Rated residual current [mA] 30 3 3 3 5SM2 3 100 300 6 6 6 6 6 6 500 1000 2 2 2 2 2 2 2 2 8 Pins 3 4 3 4 3 4 3 4 3 4 4 4 4 6...16 1) 1 2 2 2 5 5 5 5 7 7 7 Rated current [A] 6...401) 6...631) 80...1002) Characteristic Type A 3) Type A 3) -6 -6 -6 -6 -8 -8 -6 -8 -8 Special construction S K 4 7 KK01 7 8 Order no. (MLFB) e.g. 5SM2 3 4 2 -6 KK01 RCCB module 1) 2) 3) 30 mA 4-pin 6..40 A K 2 pins = 2 MW (36 mm); 3 and 4 pins = 3 MW (54 mm); plus the pole number per CB each 1MW 2 pins = 3.5 MW (63 mm); 4 pins = 5 MW (90 mm); plus the pole count per CB each 1.5MW Type A: AC and pulse-current-sensitive fault current acquisition S Version for selective tripping K Short-time delayed, super-resistant 8/13 8 Checklist RCBO – residual-current-operated circuit-breaker with integral overcurrent protection Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... Power supply system (RCBO cannot be used in the TN-C system) Rated voltage Un of the RCBO Rated current In of the RCBO ........................ c c c c c c c c c c c c c 230 V 400 V 6A 8A 10 A 13 A 16 A 20 A 25 A 32 A 40 A 100 A 125 A Rated residual current I∆n of the residual current device Protection against direct contact (additional protection) Protection against indirect contact (fault protection) Fire protection (for ground fault current) Disconnect condition in the TT network satisfies the grounding resistance Conditions/consumers in the circuit Outlets, non-stationary consumers Motors, lamps Transformers, inductances, capacitors Number of poles ........................ c c c ≤ 30 mA > 30 mA ≤ 300 mA c c c c c B C D 2 4 8/14 Totally Integrated Power by Siemens Subdistribution Systems Checklist Selectivity requirements Tripping behavior of the residual current device Instantaneous – standard Short-time-delay – super resistant Selective – staggered arrangement of RCBOs Back-up fuse checked / back-up protection ensured Residual current form Tripping range / sensitivity of the residual current device Type A – Pulse-current sensitive Type B – Universal current sensitive, SIQUENCE c c c c Yes c No ........................ / ........................ c c ......................................................................................... Result of RCBO selection RCBO: selection table for order no. details Rated residual current [mA] Series 10 1 30 3 3 3 3 3 3 3 3 300 6 6 6 6 6 6 6 6 6 6 8 1000 1+N 5 5 5 5 2 4 Pin Switching capacity [kA] 6 6 6 2 2 2 10 4 4 4 4 4 4 4 4 4 4 4 4 4 B/ Type A1) -6 -6 -6 -6 -6 C/ Type A1) C/ Type A1) -7 -7 -7 -7 -7 -7 -6 -7 -7 -7 CB characteristic / RC type Version Rated current [A] 480 V 6 06 06 06 06 8 10 13 16 20 25 32 40 100 125 16 16 20 25 32 40 16 20 25 32 40 16 20 25 K B/ Type A1) S C/ Type A1) S C/ Type B2) K D/ Type B2) K C/ Type B2) S D/ Type B2) S Standard (230 V or 400 V) KK KK KK VK KK FA WK KK AK AK 10 13 08 10 13 10 13 10 5SU1 4 4 7 7 7 7 7 10 13 16 20 25 32 40 82 82 82 82 82 82 -8 -7 -8 BK BK CK 81 81 81 81 Order no. (MLFB) e.g. 5SU1 RCBO 3 30mA 5 6 6 kA A-Char. -6 KK 10 10 A 1+N 1) Type A: AC and pulse-current-sensitive fault current acquisition SIQUENCE Type B: residual current acquisition for: AC, pulse currents und smooth DC fault currents 2) S K Selective Short-time delayed, super-resistant 8/15 8 Checklist Miniature circuit-breaker (MCB) Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... Rated cross section of the circuit Iz in accordance with DIN VDE 0298 T4 (Observe reduction factors with regard to the installation type, bundling and ambient temperature) ........................ mm2 Rated current of the MCB Short-circuit current at the mounting location of the MCB Site of installation accessible for ordinary people (EN 60898) ........................ A Icn of the MCB c c c c 6 kA 10 kA 15 kA 25 kA Site of installation not accessible for ordinary people – Industry (EN 60947-2) Icn of the CB switch Conditions/consumers in the circuit Recommendation for the tripping characteristic Semiconductor, long cable lengths Outlets, non-stationary consumers Motors, lamps Transformers, inductances, capacitors c c c c A B C D Number of conductors (Number of poles, 1, 1+N, 2, 3, 3+N, 4) Selectivity requirements Back-up protection ensured Protection measure / disconnect condition If required,selection of the RCCB – See RCCB checklist ........................ c Yes c No ........................ ........................ / ........................ ......................................................................................... Result of the miniature circuit-breaker selection ......................................................................................... 8/16 Totally Integrated Power by Siemens Subdistribution Systems Checklist Rated cross-section qn mm2 1.5 2.5 4 6 10 16 25 35 Rated current In of the MCB for protection of 2 conductors under load 3 conductors under load A A 16 25 32 40 63 80 100 125 16 20 32 40 50 63 80 100 Iz (line) Permitted continuous load current for 2 conductors under load 3 conductors under load A A 19.5 27 36 46 63 85 112 138 17.5 24 32 41 57 76 96 119 Table 8.5/1: Assignment of miniature circuit-breakers to conductor cross-sections Example: Ribbon cable, multi-core line on or in the wall, installation type C*) at + 30 ºC ambient temperature * Installation type C in accordance with IEC 60364-5-52 / DIN VDE 0298-4. The lines are attached so that the separation between them and the wall surface is less than 0.3-times the external diameter of the lines. Series Depth [mm] Switching capacity [kA] Icn Icu *_ 25 Pins 1+N in 1MW Rated current [A] Char. Suffix 55 5S 70 J*_ Y Y Y Y Y Y Y Y Y Y Y Y Y 6 6 6 6 6 6 6 10 15 1 1 1 2 2 2 3 3 3 3 4 1+N 5 3+N 0.3 0.5 1 01. Jun 2 02 3 4 04 6 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06 8 10 10 10 10 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 50 50 50 50 63 63 63 63 80 100 125 A B -6 -6 -6 C -7 D KS 4 4 5 5 0 0 6 6 14 05 01 15 02 02 6 6 6 6 6 6 14 14 05 05 01 01 15 15 02 02 02 03 03 04 04 04 03 04 14 14 05 05 01 01 15 15 02 02 03 03 04 04 01 15 02 03 03 04 04 04 5S 1 2 08 08 08 08 08 08 08 10 10 10 10 10 10 10 10 10 10 10 10 -7 -6 -7 -8 4 4 4 4 7 7 8*_ 5*_ 5*_ 5*_ 4 4 5*_ 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 4 4 4 4 4 4 5 5 5 5 5 5 5 50 50 50 50 50 50 50 50 50 50 63 63 63 63 63 63 63 63 63 63 80 80 80 91 91 91 92 92 80 80 -5 -6 -7 -8 -6 -7 -7 -6 -6 -7 -6 -7 -8 -7 -8 -8 5S 5S 5S 5S Y Y P P P 1 1 1 1 2 2 2 2 3 3 3 4 4 4 14 05 01 15 02 08 10 5S 5S Series 70 mm Y 4 10 kA 1 1-pin 16 16 A -7 C-Char Suffix *_ Types with special construction for residential buildings *_ Series with high switching capacity up to 70 kA in accordance with EN 60947-2 *_ Universal current version 8/17 8 Checklist Fuses Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... (observe standards, certifications, approvals) System voltage AC up to 400 V up to 500 V up to 690 V > 690 V Utilization category gG – line protection, general protection aM – motor circuits, switchgear protection quick – line protection, general protection slow – line protection, general protection ......................................................................................... ......................................................................................... ......................................................................................... ......................................................................................... DC c c c c c c c c aR/gR/gS semiconductor protection super quick, see SITOR checklist Rated voltage of the fuse Short-circuit current at the mounting location Rated short-circuit breaking capacity of the fuse System NH D (DIAZED) D0 (NEOZED) Cylinder fuses Size 000, 00, 0, 1, 2, 3, 4, 4a DII, DIII, DIV, NDz D01, D02, D03 AC ........................ V ............................. kA AC ........................ kA DC1 ........................ V DC1 ........................ kA Rated current strength 2–1,250 A 2–100 A 2–100 A 2–100 A 10 x 38, 14 x 51, 22 x 58 Selectivity requirements tested Protection measure / shutdown condition tested ........................ ........................ / ........................ 8/18 Totally Integrated Power by Siemens Subdistribution Systems Checklist Installation of the fuse Devices without switching function Fuse holder, fuse socket, fuse bases Devices with switching function 2 Fuse-disconnectors, fuse switch disconnector, switch disconnector with fuse ......................................................................................... ......................................................................................... ......................................................................................... ......................................................................................... Have the operating conditions of the selected protection components been observed? ........................ Is derating required? ........................ Result of the fuse selection ......................................................................................... 1 2 The DC values normally lie below the AC values Observe the rated making and breaking capacity of the switchgear 8/19 8 Checklist SITOR semiconductor safety fuses Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... (observe standards, certifications, approvals) Operating voltage AC up to 690 V up to 1,000 V > 1,000 V DC c c c c c c Limit load integral of the object to be protected (i2t) Switch-off integral of the SITOR – fuse (i2tA) Utilization category C aR – partial-range semiconductor protection C gR – full-range semiconductor protection C gS – full-range semiconductor protection and cable and line protection ......................................................................................... ......................................................................................... ......................................................................................... ......................................................................................... ......................................................................................... Rated voltage of the fuse Short-circuit current at the mounting location Rated short-circuit breaking capacity of the fuse System NH D (DIAZED) D0 (NEOZED) Cylinder fuses Size 000, 00, 0, 1, 2, 3, 4, 4a DII, DIII, DIV D01, D02 AC ........................ V ............................. kA AC ........................ kA DC1 ........................ V DC1 ........................ kA Rated amperage 16–1,250 A 16–100 A 10–63 A 1–100 A 10 x 38, 14 x 51, 22 x 58 Selectivity requirements tested ........................ 8/20 Totally Integrated Power by Siemens Subdistribution Systems Checklist Installation of the fuse Devices without switching function Fuse holder, fuse socket, fuse bases Devices with switching function 2 Fuse-disconnectors, fuse switch disconnector, switch disconnector with fuse ......................................................................................... ......................................................................................... ......................................................................................... ......................................................................................... Direct installation on busbars ........................ Has the derating of the fuse link – device combination been observed? ........................ Operating conditions Varying load of the consumer Varying load factor / derating of the SITOR fuse Temperature range Heat dissipation and cooling adequate ......................................................................................... ......................................................................................... Result of the fuse selection ......................................................................................... 1 2 The DC values normally lie below the AC values Observe the rated making and breaking capacity of the switchgear 8/21 8 Checklist Lightning current and overvoltage protection (LCO) Project name ......................................................................................... Owner/developer ......................................................................................... Planning engineer ......................................................................................... Risk analysis in accordance with DIN EN 62305-2 performed 3-level protection concept with LCO Type 1 / 2 / 3 or 2-level protection concept with LCO Type 2 / 3 ........................ c c ....................... items Number of feeding systems / main distribution boards (MD) Mind connection to ground at the infeed / MD! Total number of subdistribution boards (SD) Mind connection to ground in SD! ....................... items Number of the consumers / final circuits that require special protection ....................... items Lightning current and overvoltage protection Type 1 Number of poles for TN-C systems for TN-S and TT systems c3 c4 Each MD must be tested whether in addition to the main fuse, an additional back-up fuse is required for the overvoltage protection device. Where: Main fuse available? c c Yes > 315 A gG; additional back-up fuse ≤ 315A gG required – spur line wiring, recommended 125 gG Yes ≤ 315 A gG; no additional back-up fuse required – V wiring The devices are normally installed in the MD upstream or downstream of the meter. Installation upstream of the meter requires the agreement of the supply system operator. Lightning current and overvoltage protection Type 2 Number of poles for TN-C supply systems for TN-S and TT supply systems c3 c4 8/22 Totally Integrated Power by Siemens Subdistribution Systems Checklist Each SD must be tested whether in addition to the main fuse, an additional back-up fuse is required for the overvoltage protection device. Where: Fuse available? c c Lightning current and overvoltage protection Type 3 Yes > 125 A gG; additional back-up fuse ≤ 125A gG required Yes ≤ 125 A gG; no additional back-up fuse required A Type 3 surge arrester must be used for each end consumer/circuit that requires special protection. The overvoltage protection devices should be installed as near as possible to the device to be protected. Number of poles for 1 phase for all 3 phases For each Type 3 The surge arrestor must be tested whether in addition to the plant fuse an additional back-up fuse is required for the overvoltage protection device. Where: Fuse / CB 25A B/C present? c c 2 4 c c Yes > 25 A gG; additional back-up fuse ≤ 25A gG required Yes ≤ 25 A gG; no additional back-up fuse required Result of the device selection for lightning current and overvoltage protection ......................................................................................... Fig. 8.5/1: Installation of the overvoltage protection equipment in the TT system (VDE 0100 T534) Fig. 8.5/2: Installation of the overvoltage protection equipment in the TN-C-S system (VDE 0100 T534) 8/23 8 8/24 Totally Integrated Power by Siemens Power Consumers chapter 9 9.1 Starting, Switching and Protecting Motors 9.2 Lighting 9.3 Elevator Systems 9 Power Consumers 9.1 Starting, Switching and Protecting Motors For the planning and selection of the control system and the protection of motors, the relevant standards and regulations have to be observed. These are primarily IEC 60947 (Lowvoltage switchgear and controlgear), VDE 0100, EN 60204-1 and the standards for EMC, EN 61000-3-2 and EN 50082. If switching devices for motors are used in an area in which persons might be endangered, the relevant regulations (safety regulations for workplaces) are to be observed. For further information on the “Requirements for safety at the workplace”, please refer to the Federal Institute for Occupational Safety and Health at www.baua.de/baua/index.htm An overview of the harmonized EU standards is to be found at www.newapproach.org Selection of protective and monitoring devices In a motor feeder, the protective devices have to ensure the protection of the line and the motor. This can be accomplished with separate devices or with a combined device fulfilling both functions. Motor protection can be accomplished with an overcurrent release (motor protection in acc. with IEC 60947), or a temperature sensor (always in the motor winding), or electronic motor protection devices (SIMOCODE). Selection of the switching devices There are the following types of switching devices: Load feeder (protective and switching device, mostly circuitbreaker and contactor) Motor starter (protective and switching device in a casing) Soft starter Frequency converter Except for the load feeder, the switching devices are available for a centralized configuration (mostly IP20) as well as for a distributed one (IP54 to IP65). Device Direct starter, reversing starter (load feeder, motor starter) Advantages High starting torque Fast start-up AC motors can be operated Configuration A combination of centralized and distributed components is absolutely reasonable. In the case of a compact arrangement of motors to be switched, the centralized configuration is advantageous. For the wiring of switching devices and motors, devices with a standardized connection method such as, for example, in ISO 23570, Part 2 and 3, are a maintenance-friendly solution. The individual components can be rapidly installed and replaced. Standardized interfaces remarkably reduce the error rate during installation; moreover, the downtimes during operation are reduced. Disadvantages High starting current Bus-capable Yes Soft starter Starting current is limited Low starting torque Only three-phase motors System perturbations Only three-phase motors Yes Frequency converter Starting current is limited Speed variable at constant torque Yes Table 9.1/1: Switching and protective devices for motors Alternating voltage Category AC-3 AC-4 AC-53a Squirrel-cage motors: switching on / off during operation Squirrel-cage motors: switching on, plugging, reversing, jogging Controlling a squirrel-cage motor with semiconductor contactors Direct voltage Category DC-3 Shunt motors: switching on, plugging, reversing, jogging, dynamic braking Series motors: switching on, plugging, reversing, jogging, dynamic braking DC-4 Table 9.1/2: Protective and switching devices according to utilization categories 9/2 Totally Integrated Power by Siemens Power Consumers Selection according to utilization categories The utilization categories are defined in IEC 60947-4-1, VDE 0660-102. These categories are primarily suitable for the switching of motors. In the case of requirements not covered by a category, one speaks about a mixed operation. For that, an approximative calculation of the service life of the switching devices can be carried out.* * Also see: Siemens AG (Ed.): Switching, Protection and Distribution in Low-Voltage Networks, 4th Edition, Publicis, Erlangen, 1997 Normal starting CLASS 10 (up to 20 s with 350% In Motor) The soft starter's output can be the same as that of the implemented motor Application Starting parameters • Voltage ramp and current limiting – Start voltage (%) – Starting time (s) – Current limit value • Torque ramp – Start torque – End torque – Starting time • Breakaway pulse Stopping mode Conveyor belts Powered rollerconveyors Compressors Small ventilators Pumps Hydraulic pumps 70 10 Deactivated 60 150 10 60 10 Deactivated 50 150 10 50 10 4 x IM 40 150 10 30 10 4 x IM 20 150 10 30 10 Deactivated 10 150 10 30 10 Deactivated 10 150 10 Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Soft stopping Soft stopping Coasting down Coasting down Pump stop Coasting down Heavy starting CLASS 20 (up to 40 s with 350% In Motor) The selected soft starter must have a power class that is 1 class higher than that of the implemented motor Application Starting parameters • Voltage ramp and current limiting – Start voltage (%) – Starting time (s) – Current limit value • Torque ramp – Start torque – End torque – Starting time • Breakaway pulse Stopping mode Stirrers Centrifugal machines Milling machines 30 30 4 x IM 30 150 30 Deactivated (0 ms) Coasting down 30 30 4 x IM 30 150 30 Deactivated (0 ms) Coasting down 30 30 4 x IM 30 150 30 Deactivated (0 ms) Coasting down or DC braking Very heavy starting CLASS 30 (up to 60 s with 350% In Motor) The selected soft starter must have a power class that is 2 classes higher than that of the implemented motor Application Anlaufparameter • Voltage ramp and current limiting – Start voltage (%) – Starting time (s) – Current limit value • Torque ramp – Start torque – End torque – Starting time • Breakaway pulse Stopping mode Large fans Mills Crushers Disk saws/ribbon saws 30 60 4 x IM 20 150 60 Deactivated (0 ms) Coasting down 50 60 4 x IM 50 150 60 80%; 300 ms Coasting down 50 60 4 x IM 50 150 60 80%; 300 ms Coasting down 30 60 4 x IM 20 150 60 Deactivated (0 ms) Coasting down Table 9.1/3: Start-up modes and start-up parameters for soft starters in selected applications 9/3 9 Start-up mode Direct on-line Meaning With the direct start-up mode set, the voltage at the motor is immediately increased almost to line voltage upon the start command. This corresponds approximately to the start behavior with a contactor. The terminal voltage of the motor is increased from a paremeterizable starting voltage to line voltage within an adjustable start-up time. With torque control, the torque generated in the motor is linearly increased from a parameterizable starting torque to a parameterizable end torque within an adjustable torque starting time. Voltage ramp A decisive criterion in the selection of the switches is the communication capability of the devices (instabus KNX/EIB, PROFIBUS, PROFINET, AS-Interface etc.) and thus the possible integration into a process control system. Further points to be considered in the selection of switching devices are the switching frequency (operating cycles/hour) as well as the intermittent service and the start-up mode (direct on-line starting, soft starting). The standard decisive to that is DIN EN 60034-1 Rotating electrical machines – Part 1: Rating and performance. This standard applies all rotating electrical machines except for those being subject to other standards. In the rating and selection of rotating electrical machines, the specification of the load including start-up, electrical braking, no-load operation and breaks as well as their duration and chronological order are especially important. Load feeder and motor starter (direct on-line and reversing starter) These devices are a cost-effective solution for the switching of motors. They ensure a short acceleration time and a high starting torque. There are two variants Electromechanical switching devices Electronic (semiconductor) switching devices With electromechanical switches, the operating mode in acc. with DIN EN 60034-1 (continuous, short-time, intermittent operation, etc.) also has to be observed. If the on-time of the motor is short compared with the start-up time, the load is higher and the switching device therefore has to Torque control Voltage ramp + current limitation In combination with the voltage ramp start-up mode, the starter continuously measures the phase current via an integrated current transformer. A current-limiting value (IB) can be set on the soft starter during the motor ramp-up. When this value is reached, the motor voltage is regulated by the soft starter in such a way that the current does not exceed the set value. Current limitation superimposes the voltage ramp start-up mode. In combination with the torque control start-up mode, the starter continuously measures the phase current via an integrated current transformer. A current-limiting value can be set on the soft starter during the motor ramp-up. When this value is reached, the motor voltage is regulated by the soft starter in such a way that the current does not exceed the set value. The current limitation superimposes the torque control start-up mode. If IP54 motors are used outdoors, their cooling down leads to a condensation of water in the motor (e.g. over night or in winter). This might lead to leakage currents or short circuits, when they are switched on. In order to heat the motor winding, a “pulsating” direct current is supplied without the motor rotating. Torque ramp + current limitation Motor heating (supporting function) Table 9.1/4: Start-up modes for soft starters and their meaning be dimensioned larger. Since the service life of electromechanical switching devices is limited by the number of operating cycles, it is recommended to use electronic switching devices in the case of a high number of operating cycles (continuous switching frequency > 200 operating cycles/hour). Since the inrush currents during the start-up of larger motors are very high with these devices, there are also stardelta startings used for three-phase motors. For that, the motor is oper- ated in star-connection during rampup and then switched over to deltaconnection. Compared to the direct switch-on, the starting current is limited to 2/3. It has to be ensured that the motor has the required voltage endurance for the delta-connection. Soft starters Another option for limiting the starting current is the use of soft starters. Soft starting has the following advantages compared with a load feeder/motor starter: 9/4 Totally Integrated Power by Siemens Power Consumers Current peaks during the start-up are relieved Bumpless start-up Mechanical stress for the load is reduced There must not be any capacitive elements in the motor feeder between the soft starter and motor (e.g. no reactive power compensation system). In order to prevent any failures in the compensation system and/or the soft starter, neither static systems for reactive power compensation nor dynamic PFC (Power Factor Correction) must be used during the start-up and coasting of the soft starter. For the selection of the soft starter it is important to look into the application in depth and take into account the start-up time of the motor. Long start-up times mean a thermal load for the soft starter. With the selection and simulation software “Win-Soft Starter”, all Siemens soft starters can be simulated and selected, taking into account different parameters, such as system conditions, motor data, load data, special application requirements, etc. This software is a valuable tool, its application makes tedious and extensive calculations for determining the suitable soft starters obsolete. Table 9.1/3 suggests sample setting values and device dimensions; these are for information purposes only and not binding. The setting values depend on the application and have to be optimized during the commissioning. Since the soft starter has a reduced starting torque during ramp-up, it is not suitable for all applications. The starting torque of the load has to be smaller or at the most equal the starting torque of the motor. Coasting mode Free coasting Meaning With free coasting, the energy supply to the motor is interrupted via the soft starter upon the cancellation of the on-command. The motor coasts freely, only driven by the mass inertia (centrifugal mass) of the rotor and the load. Torque ramp With torque ramp, the free coasting is extended. This function is set if an abrupt shut-down of the load is to be prevented. This is typical for applications with a small mass inertia or a high load torque (e.g. conveyor belts). Pump coasting Pump coasting is set if the surge pressure upon the switchoff of the pump is to be prevented. Any noise nuisance and mechanical stress to the pipe system and e.g. throttles located in it is reduced. Direct current (DC) braking With DC braking, the free coasting is shortened. For applications with larger mass inertias, use the following formula: Jlast ≤ 5 x JMotor With dynamic DC braking, free coasting is shortened. For applications with smaller mass inertias, use the following formula: Jlast ≤ JMotor Dynamic direct current (DC) braking Combined braking Table 9.1/5: Coaching modes for soft starters and their meaning Typical applications are, for example: Conveyor belts, transport systems: – jerk-free starting – jerk-free braking Rotary pumps, piston pumps: – prevention of pressure surges – extension of the service life of the pipe system Agitators, mixers: – reduction of the starting current Large fans: – protection of the gears and v-belts When using fuses as upstream protective devices semiconductor safety fuses are to be used. In the case of an increased switching frequency, the technical data of the manufacturer are to be observed at any rate. The aver- age switching frequency is approx. 20 operating cycles/hour. For soft starters, different start-up and coasting modes may be parameterized. The specific regulations of the device manufacturer have to be observed for the planning. These refer to installation notes, selection of the higherlevel switching and protective devices. 9/5 9 Motor torque (M) Nm M Direct on-line starting (maximum torque that can be generated) A further advantage of frequency converters is the option of regenerative feedback into the system. Note: Frequency converters are also available for single- and two-phase AC motors. 1 2 3 Acceleration torque Speed (n) min -1 M Nom Parameterizable start voltage Peculiarities of frequency converters System perturbations The harmonic currents and voltages generated in the converter distort the sine curve of the voltage. Since the loads are designed for sinusoidal voltages, a distortion of the voltage might lead to interferences and even the destruction of loads and electrical equipment. Therefore, the respective standards specify limit values for the individual harmonics as well as for the total distortion factor THD. Some standards only state limit values for the voltage (e.g. EN 61000-2-2 and EN 61000-2-4), others for voltage and current (e.g. IEEE 519). Due to the continuously increasing use of variable-speed drives, the evaluation of system perturbations becomes more and more important. The operators of supply networks as well as those of variable-speed drives increasingly demand statements on the harmonic behavior of the drives so they can check already at the planning and configuring stage if the limit values required by the standards are kept to. For a limitation of the system perturbations, line reactors or active filters are to be used. Line reactors are usually required for systems with a high short-circuit load (no impedance), several converters at one common system connection point, 1 2 3 M Soft start Short ramp time M Soft start M Load (e. g. Fan) Longer ramp time Parameterizable torque starting time Motor has run up and is in nominal operation ( n Nom ). The runup is detected and the bypass contacts close. Fig. 9.1/1: Function principle of voltage ramp / torque curve Motor torque (M) Nm M Direct on-line starting (maximum torque that can be generated) Parameterizable limiting torque M Nom Parameterizable start voltage 1 2 3 Acceleration torque Time (t)s 1 2 3 M Soft start Torque-controlled and limited M Soft start Parameterizable ramp time M Load (e.g. Fan) Torque-controlled Motor has run up and is in nominal operation ( nNom ). The runup is detected and the bypass contacts close. Fig. 9.1/2: Function principle of torque control Frequency converters Frequency converters are used for adapting the speed in order to protect the mechanics or to reduce the current peaks, as with the soft starter. Frequency converters are also more suitable for dynamic processes than soft starters. The speed of the connected motor can be changed continuously and almost loss-free by varying the voltage and frequency. Moreover, with a frequency converter, a motor can be operated beyond the rated speed without the torque sinking. 9/6 Totally Integrated Power by Siemens Power Consumers IPE without line filter (Category C4) IPE with line filter (Category C3) IPE with line filters (Category C2) IPE Ø Ø Ø IPE IPE Fig. 9.1/3: High-frequency leakage or interference currents on the line-side PE connection subject to the line filters converters in parallel operation, converters equipped with line filters for radio interference suppression. Active Front End (AFE) converters generate hardly any system perturbations. They are the ideal solution for utility companies and operators with high system requirements. The performance range is 37 to 6,000 kW. High-frequency radiation and EMC In accordance with the definition of the EMC Directive, the electromagnetic compatibility describes “a device's capability of working satisfactorily in an electromagnetic environment without causing any electromagnetic interferences itself which would be unacceptable for other devices existing in this environment”. As to ensure that the relevant EMC regulations are complied with, the devices need to have a sufficiently high interference immunity on the one hand and on the other hand the interference emission has to be limited to agreeable values.* The EMC requirements for variablespeed electrical drives are defined in EN 61800-3 Adjustable speed electrical power drive systems – Part 3: EMC requirements and specific test meth- ods. A variable-speed drive system (Power Drive System, PDS) in the sense of this standard consists of the propulsion converter and the electric motor including the connecting cables. The driven machine is not part of the drive system. The EMC product standard EN 61800-3 defines different limit values depending on the installation site of the drive system. For a reduction of the radiations, line filters are used. The line filters also limit the system perturbations. As to ensure that the line filters achieve the highest impact, the installation has to be made in accordance with the EMC requirements. So that the interference currents can flow back to the converter again on a low-inductive path, a shielded cable between the converter and motor is required. The motor cable should have a symmetrical conductor design for that. The magnitude of the high-frequency leakage currents depends on numerous drive parameters. The most important influencing factors are the following: Magnitude of the intermediate circuit voltage UZK of the converter Rate of voltage rise du/dt when switching Pulse frequency fP of the inverter Converter output with or without motor choke or motor filter Characteristic impedance ZW or capacity C of the motor cable Inductivity of the grounding system and all grounding and shielding connections The length of the motor cable should also be paid attention to. The cable capacitites which are increasing with the length, especially with shielded cables, cause additional current peaks. This current then has to be supplied additionally by the frequency converter, which might lead to a shutdown of the converter. * For further information on the EMC: Siemens AG (Ed.): Totally Integrated Power Application Manual – Basic Data and Preliminary Planning, 2006 9/7 9 9.2 Lighting 9.2.1 People in the Office – Development of New Office Forms In a fast moving world of labor and business, the spatial situation as well as the requirements of the persons using the rooms are changing as rapidly. At many workplaces,workstations are configured and changed subject to the composition of the team. Flexible working hours and flexible job locations, non-territorial offices and mobile workstations make new demands on the architecture of our workplaces. The company building becomes more and more a communication site, a place where employees can meet and exchange information. Coming to the fore are meeting zones, conference rooms and catering areas, in which teams can get together for formal or informal meetings. Administrative buildings have thus become more complex. Furthermore, building owners always demand the homogeneous overall appearance of their building architecture matching the corporate design. From the building face to the reception area, from cellular to open-plan offices, from the areas with public traffic to the representative manager's office, all zones have to match the company. Architects become all-rounders who have to plan the colors, furniture, light and climatic conditions of the whole system. In this system, the focus is on an efficient work situation. The employees are to find a motivating and performance-enhancing atmosphere. Part of that is of course also a functional as well as attractive work and experience environment. Therefore, flexibility is also required for the development of lighting concepts. Lighting, after all, is an important part of the overall system of “office building”. It allows for a good vision and well-being at work and influences the sensual experience character of the architecture and the individual rooms. 9.2.2 Light Quality for a Flexible World of Labor – Lighting of Workplaces in Interior Rooms In recent years, the recommended standard values for the illuminance of indoor workplaces have been increased considerably, also because it is easier today to implement better vision conditions at work cost-effectively, with improved lamps and their operating devices, luminaires and system engineering. This was combined in several DIN 5035 standards “Artificial Lighting” as well as since 2003 in the European standard DIN EN 12646 “Lighting of Workplaces”. In order to ensure the quality of lighting, the visual function, the visual comfort and the visual ambiance have to be harmonized with each other and with the room use. The visual function is influenced by the illuminance level and the glare limitation. For the visual comfort, especially color rendering and harmonious brightness control play a role. The visual ambiance is determined by the light color, the light direction and the shadiness. In order to be and remain flexible, it is also important today to take measures ensuring the employees' safety and health at work, no matter where and how they work. Photo 9.2/1: Telenor – non-glaring ELDACON microprism technology Photo 9.2/2: Infineon Campeon – lighting solution for flexible room use 9/8 Totally Integrated Power by Siemens Power Consumers 9.2.3 Light Between the Priorities of Energy Efficiency and Light Quality The combination of flexibility, health and well-being is connected with a holistic concept of light quality – a concept which takes into account not only the compliance with the requirements of lighting technology but also esthetic, ergonomic and architectural criteria as well as the individual emotional expectations of the people. The separate switchability and dimmability of individual components, for example, provides for modifiable light ambiances in interior rooms. Here, the first lighting component is the room light which is defined as light reflected by ceiling and wall areas. The second component is the directly radiating light for functional and work surfaces. Switchability and dimmability mean that a modification of the illuminance and light colors is achieved. These basic components take into account the interaction of light, room and people. The following requirements for the lighting system have to be taken into account: Nominal illuminance (lx) Photo 9.2/3: High illuminances with a light effect similar to daylight Photo 9.2/4: Light bands running in parallel are mounted above assembly lines. They ensure a uniformly high illuminance level in the assembly area and provide an incidence of light which prevents irritating reflected glare on the metal surfaces. Adequate illuminance Sufficient uniformity of brightness Favorable shadow effect Prevention of glare Matching light color and color rendering Adequate illuminance The illuminance depends on the type of visual task. Precision work requires higher illuminances than rough work, dark objects a higher one than bright objects. In general, performance and work pleasure increase with the illuminance increasing, while acci- dents, faults and scrap decrease and the fatigue diminishes. The Workplace Regulation “Artificial Lighting” (ASR 7/3) specifies the minimum values for the nominal illuminance depending on the type of room or work (see Appendix A6). A rough estimate of the illuminance is possible with the installed power of the lighting fittings or lamps. Table 9.2/1a shows how much Watts per square meter of the base area of a room have to be installed approximately when using fluorescent lamps Lamp type Incandescent lamp Halide lamp Fluorescent lamp High-pressure mercury-arc lamp Indium-amalgam fluorescent lamp (3-band lamp) High-pressure sodium-vapor lamp Halide metal-vapor lamp Factor 4 1.6 1 0.8 Installed power/base area of the room (W/m2) Lights approx. 2 m above Lights approx. 3 m above Lights approx. 4 m above the area to be illuminated the area to be illuminated the area to be illuminated 1,000 750 500 300 200 100 50 50 38 25 15 10 5 3 60 45 30 17 11 6 3 64 48 32 19 13 6 4 0.6 0.5 0.5 Table 9.2/1a: Nominal illuminance subject to the installed power/m2 when using fluorescent lamps Table 9.2/1b: Factor subject to the lamp type 9/9 9 (not 3-band lamps) in order to obtain the required illuminance. In the case of an illumination with other lamp types, the value calculated with this table has to be multiplied with a corresponding factor (Table 9.2/1b). The general illumination is determined as the average value of evenly distributed reading points at a measuring height of 0.85 m. In walkways, the measurement is carried out on the floor or up to a maximum of 0.2 m above that at several points along the way – namely along the center line. Uniformity of brightness Favorable viewing conditions exist when the environment of the workstation is slightly less bright than the workstation itself. In accordance with DIN 5035, the brightness differences in the closer area of the visual object are not to be bigger than 1:3. A local uniformity is achieved with a sufficient number of lamps at not too great distances to each other and at a height as large as possible. A bright wall and ceiling paint adds to that. Very suitable for that are fluorescent lamps arranged as light bands. These should be installed in viewing direction. With a sufficient, uniform general illumination, additional workplace illumination is often unnecessary. If each point of the room is to be available as workplace, a high degree of uniformity across the entire room is to be striven for. The illuminance is not to be less than 60% of the nominal value at any of the workplaces. Brightness differences due to different reflectance coefficients in the workspace are absolutely desired with a uniform illuminance, they are important for information purposes. Shadow effect The shadow effect supports the recognition of an object and its surface structure. Therefore, the illumination should not be too poor in shadows, the shadow depth (shadiness) should nevertheless be low. The shadow edges are to taper off softly. Drop shadows – these are points at the workplace which do not get any direct light at all – are to be strictly avoided. The use of lamps with a large luminous surface, supported by the reflection of the light at bright ceilings and walls, complies with this requirement. The differences of the brightnesses in the shadow area and in the adjacent surface directly irradiated by the light are usually so big that the visual function is clearly reduced in the shadow area. A completely diffuse illumination as workplace lighting is to be objected to since it does not provide any shadiness and therefore impedes the recognizability of surface structures. The main part of the light at the workplace is to incident sidewise from the top in order to prevent annoying shadows of the body. With workplaces predominantly oriented to daylight, the direction of the incidence of light and the light distribution of the artificial lighting are to be designed in accordance with the day lighting, e.g. same direction of the incidence of daylight and artificial light. In only a few areas of application, the disadvantages of a shadeless lighting have to be accepted in order not to put at risk successful work, e.g. when checking the color differences in the graphic arts industry. Here, directed lighting might lead to the formation of gloss and thus impede the checking. Glare Too high differences in luminance in the visual field create a glare. A distinction is made between direct and reflected glare. The reflected glare should be prevented especially at computer-screen workstations. Suitable for that are particularly lamps whose luminous flux is emitted by a larger surface, e.g. fluorescent lamps in connection with covers based on the ELDACON technology. Glare can be prevented or reduced by the following: Arrangement of the light source as far outside the viewing direction as possible Lamps with a scattering casing, e.g. grid surfaces, frosted glass, softboxes Arrangement of the fluorescent lamps light bands in parallel to the viewing direction Selection of lamps with a low luminance, e.g. fluorescent lamps instead of incandescent lamps Use of matt surfaces (prevention of reflected glare) Photo 9.2/5 The combination of directly and indirectly radiating illumination creates a comfortable light atmosphere of room and working light 9/10 Totally Integrated Power by Siemens Power Consumers Light color – color rendering The human eye is adapted to the natural sunlight with respect to the color assessment. For this reason, the objective of the lighting technology has to be the imitation of the spectral composition of daylight by artificial Light color Warm white Neutral white Daylight white Area of application High red proportion, similar to incandescent lamp Suitable for workrooms, offices and sales rooms To be used with high illuminances Table 9.2/2: Light colors for fluorescent lamps in acc. with DIN Lamp Lamp technology Positive Efficient lamps, e.g. T16 fluorescent lamps, halide metal-vapor lamps Electronic ballast (EB) Lamps easy to clean, low soiling tendency Efficient optics, e.g. ELDACON Negative Incandescent lamps Operating devices Service & maintenance Magnetic ballast (MB) Lamp with high soiling tendency Operating efficiency Inefficient optics Light management Switchability of the system Dimmability of the system Presence of persons Variable light packages Building management technology Positive Switchable in groups Daylight-dependent constant light regulation Presence/motion detector switching Multipower operation Integration into facility management system Negative Only switchable as a whole Fixed artificial light setting Static switching Fixed light packages Isolated maintenance group Daylight Room surfaces Incidence of daylight Positive White/bright surfaces, clean rooms Daylight can be dosed and directed (e.g. sunblinds) Daylight systems (full-time non-glaring exploitation of the daylight): prismatic and reflective systems Negative Dark surfaces, dirty rooms Simple, static darkening (e.g. sunscreen, simple blinds) Closed architecture Table 9.2/3: Quick check for energy efficiency lighting. An illuminated object can only appear in its natural color if the corresponding color components are contained in the inceding light. The comfortableness is subject to the light color. White light creates a more active day feeling. Decisive for the light color is the color temperature, measured in Kelvin (K). The higher the color temperature, the larger the blue portion of the light. This is the reason why incandescent lamps seem more yellow up to red compared to daylight. With fluorescent lamps, the light color depends on the type of luminescent material. For workrooms, a neutral white light color is preferred. Bright, warmly toned walls support the good color impression of a room. With a very low illuminance, a warm light color is more suitable than a cold one. In order to receive a rendering similar to daylight, the color daylight white in connection with illuminances of more than 1,000 Lux are required. Different light colors in the same or in adjacent rooms are to be avoided. Energy efficiency Intelligent lighting starts in the head: energy-conscious building and renovating – in view of the necessity of economically and ecologically sensible action, this task concerns all of us. 9/11 9 Light management EM (illuminance) Glare Shadiness Luminance conditions Color rendering Light atmosphere, light color Individuality Table 9.2/4: Quick quality check Positive Adequate illuminance No glare Balanced shadiness conditions Balanced Natural colors (as in daylight) Comfortable light atmosphere, e.g. due to a balanced ratio of direct and indirect light User setting options (privacy) Negative Illuminance too low Direct and reflected glare Drop shadows, purely diffuse light Strong bright-dark transitions Falsified colors Unpleasant “cave effect”, unexpected light color (evening blue) Preset, no individual setting There is a need for action in most cases: the lighting systems either waste energy or run counter to basic ergonomic and thus qualitative rules. The European Directive 2002/91/EC An important basis for energy saving is the evaluation of the total energy performance of buildings, requested in the European Directive 2002/91/EC and to be put into national legislation. In Germany, the prestandard DIN V 18599 on the “Energetic evaluation of buildings” was developed in preparation for the energy conservation ordinance EnEV 2006. For the opening up of the energetic savings potential, Siteco has developed concepts and solutions matched specially to the implementation of the EU Directive 2002/91/EC. Light solutions going hand in hand with the legislation and at the same time taking to heart further quality criteria such as ergonomics, glare effect, color rendering and illuminance. The Siteco Energy Quick Check gives first recommendations in this respect. The quality of the luminous flux is of prime importance for new buildings and the redevelopment of older buildings. It is especially important to make sure that the daylight and artificial light form a sensible unit, increasing the energy efficiency. When selecting the illuminants, it is important that their light efficiency per unit is as high as possible (Lm/W) and they therefore achieve a good luminosity at a low energy consumption. Technology A high illuminance level and at the same time nonglaring light are desirable but seem to be opposed requirements. The ELDACON technology combines both by a patented light conduction method via high-precision microprism structures. The light of high-efficient 16 mm fluorescent lamps is distributed nonglaringly in the room. At the same time, ELDACON allows for a geometric 9.2.4 Innovative Light Technology Light conduction The ELDACON light conduction technology ensures a high degree of illuminance at the workplace without the source of light appearing dazzling. The light of two T16 fluorescent lamps (T5) is conducted from the optical system directly to the work surface via a precise microprism structure. Reflected glare and direct glare are reduced to a minimum. The luminous surfaces appear homogenous and convey a crystal-clear, bright and brilliant esthetic impression. Photo 9.2/6: The ELDACON light conduction technology ensures a high degree of illuminance at the workplace without the source of light appearing dazzling 9/12 Totally Integrated Power by Siemens Power Consumers format which sets new standards in so far as the height is concerned. ELDACON was developed specially for trendsetting office lighting solutions. Application Happy light for life and work: optimum lighting conditions obey certain principles subject to the work situation and room characteristics. The quality of the artificial light is especially important at places where there is hardly any daylight or where people also work at night. Light solutions based on the ELDACON technology create lighting conditions which increase the job performance and lift the spirits. And since nowadays flexibility and variation at the workplace are in demand, lamps with ELDACON and the furniture can be arranged in the room absolutely freely – and that with a light quality at a constantly high level. For rooms with high requirements for the direct glare limitation, Siteco developed the High Definition Prismatics (HDP). Apart from the use in offices, HDP lamps are most of all suitable for the lighting of communication areas, workshops, charge offices, libraries, catering areas, or waiting zones as well as classrooms and auditoriums. The HDP technology is therefore designed for normative UGR (Unified Glare Rating) values of 19 or less. Mirrortec mirror-projector technology The principle is simple: the light of a projector is focused to a facet mirror. The curved mirror surfaces reflect the light non-glaringly to the surface to be illuminated. Siteco first implemented this technology under the name “Mirrortec” and has developed it further for a number of applications in the meantime. Mirror-projector systems consist of the following: Photo 9.2/7: Light conduction via Mirrortec technology Photo 9.2/8: Conventional reflector technology (left) – microstructure of the Fresnel mirror (right.) A mirror as (facet) secondary reflector At least one high-power spotlight A pole or system beam Projector In order that the light exactly hits the mirror or reflection surface and does not radiate beyond that, the projectors need to have both a bundling characteristic and a high degree of efficiency. Mirror reflector With the reflection via convex or concave reflector facets, the light can be distributed very exactly. Aluminum-coated calottes are used as reflector material. Fresnel technology For an exact light distribution as well as maintenance and installation, Siteco developed new reflection surfaces based on vaporized microstructures. This Fresnel technology allows for reducing three-dimensional mirror facets to almost twodimensional structures. Reflectors with 30 to 40 mm high facets can thus be replaced by a 2 mm thin plastic plate made of polymethyl methacrylate (PMMA) – the reflector is thus almost plane. An anti-scratch coating ensures longterm protection; moreover, the smooth surface of the reflection surface can be easily cleaned. At the same time, reflectors in Fresnel technology are a compact, easy-to-install solution with an exact and uniform light distribution. The mirror with the plane PMMA microstructure is preconfigured for the most different lighting situations. The material is very thin and light. The reflection surface is brilliant and conveys a high value. The microstructure allows for new, fascinating design options for the light fitting, for light and shadow as well as for the light distribution. With the Fresnel technology, the distribution around the pole known from the lighting planning is an ideal quadratically illuminated surface. High-precision illumination is no problem with this technology. Application Since the light source and reflector are separated, the mirror-projector systems offer a variety of options in large rooms and also outdoors – 9/13 9 Photo 9.2/9: Barajas airport, Madrid: here, the Fresnel technology was used successfully for the first time. Richard Rogers' design was about a ceiling doing without any revision areas. A flat and light secondary mirror in the skylights performs the illumination of the terminal areas. Photo 9.2/10: New country house in Tyrolia, Innsbruck: the daylight reaches even the most bottom floors by using a mobile prism system and micro sunscreen rouvers. Photo 9.2/11: The plenar hall in the Maximilianeum, Munich: a highly effective, prismatic daylight system was installed in the 470 m2 glass roof. It reflects the “hot” direct sunlight and thus prevents any glare effects and an impairment of the room climate. functional as well as esthetical. Therefore, the mirror-projector technology is more and more often used where sophisticated and architecturally integrated light solutions are demanded. Daylight systems In architecture, the natural daylight is rated high. In architectural concepts, this appears with an increased use of the daylight via fully glazed fronts, glass-roofed inner courtyards and skylights. This development is carried by realizations on the human wellbeing in the daylight and its health effect as the pulse generator for the biological rhythm. Various aspects of energy saving also play a role here. At the same time, the increased use of the daylight results in increased requirements for the sun protection of a building and the glare protection for workplaces. Daylight systems direct diffuse light into the depth of the buildings and create a uniform illuminance in the room. They protect against direct solar radiation and thus against a high entry of heat energy, especially in the summer months. After all, they prevent glare at the workplace via luminance reduction and allow for a high-quality illumination of computer-screen workstations. Fundamental idea The light of the sun is a basic requirement for any life. It determines our rhythm of life and supports the wellbeing. Daylight imparts important knowledge on climate, space and time. Only in the daylight can we see objects in their natural color. Light and shadow create space but also point up the time over the day and year. Nevertheless, daylight also means heat which leads to unpleasant room temperatures especially in the summer. It has extreme variations in brightness which are hard to compensate for. The high daylight densities create glare which especially impairs work at computer screens. Daylight systems exploit the advantages of the daylight and compensate for its disadvantages. They make daylight calculable without destroying its information content. System advantages Daylight systems create a comfortable room climate via – limitation of the room heating in the summer, – limitation of the glare without darkening the room, – improvement of the light distribution. Daylight systems help to save energy via – reduction of the on-times of lamps, – low expenditure for ventilation and air-conditioning. Daylight systems offer new creative options. The reasonable integration of the daylight not only reduces the energy consumption but also increases our well-being at the workplace. Natural and artificial light complement one another in terms of a comfortable, harmonic atmosphere. 9/14 Totally Integrated Power by Siemens Power Consumers LED – the new light source A new light source establishes itself step by step in more and more light applications: the light-emitting diode (LED). The luminous semiconductor chip has already established itself for example in the dashboard lighting of cars, illuminated billboards, or as status and signal displays in electric and electronic devices. Nevertheless, the lighting of traffic facilities, representative buildings, in department stores or hotels also gains in importance steadily. LEDs are increasingly used for the illumination of offices and in the private living area. Special office lamps with an integrated LED technology can light with a uniformly illuminated light surface in any number of dynamically changing colors. The color change mode can be set individually. Flexible tube LEDs set a purposeful accent by creating curved lines of colored light and can be integrated in architectural elements in this form. Extraordinary features The small size of the LEDs results in a high degree of design freedom in the development of lamps. The control of the radiation angle can be implemented very efficiently with small optics. LEDs are today manufactured with a light efficiency of up to 75 lumens per Watt (lm/W) in the color Before Retrofitting Illuminance Lamp service life Operating time p.a. Connection value Number of lights Relative current costs white. With that, LEDs today provide light efficiencies higher than those of halide lamps. In the near future, LEDs will be available with ratings in the range of 100 lm/W and will thus almost reach the power of fluorescent lamps. Since LEDs radiate their light only in a half space and conventional light sources in most cases require an additional reflector which clearly limits the degree of efficiency of these systems, the actual light efficiency of the LEDs is far higher than that of conventional light sources. Photo 9.2/12: LEDs in the office area for more energy efficiency and more atmosphere: warm-white light reaches work and action areas while daylight-white, cooler light radiates indirectly to the top. The external effect of buildings at night can be designed with additional low-power LEDs. After 3 x 14 W T16, ECG 515 lx 16,000 h 1,800 h 1.67 kW 36 51% 4 x 18 W T26, KVGTD 490 lx 7,500 h 1,800 h 3.31 kW 36 100% Energy-saving with better lighting conditions: 49% Table 9.2/5: Modern energy efficiency with respect to light quality 9/15 9 9.2.5 Room and Light Types of lighting for offices and administrative buildings Light illuminates and stages rooms; lighting types are tools for that. Apart from the compliance with technical and functional rules, standards and guidelines, lighting is also about creating an esthetic environment, generating good moods, and increasing the well-being of the people. The modern working environment with its mobile team work, recreation areas and flat screens requires new light solutions. Today, there are numerous light systems with various light effects available for good illumination in office and administrative buildings: from the classical, directly radiating recessed luminaire via directly/indirectly radiating surface-mounted luminaires, pendent luminaires or foot lamps with a variable light distribution up to computer-controlled light systems. When selecting the appropriate type of lighting, the connection of visual function, visual comfort and visual ambiance have to be taken into account. There are three lighting concepts used for the illumination of offices. These concepts can be implemented via different types of lighting. Lighting concepts Room-related lighting Uniform lighting of the entire room: this is to be preferred if the arrangement of the workspaces is not known in the planning phase or if the arrangement of the workspaces is to be flexible. Light variants: directly radiating ceiling light, directly/indirectly radiating pendent light. Workspace-related lighting A different illumination of workspaces and the immediate surroundings is to be preferred if several workspaces of a room have different viewing tasks and therefore require a different illuminance level. Also suitable if “work islands” are to be separated from each other optically. Light variants: directly radiating ceiling lights, directly/indirectly radiating pendent lights, workspace-oriented lights with a special ELDACON light technology, indirectly radiating illumination with directly radiating single-user lamps / foot lamps and table lamps. Subarea-related lighting In addition to a workspace-related or room-related “basic lighting”, workspace lights can be used to implement an illuminance level in a subarea adapted to the viewing task or individual wishes. DIN 5035-8 contains requirements/recommendations for workspace lights. Based on these specifications, workspace-oriented lights with a special ELDACON light technology, indirectly radiating illumination with directly radiating singleuser lamps / foot lamps and table lamps are especially suitable here. Application examples Office workplaces Flexible lighting with a non-glaring Siteco ELDACON technology for the Infineon headquarters Campeon, a center of the information and science society. The design and arrangement of the Campeon buildings reflect Infineon's ambition as an IT company with a partly virtual character. A flexible room design and communication were the core demands on the interior design. And also on the lighting: Siteco's complete solution is based on the principle of freedom and high- Photo 9.2/13: Infineon headquarters Campeon value light quality. The name Campeon stands for a concept of work in the future – an open, functional environment with a campus character allowing for the fast exchange of knowledge. Many of the employees work in teams whose members are distributed all over the world, working together via electronic data connections and staying in the Campeon often only for a limited time. Due to changing team compositions and a flexible arrangement of the furniture, the decision was made in favor of lights with ELDACON technology for the offices. The light of approx. 6,700 foot lamps and approx. 1,800 pendent luminaires with ELDACON technology is conducted from the optical system directly to the work surfaces via precise microprism structures – and that non-glaringly. Each workplace has a foot lamp standing next to it which can be freely arranged in the room – and with a light qualitity at a constantly high level (Photo 9.2/15). Together with the foot lamp, the light modules with an angular aluminum profile form a creative unit and an efficient illumination supporting innovation, i.e. responding to the light requirements of the individual persons. All meeting zones in the core 9/16 Totally Integrated Power by Siemens Power Consumers Room-related lighting Workspace-related lighting Subarea-related lighting Photo 9.2/14: The planning of a lighting system requires detailed technical knowledge and a structuring of the building in various areas, utilizations and requirements. areas of the modules come up with the ultra-flat light modules in prestigious design, also relying on the suspended mounting variant. This solution also allows for a completely free arrangement of the lights in the room, irrespective of the arrangement of the furniture (Photo 9.2/16). In the computer centers, louvered lamps with a BAP65 mirror louver provide for a comfortable room atmosphere and at the same time for high luminances. Translucent, illuminated end caps create an interesting light effect. The BAP65 mirror louver with a direct/indirect light distribution (30% indirect proportion) enriches the 9/17 9 Photo 9.2/15: ELDACON technology … Photo 9.2/16: … for non-glaring light Photo 9.2/17: Modular light band systems illumination of the areas surrounding the workplace. Recessed luminaires with diffuser optics provide light for the sanitary facilities. Industrial workplaces In the Audi plant in Ingolstadt, modular light band systems, hall area lights (4 x 80 W) and modern mirror-projector technology create very good, balanced lighting conditions. Referring to a hall in the car body construction, 15,900 m2 of logistics and production area each plus offices, social rooms and staircases are illuminated energy-efficiently and at the same time with a high-quality lighting technology. The assembly areas were supposed to be illuminated from the driveways as far as possible in order to ensure continuous assembly work. Therefore, the decision was made in favor of the use of 4-lamp hall area lights (4 x 80 W) mounted at a height of eight meters. Thus, assembly areas with a width of up to eight meters can be illuminated with 300 lx from both sides of the driveways. Therefore, only the storage places and the wider hall areas or areas with platforms have to be equipped with additional assembly line lights (Photo 9.2/17). The combined use of DUS assembly lights and hall area lights in the production area as well as the use of light bands also create balanced lighting conditions via a high vertical portion of the light in the logistics area (DUS IP20) and in the offices (DUS Plus). In the open, lobby-like architecture of the offices with the connected staircase, the Mirrortec technology ensures highest degrees of efficiency and a uniform illumination in the radiation area. With their high-quality, reduced design, the projector 400 and the mirror 5NW139 with Fresnel technology constitute a formal unit and allow for an exact definition of the radiation area. Downlights with VirtualSource reflector technology provide an additional visual comfort in this building area at a high degree of efficiency (Photo 9.2/18). Apart from the compliance with the normative requirements, the lighting solution with relatively high, uniform illuminance levels and high vertical surfaces adds to increasing the wellbeing of the employees and to positively influence the productivity of their work. Photo 9.2/18: Mirrortec technology for a uniform illumination 9/18 Totally Integrated Power by Siemens Power Consumers 9.3 Elevator Systems 9.3.1 Overview of the Planning The timely planning of the conveying systems for large and complex buildings has a great importance for the total planning. It is often the case that although elevators complying with the building regulations and standards are planned, in many cases a later traffic analysis states that the planned elevator capacity is not sufficient for a satisfactory conveyance of persons and freight. Nevertheless, in most cases the planning has already advanced so far that the required changes are no longer possible and no more than compromise solutions can be found. How- ever, this should not be the sense of planning. 9.3.2 Configuration of Elevator Systems The functionality of a building is determined most of all by the conveyor systems. The correct dimensioning and arrangement of passenger or freight elevators contributes considerably to the attractiveness and rentability of the building. OTIS provides competent and comprehensive consultancy for the selection of the conveyor system. Elevators or escalators? For the conveyance of persons, the question is when to use elevators, escalators, or moving walkways complementing one another. For overcoming large conveyor heights, e.g. in office and administrative buildings or hotels, elevators are used. With high volumes of traffic and small conveyor heights (department stores, railroad stations, exhibition grounds, or airports), escalators and moving walkways provide a continuous operational readiness and a high conveyor capability. A practical combination with elevators for the conveyance of older or handicapped people and baby carriages ensures a smooth traffic flow. Determination of the required conveyor capacity Especially for complex buildings, the required conveyor capacity (number of persons to be transported within a five-minute interval based on the total occupancy of the building) should be determined at an early planning stage with a traffic analysis. This ensures Type of building Product recommendation Passenger elevators without machine room Gen2 Comfort Gen2 Flex Gen2 Premier Gen2 Premier ED Passenger elevators with machine room Gen2 Lux OTIS 2000 H Individual elevators Bed elevators Freight elevators Goods eleSmall vators and goods underground elevators elevators Escalators OTIS OTIS 506 NCE 513 NPE Moving walkways OTIS OTIS 606 NCT 610 NPT Residential buildings Premium residential buildings Existing buildings Office and administrative buildings Hotels Hospitals, senior citizens’ homes Department stores, shopping centers Industrial buildings and warehouses Community facilities, parking garages Public traffic areas ••• Optimal solution ••• • •• •• •• • • • •• ••• ••• • • • ••• ••• ••• ••• • ••• ••• ••• ••• ••• ••• •• •• ••• • ••• ••• • • •• •• ••• •• •• •• •• •• ••• ••• ••• ••• ••• ••• ••• •• ••• ••• •• Just recommendable Universally applicable systems Table 9.3/1: Selection criteria for OTIS passenger elevators, escalators and moving walkways 9/19 9 that the planned number and performance (load-carrying capacity, rated speed and group arrangement) of the elevator systems assures an optimum conveyance of persons and freights in the building. In Austria, for example, a conveyor capacity calculation is mandatory. Basic data for a traffic analysis are the building type and height, number of floors and their use as well as the maximum number of persons in the building. A simplified traffic analysis for a project can be carried out with e*direct = “Online planning” at www.otis.com. You will receive a first recommendation for the number and type of elevators of the OTIS product range. Furthermore, OTIS provides personal, individual and competent support. Further planning steps Not only the number and capacity of the elevators play a role in the elevator planning. Also the shaft situation, drive type, door design and control are to be determined individually. Moreover, the relevant regulations and guidelines have to be observed. Registration of elevator systems at the respective authority via a central regulatory agency Implementation of a safety-related evaluation (e.g. acceptance of a new system or inspection of existing systems) Determination of the maintenance intervals / inspection periods Determination of the intended use of elevator systems Notification of the respective authority in the case of accidents Elevator Directive (95/16/EC) European directive (law) regulating the minimum requirements for elevators newly put in circulation. This directive has been implemented in Germany as the Twelfth Ordinance Regulating the Equipment Safety Act (12. GSGV) and in Austria as Ordinance Regulating the Safety of Elevators (ASV 96). Machinery Directive (98/37/EG) European directive (law) for the erection of, for example, hoisting platforms and elevators in accordance with the guidelines for handicapped persons. In Germany, it has been implemented as the Ninth Ordinance Regulating the Equipment Safety Act (9. GSGV) and in Austria by the Ordinance Regulating the Safety of Machinery. EN 81 Safety-related rules for the construction, erection and operation of elevator systems. Building regulations of the federal states In Germany and Austria, each federal state regulates the constructional implementation such as, for example, the smoke exhaust openings of elevator shafts , the engine room design, when to install an elevator and which size it has to have. These specifications differ from state to state. Federal Water Act (WHG) This German act states rules, requirements and tests which have to be complied with when handling waterendangering substances. Energy Conservation Ordinance (EnEV) This ordinance demands a closure of the building envelope. This means that, for example, smoke exhaust openings of elevator shafts must be closed until the time when an opening is mandatory in the case of a fire. Sample Directive on Fireproofing Requirements for Line Systems (MLAR) The Directive on Fireproofing Requirements for Line Systems (MLAR) is to be observed when installing the elevator control in escape and rescue routes (corridors or staircases). It demands a separation of the control via components made of non-combustible material with a (proven) fire resistance rating of 30 minutes. This is achieved, for example, with a fire-resisting housing of the elevator control, or the installation of the elevator control in a niche of the building closed with a fire-resisting door. Fire protection European guidelines and the various building regulations of the federal states regulate the fire protection in elevator construction. Measures for fire protection in elevator systems are always required when the shaft separates fire areas. Elevator shaft In accordance with DIN 4102, the shaft has to be surrounded by walls 9.3.3 Regulations and Guidelines – Overview Safety always comes first with elevators. This applies to the elevator users as well as to the elevator as a workplace. In Germany, there are binding regulations on the erection and operation of elevator systems. The most important regulations are described in the following. Ordinance on Industrial Safety and Health (BetrSichV) The BetrSichV regulates requirements for the erection and operation of elevator systems and substantiates especially the following operator obligations: 9/20 Totally Integrated Power by Siemens Power Consumers corresponding to the fire resistance rating F90 (and therefore withstand a fire for 90 minutes). At the same time this means that glazed elevators do not comply with the requirements of fire protection. It is additionally demanded that the transmission of smoke to other floors via the shaft is prevented. This is achieved via a shaft ventilation; the EnEV is to be observed for that. In most cases, a shaft head opening of at least 2.5% of the shaft base or at least 0.1 m2 is considered to be sufficient. Fire resistance of shaft doors EN 81-58 constitutes test methods for the determination of the fire resistance of shaft doors. The objective is to prevent the propagation of fire via the elevator shaft. Shaft doors made of glass are unsuitable as fire protection doors. Elevator car In order to prevent the propagation of fire via the elevator car, the material selection for the lining of the elevator car is stipulated in an amendment to DIN 18091: The highest permissible amount of combustible material is 2.5 kg/m2 of the interior surface of the elevator car. The materials used have to comply with at least fire protection class B in accordance with DIN 4102-1. Firemen's elevators Apart from the regulations of the regional fire departments, EN 81-72 states safety rules for the construction of firemen's elevators. The requirements given here substitute the details of the TRA 200 marked with (F). Note: In the case of a fire, the firemen's elevators are no rescue elevators for persons within the building, but are only used by the firemen for firefighting especially in high-rise buildings. It is recommended to contact the responsible fire department before installing any firemen's elevators to be able to observe local, extended fire regulations. Behavior of elevators in the case of fire EN 81-73 regulates the behavior of elevators in the case of a fire. The objective of this standard is to inform the firemen that no persons are trapped in the elevators and exposed to smoke and fire. The general rule is that elevators must not be used in case of a fire. Noise protection Elevator systems make operating noise that generates airborne and structure-borne sound in the building. In order to achieve a sufficient noise protection, special demands are made on the building construction and the elevator system. In order to implement a sufficient and at the same time economically acceptable noise protection, a close cooperation between the contractors responsible for the planning and execution of construction work and the elevator manufacturer is required already in the planning phase. Note: The OTIS elevator systems comply with DIN 4109 for housing technology systems if the shaft walls have been designed in accordance with this standard by the customer and if VDI guideline 2566 has been observed. DIN 4109 – noise protection in building construction DIN 4109 regulates the permissible maximum values for noise pressure levels in buildings and contains specifications for the building construction. VDI 2566 – noise reduction in elevator systems This guideline consists of two parts applying to elevators with (Part 1) or without a machine room (Part 2). In accordance with that, the elevator manufacturer is obliged to observe the specified values for the airborne and structure-borne sound for the sound emissions caused by the elevator system. The objective of this guideline is also to specify measures for reducing the propagation of airborne and structure-borne sound. VDI 4100 – noise protection in apartments This guideline defines higher requirements on rooms in need of protection. In accordance with that, living rooms or bedrooms should not adjoin directly to elevator shafts or machine rooms. Further regulations and guidelines The construction and installation of new elevator systems are regulated by further laws apart from the ones stated so far. These are, among others: DIN EN 81-28 This standard which is valid all over Europe stipulates features for emergency call systems. It has to be ensured that an emergency call is forwarded to a permanently manned place via a 2-way communication system and that the trapped person does not have to take any further action. Note: The OTIS REM emergency call system complies with all requirements stated here and at the same time improves the safety and reliability of the elevator system, as it is a remote monitoring system. 9/21 9 Gen2 Comfort 4 6 8 12 13 Duty kg 320 500 630 920 1,020 Duty kg 630 630 800 800 1,000 1,000 Duty kg 1,275 1,275 1,600 1,,600 1,800 1,800 2,000 2,000 2,000 m/s 1 1 1 1 1 Drive (without control) input power in kW 3.0 4.4 5.1 7.8 8.6 Drive (without control) input power in kW 5.8 8.6 7.2 10.5 8.7 12.8 Drive (without control) input power in kW 11.3 19.1 12.4 20.9 13.2 21.9 16.3 24.9 26.8 the safe operation of their elevator systems. DIN EN 13015 This standard stipulates the requirements a maintenance company should fulfill. Only companies certified in accordance with this standard can ensure a qualified maintenance of elevator systems. OTIS is certified by RWTÜV. Gen2 Premier 8 8 10 10 13 13 m/s 1 1.6 1 1.6 1 1.6 9.3.4 Configuration of Escalators and Moving Walkways The functionality of a building is determined most of all by the conveyor systems. The correct dimensioning and arrangement of escalators and moving walkways contributes to the attractiveness and thus the rentability of a building. Areas of application Due to the different requirements, escalators and moving walkways are designed for two areas of application: industrial buildings (department stores or the like) and public traffic areas (e.g. railroad stations). The latter makes clearly higher demands due to longer periods of operation and more severe operational demands. Determination of the required conveyor capability The required conveyor capability of escalators and moving walkways should be determined at an early planning stage with the help of a traffic analysis. In that, first of all the theoretical conveyor capability is taken. This results from the rated speed of the system and the step or pallet width. With a width of 1,000 mm and a speed of 0.5 m/s, the theoretical conveyor capability is 9,000 persons per hour. Nevertheless, Gen2 Premier ED 17 17 21 21 24 24 26 26 26 Table 9.3/2: Electrical parameters m/s 1 1.6 – 1.75 1 1.6 – 1.75 1 1.6 – 1.75 1 1.6 1.75 EN 18030 (Draft) This regulation draft is to substitute the old DIN 18024/25 as regards elevators. It partly stipulates specifications deviating from DIN EN 81-70. In detail, it has to be checked exactly which specifications have to be observed for the implementation of the elevator system. DIN EN 81-70 This standard deals with the requirements for the handicapped-accessible equipment of elevator systems. It applies to new as well as to existing systems and is to provide more mobility for handicapped people. Ordinance on Industrial Safety and Health The Ordinance on Industrial Safety and Health not only applies to new systems but especially to operators of elevator systems. The operator obligations have been tightened seriously, since the operators are responsible for 9/22 Totally Integrated Power by Siemens Power Consumers the actual conveyor capability depends on the user behavior when entering the escalators or moving walkways. At a speed of 0.5 m/s, it is approx. 70% of the theoretical value. Note: For industrial buildings, a simplified traffic analysis can be carried out with e*direct “Online planning” at www.otis.com, with a first recommendation for the number and arrangement of the escalators of the OTIS product range. OTIS also provides personal help for detailed technical planning. Further planning steps Not only the area of application and the conveyor capability of the escalators and moving walkways play a role in the planning but also the arrangement or the operating mode. Moreover, also regulations and guidelines have to be observed. Regulations and guidelines Regulations and guidelines not only affect the actual products but also the local environment in order to ensure the highest possible degree of safety of the users. OTIS escalators and moving walkways comply with all national and international safety requirements (EN 115 / ANSI / CSA) as well as the national standards in Germany. Machinery Directive Escalators and moving walkways are machines in the sense of the European Machinery Directive 98/37/EC and have to meet the safety requirements specified in it. In Germany, this directive was put into national legislation in the Ninth Ordinance Regulating the Equipment Safety Act (9. GSGV). European standard DIN EN 115 – Safety rules for the construction and installation of escalators and moving walkways The objective of this standard is to stipulate safety rules in order to protect persons from accident risks during operation and during maintenance and monitoring works. This standard applies to all escalators and moving walkways to be newly installed. ZH1/4845 – Guidelines for escalators and moving walkways of the Association of commercial and industrial workers' compensation insurance carriers These guidelines address the operators of escalators and moving walkways. They contain protection goals and safety measures. Workplace Ordinance Building regulations of the federal states The building regulations of the individual federal states stipulate additional requirements for the environment of the system, e.g. the installation of handrails by the customer. BGVR: Regulations and rules for safety and health at work by the workers' compensation insurance carriers Extensive information on and tools for the configuration and planning of elevators and escalators www.otis.com 9/23 9 OTIS GeN2™ Comfort The elevator for residential buildings and functional office buildings The machine-room-less GeN2 Comfort is based on the innovative concept of steel-core-sheathed polyurethane (PU) belts.This high-quality elevator system is very economic, comfortable and extremely reliable. Due to the very good cost/performance ratio, it is perfectly suitable for functional residential and commercial buildings. The GeN2 Comfort provides ride comfort at a low energy demand. It is environmentally friendly, reliable and safe and optionally also provides a reduced shaft head of 2,500 mm or 2,600 mm. Your advantages: Smooth, comfortable elevator rides Reduced shaft head of 2,500 mm or 2,600 mm possible at low construction costs and without any optically distracting building superstructures High, load-independent stopping accuracy (± 3 mm), no trip hazards for passengers Gearless drive More economic than elevators with gear drive machines Very good cost/performance ratio Very environmentally friendly Reduced wear at a considerably longer service life of the belts compared to conventional steel ropes Saving of the machine room Highest possible safety via an electronic belt monitoring (PULSE™ system) around the clock Optimized integration in the building Minimized structure-borne noise transmissions Reduction of the static load of the shaft walls Fast installation process Automatic rescuing of persons in the case of a power failure (optional) Load capacity: 320 – 1,020 kg (4 – 13 persons) Speed: 1.0 m/s Max. travel height: 45 m with up to 16 stops 9/24 Totally Integrated Power by Siemens Power Consumers Telescopic sliding door, opening to the right (mirror-inverted door design possible) Access from one side Other floors TF / TRF – door portals Accesses on both sides Other floors TF / TRF – door portals Floor with control unit TF / TRF – door portals MRF – door frame MRF – door frame MRF – door frame * Control unit SF wall connection frame SF wall connection frame SF wall connection frame Centrally opening sliding door Access from one side Other floors TF / TRF – door portals Floor with control unit Accesses on both sides Other floors TF / TRF – door portals TF / TRF – door portals MRF – door frame MRF – door frame MRF – door frame * Control unit SF wall connection frame SF wall connection frame SF wall connection frame * Flexible arrangement possible after consulting OTIS. Table 9.3/2: Layout diagrams for GeN2 Comfort 9/25 9 Elevator size Car dimensions Clear car width LKB (mm) Clear car depth LKT (mm) Door Clear passage LD (mm) Shaft dimensions Clear shaft width LSB (mm) 1,340 1,530 1,490 1,590 Clear shaft depth LST1) (mm) 1 access 1,340 Car dimensions handicapped-accessible In acc. with EN 81-70 Type 1: 1,000 mm x 1,250 mm Type 2: 1,100 mm x 1,400 mm Load capacity and number of persons Type Clear In acc. with (DIN 18024/25) shaft depth or LST1) (mm) DIN 18030 LBO 2 accesses 1,440 4 pers., deep car 320 kg, 1 and 2 accesses 6 pers., standard car 450 kg, 1 access 480 kg, 2 accesses 6 pers., deep car 480 kg, 1 access 500 kg, 2 accesses 8 pers., deep car 630 kg, 1 and 2 accesses 12 pers., wide car 900 kg, 1 access 920 kg, 2 accesses 13 pers., deep car 1,000 kg, 1 access 1,020 kg, 2 accesses 800 1,100 TLD TLD 700 800 800 800 850 900 800 900 800 900 900 1,000 1,250 CLD 1,800 1,530 1,580 1,670 1,600 1,670 1,800 1,990 1,900 Type 1 1,000 1,300 TLD 1,540 1,640 Type 1 TLD 1,100 1,400 CLD TLD 1,400 1,500 CLD TLD 1,100 2,100 CLD 1,640 1,740 Type 2 1,740 2,000 1,600 1,670 1,800 1,990 1,840 Type 2 800 900 800 900 2,340 2,440 Type 2 Table 9.3/3: Shaft dimensions GeN2 Comfort Counterweight with and without gripping device 1) Clear shaft depths apply to doors on the floor; if doors in the shaft: + 100/150 mm with access from one side + 200/300 mm with accesses on both sides after selection of the door model and consulting OTIS Abbreviation LKB LKH LKT LSB LST LD LTH DR TLD CLD K S Designation Clear car width Clear car height Clear car depth Clear shaft width Clear shaft depth Clear passage Clear door height Outside call Telescopic door Centrally opening door Shaft head Pit Elevator in accordance with Lifts Directive 95/16/EC 9/26 Totally Integrated Power by Siemens Power Consumers Speed (m/s) 1.0 Max. travel height (m) 45 Shaft head K* Clear door height LTH (mm) 2,000 2,100 Clear car height LKH (mm) 2,100 2,200 2,200 2,300 Speed (m/s) 1.0 K (mm) LKH + 1,200 Number of persons 4 pers. S min. (mm) 1,150 S max. (mm) F (kN) 30.0 36.5 Travel height 6 pers. 8 pers. 1,050 12 pers. 13 pers. F = largest concentrated load 1,400 45.5 57.0 63.0 Table 9.3/4: Dimensions GeN2 Comfort Counterweight with gripping device for accessible spaces below the shaft Door on the floor Pit S Door at the pit *) Reduced shaft head (2500 mm or 2600 mm) possible on request Elevator groups Elevator groups with up to three individual elevators possible: for further details, please contact your OTIS contact person. Fig. 9.3/3: Vertical section GeN2 Comfort 9/27 9 OTIS GeN2™ Premier The elevator for the highest demands in exclusive hotels and exalted residential and office buildings GeN2 Premier, the machine-room-less elevator of the second generation: steel-core-sheathed polyurethane (PU) belts have superseded conventional steel ropes. The result is an elevator with extremely smooth, comfortable and quiet rides providing a unique ride comfort at a low energy demand. The GeN2 Premier meets the highest demands and sets new standards with respect to comfort, economic efficiency, reliability and safety. Your advantages: Silent and smooth elevator rides Optimum ride comfort High, load-independent stopping accuracy (± 2 mm), no trip hazards for the passengers Reduced shaft pit possible Gearless drive Up to 50% more economical than elevators with gear drive machines Very environmentally friendly Reduced wear at a considerably longer service life of the belts compared to conventional steel ropes Saving of the machine room Highest possible safety via an electronic belt monitoring (PULSE™ system) around the clock Minimized structure-borne noise transmissions Large performance range Three-dimensional door zone monitoring possible Automatic rescuing of persons in case of a power failure (optional) Load capacity: 630 – 1,025 kg (8–13 persons) Speed: 1.0 m/s and 1.6 m/s Max. travel height: 75 m with up to 24 stops 9/28 Totally Integrated Power by Siemens Power Consumers Telescopic sliding door, opening to the right (mirror-inverted door design possible) Access from one side Other floors TF / TRF – door portals Floor with inspection panel TF / TRF – door portals Accesses on both sides Other floors TF / TRF – door portals * MRF – door frame Inspection panel MRF – door frame MRF – door frame SF wall connection frame SF wall connection frame SF wall connection frame Centrally opening sliding door Access from one side Other floors TF / TRF – door portals Floor with inspection panel Accesses on both sides Other floors TF / TRF – door portals TF / TRF – door portals * MRF – door frame Inspection panel MRF – door frame MRF – door frame SF wall connection frame SF wall connection frame SF wall connection frame * Flexible arrangement possible after consulting OTIS. Fig. 9.3/5: Layout diagrams for GeN2 Premier 9/29 9 Elevator size Car dimensions Clear car width Clear car depth LKT Door Shaft dimensions Clear shaft width Clear shaft depth Clear shaft depth Car dimensions handicapped-accessible In acc. with (DIN Load capacity and number of persons LKB (mm) Type Clear passage (mm) TLD LD (mm) 800 900 800 900 900 800 900 800 900 800 900 900 LSB (mm) 1,600 1,670 1,800 2,000 1,900 1,900 2,000 1,600 1,670 1,800 2,000 2,150 LST1) (mm) LST1) (mm) 1 access 2 accesses 18024/25) or DIN 18030 LBO In acc. with EN 81-70 Type 2: 1,100 mm x 1,400 mm 8 Pers., deep car 630 kg, 1 access 650 kg, 2 accesses 10 Pers., wide car 800 kg, 1 access 820 kg, 2 accesses 1,100 1,400 CLD TLD 1,660 1,780 Type 2 1,350 1,400 CLD TLD 1,700 1,780 Type 2 13 Pers., deep car 1,000 kg, 1 access 1,025 kg, 2 accesses 1,100 2,100 CLD 2,380 2,480 Type 2 13 Pers., wide car 1,000 kg, 1 access 1,025 kg, 2 accesses 1,600 1,400 CLD 1,100 2,400 1,700 1,780 Type 2 Table 9.3/5: Shaft dimensions GeN2 Premier Counterweight without gripping device 1) Clear shaft depths apply to doors on the floor; if doors in the shaft: + 100/150 mm with access from one side + 200/300 mm with accesses on both sides after selection of the door model and consulting OTIS. Abbreviation LKB LKH LKT LSB LST LD LTH DR TLD CLD K S Designation Clear car width Clear car height Clear car depth Clear shaft width Clear shaft depth Clear passage Clear door height Outside call Telescopic door Centrally opening door Shaft head Pit Elevator in accordance with Lifts Directive 95/16/EG. 9/30 Totally Integrated Power by Siemens Power Consumers Speed (m/s) 1.0 1.6 Max. travel height (m) 402) 75 Shaft head K* Clear door height LTH (mm) 2,000 2,100 Clear car height LKH (mm) 2,200 2,300 Speed (m/s) 1.0 1.6 K (mm) LKH + 1,180 LKH + 1,400 Travel height Number of persons 8 10 13 S min.3) (mm) 1,0 m/s 1,120 2) S max.3) (mm) 1,6 m/s 1,400 F (kN) 67.1 86.8 100.0 F = largest concentrated load Table 9.3/6: Dimensions GeN2 Premier Counterweight without gripping device Door on the floor Pit S Door at the pit 3) 2) If travel height > 40 m at 1 m/s, please contact OTIS. Reduction of the pit possible on request. 3) Elevator groups Elevator groups with up to three individual elevators possible: for further details, please contact your OTIS contact person. Fig. 9.3/6: Vertical section GeN2 Premier 9/31 9 OTIS GeN2 Premier ED The elevator for the highest demands with high load capacities as of 1,275 kg GeN2 Premier ED is the large elevator of the second generation that doesn’t require a machine room: steel-coresheathed polyurethane (PU) belts have superseded conventional steel ropes. The GeN2 Premier ED without machine room provides superior technology at a load capacity of 1,275 kg and more. Apart from extremely smooth and quiet rides as well as the unique ride comfort, it provides flexible door and car heights and variable car dimensions. The GeN2 Premier ED meets the highest demands and sets new standards with respect to comfort, economic efficiency, reliability and safety. Your advantages: Silent and smooth elevator rides Optimum ride comfort High, load-independent stopping accuracy (± 2 mm), o trip hazards for the passengers Gearless, regenerative drive Up to 50% more economic than elevators with gear drive machines Flexible door and car heights Variable car dimensions Very environmentally friendly Reduced wear at a considerably longer service life of the belts compared to conventional steel ropes No machine room required Highest possible safety via an electronic belt monitoring (PULSE™ system) around the clock Minimized structure-borne noise transmissions Reduction of the static load of the shaft walls Large performance range Three-dimensional door zone monitoring possible Three speeds selectable Load capacity: 1,275 – 2,000 kg (17–26 persons) Speed: 1.0 m/s; 1.6 m/s and 1.75 m/s Max. travel height: 75 m with up to 24 stops 9/32 Totally Integrated Power by Siemens Power Consumers Telescopic sliding door, opening to the right (mirror-inverted door design possible) Access from one side Other floors SF – door portals Accesses on both sides Other floors SF – door portals Floor with inspection panel Inspection panel * Centrally opening sliding door Access from one side Other floors SF – door portals Accesses on both sides Other floors SF– door portals Floor with inspection panel Inspection panel * * Flexible arrangement possible after consulting OTIS. Fig. 9.3/8: Layout diagrams for GeN2 Premier ED 9/33 9 Elevator size Car dimensions Clear car width LKB (mm) Clear car depth LKT (mm) Door Clear passage LD (mm) Shaft dimensions Clear shaft width LSB (mm) 2,020 Car dimensions handicapped-accessible In acc. with (DIN 18024/25) or DIN 18030 LBO In acc. with EN 81-70 Type 2: 1100 mm x 1400 mm Type 3: 2000 mm x 1400 mm Load capacity and number of persons Type Clear shaft depth LST1) (mm) 1 access 2,550 Clear shaft depth LST1) (mm) 2 accesses 2,640 17 Pers., deep car 1,275 kg, 1 und 2 accesses 17 Pers., wide car 1,275 kg, 1 access 1,275 kg, 2 accesses 21 Pers., deep car 1,600 kg, 1 und 2 accesses 1,200 2,300 TLD 1,100 Type 2 2,000 1,400 CLD 1,100 2,700 2,800 1,650 1,740 Type 3 1,400 2,000 2,100 2,350 2,400 1,700 TLD 1,300 2,320 2,700 2,650 1,950 1,850 1,850 2,740 2,040 1,940 1,940 Type 2 Type 3 Type 3 Type 3 21 Pers., wide car 1,600 kg, 1 und 2 accesses 24 Pers., wide car 1,800 kg, 1 und 2 accesses 26 Pers., deep car 2,000 kg, 1 und 2 accesses 26 Pers., wide car 2,000 kg, 1 und 2 accesses CLD 1,600 1,600 CLD 1,100 2,800 1,200 3,050 1,500 2,700 TLD 1,300 2,370 2,950 3,040 Type 2 2,350 1,700 CLD 1,200 3,050 1,950 2,040 Type 3 Tabelle 9.3/7: Shaft dimensions GeN2 Premier ED Counterweight with and without gripping device 1) Clear shaft depths apply to doors on the floor; if doors in the shaft: + 100/150 mm with access from one side + 200/300 mm with accesses on both sides after selection of the door model and consulting OTIS. Abbreviation LKB LKH LKT LSB LST LD LTH DR TLD CLD K S Designation Clear car width Clear car height Clear car depth Clear shaft width Clear shaft depth Clear passage Clear door height Outside call Telescopic door Centrally opening door Shaft head Pit Elevator in accordance with Lifts Directive 95/16/EG. 9/34 Totally Integrated Power by Siemens Power Consumers Speed (m/s) 1.0 1.6 1.75 Max. travel height (m) 452) 75 75 Shaft head K Clear door height LTH (mm) 2,000 2,100 2,200 2,300 2,200 3) – – Clear car height LKH (mm) 2,300 2,300 2,400 2,400 2,400 2,400 2,500 2,500 2,500 Speed (m/s) 1.0 1.6 1.75 Travel height K (mm) LKH + 1,350 LKH + 1,650 LKH + 1,750 S min. (mm) Speed (m/s) Door Counterweight without gripping device Counterweight with gripping device 1,275 kg 1,600 kg 1.0 2) Door on the floor 1,800 kg 2,000 kg 1,240 1,400 1,450 1,275 kg 1,600 kg 1,420 1,150 1,710 1,310 1,810 1,360 1,800 kg 1,420 1,710 1,810 - 2,000 kg 1,420 1,240 1,710 1,400 1,810 1,450 1.6 1.75 CLD TLD CLD TLD CLD TLD 1,150 1,310 1,360 Pit S Number of persons 17 21 24 26 F (kN) 125.0 147.0 155.0 161.0 2) If travel height > 45 m at 1 m/s, please contact OTIS. If LKH 2200 mm, then S + 100 mm 3) Door at the pit on angle bracket Table 9.3/8: Dimensions GeN2 Premier ED Counterweight without gripping device Counterweight with gripping device for accessible spaces below the shaft Elevator groups Elevator groups with up to four individual elevators possible: for further details, please contact your OTIS contact person. Fig. 9.3/9: Vertical section GeN2 Premier ED 9/35 9 9/36 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering chapter 10 10.1 Power Management with SIMATIC powercontrol 10.2 Building Management System 10.3 Energy Automation for the Industry 10.4 Safety Lighting Systems 10.5 Robust Remote Terminal Unit for Extreme Environmental Conditions (SIPLUS RIC) 10 Ease of Operation, Safety and Control Engineering 10.1 Power Management with SIMATIC powercontrol Power management is an integrative solution concept, that also makes provisions for system expansion using components that can be flexibly combined. It permits operating cost optimization by increasing the energy efficiency. Taking account of changing internal and external operating conditions, energy flows and energy costs are analyzed with regard to their ecological and economic aspects, and savings potential is indicated. Power management measures and archives the consumption of various energy types, such as electricity, gas, water, heat, refrigeration, etc., produces status and fault reports, and displays them in an operator control and monitoring system. operating state. The follow-up costs for abnormal operating states are kept as low as possible. Detailed information on incidents and malfunctions of the power distribution within the plant/building permit fast and targeted fault rectification. Documentation and archiving of switching actions and energy flows. Error and incident messages (e.g. operating sequences) with the precise date and time; logging permits the subsequent analysis of downtimes and fault patterns and developments. Analysis possibilities for the optimization of energy consumption and cost Comparison possibilities of all characteristic quantities using load curves and reports 10.1.1 Functions and Advantages of Power Management Transparency of the complete power distribution system Graphical display of the operating states (switches, valves, …) Currently measured values online Comprehensive overview of the state of the power supply and its switching states. Fast responses are made to operational changes; prompt response to changes of the Automation Ethernet PROFIBUS Power distribution Routing distribution board Bus-capable interface Fig. 10.1/1: Power management with SIMATIC powercontrol; consistent data from the acquisition through to the analysis 10/2 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering The display of the mutual dependencies creates transparency. Savings potential can be determined by interpreting the minimum and maximum values. Status-controlled maintenance using limit value messages and alarms Signaling of maintenance intervals using limit value messages and alarms for maintenance-relevant measured quantities and operating states. Energy cost allocation to organizational units or cost centers which actually caused consumption, based on the energy measurements, e.g. for the further processing in analysis programs Supported analyses with cyclical or event-controlled reports Monitoring and comparison, e.g. of consumption values by means of predefined standard analyses. Leak- age losses, shrinkage, etc., with high follow-up costs consequently can be detected fast targeted, and at low in a fast and targeted way cost. Data export or linking for further processing (analysis tools, MES, …) Directly acquired values: current, voltage, frequency Calculated values: power, cos ϕ, THD, etc. – Pulse and analog inputs Current and voltage Power consumption Processing level SIMATIC powercontrol with automation system SIMATIC S7-300, SIMATIC S7-400 or SIMATIC WinAC Contiguous data acquisition Data conditioning and short-term archiving Visualization level SIMATIC powercontrol, SIMATIC powercost based on SIMATIC WinCC Transparent display of energy flows and costs Currently measured values and switching states Analysis windows with load curve displays (e.g. year, month, freely configurable) Configuration dialog for parameterization rather than programming included Supported first configuration Very simple adaptation to changing plant conditions Switchgear Siemens offers a comprehensive device range within the fuse-protected and circuit-breaker-protected technology at the low-voltage level. Options available include switching devices with (auxiliary/alarm) switches for the status acquisition and release or motor drives for the switching of the switching devices (see Table 10.1/1 and 10.1/2). 10.1.2 Components of the Power Management System in Low-Voltage Applications Power management in the electrical power distribution can be structured into three levels: Acquisition level Protective and switching devices provide status information Switching and control devices are triggered Multifunction measuring equipment provides comprehensive data Status Withdrawable unit Auxiliary switch Switch OFF Undervoltage release, voltage release X X X X ON/OFF Auxiliary switch OFF Voltage release OFF ON ACB MCCB MPCB MCB RCCB SD 3WL… 3VL… 3VF… 3RV… 5SY… 5SP4… 5SM3… 3KA… 3KE… 630 – 6,300 A 16 – 1,600 A 16 – 100 A 0.16– 100 A 0.3– 80 A 80 – 125 A 16 – 125 A 63 – 630 A 250 – 1,000 A X X X X X X X X X Released Alarm switch Status Switch X X X X X X X X X X X X X X X On request Abbreviations: ACB Air Circuit-Breaker MCCB Molded Case Circuit-Breaker MPCB Motor Protection Circuit-Breaker MCB Miniature Circuit-Breaker RCCB Residual Current-Operated Circuit-Breaker SD Switch-Disconnector Table 10.1/1: Circuit-breaker-protected technology ON/OFF/RESET Motor drive X X X X 10/3 10 Status ON/OFF Auxiliary current switch Withdrawable unit Auxiliary current switch Switch Fuse tripped Alarm switch Status Switch OFF ON ON/OFF Motor drive 10.1.3 Typical Implementation of Planning Tasks within the Power Distribution Planning documents describe not only the devices to be used, but also the quantities to be measured within an electrical power distribution. There are various solution concepts for the implementation of these tasks in switchgear cabinet design. These solution concepts reflect, for example, company guidelines, customer requirements, service aspects, cost specifications. The following sections discuss outgoing circuits/supply circuits consisting of a protective device and a measurement system. Protective devices include all devices of the fuse-protected and circuit-breakerprotected technology. Measurement systems are all devices with communications capability plus current converters. If a bus system is used, its specific requirements must be observed. FSD 3NP… 3NJ4… 3NJ5… 3NJ6… 3KL… 3KM… 5SG7… 5SG5… 5SF… 2 – 630 A 2 – 1,000 A 2 – 1,250 A 2 – 630 A 2 – 630 A 2 – 400 A 16 – 100 A 16– 63 A 2 – 100 A X X X X X X X X SDF X X FB On request Abbreviations: FSD Fuse Switch-Disconnector SDF Switch-Disconnector-Fuse FB Fuse Block Table 10.1/2: Communication-capable devices Digital signals Measurements U L1-N L1 cos L1 PS OFF ON U L3-1 U L1-2 * N Voltage Power Status W S Bezug U L3-N U L2-3 U L2-N L3 L2 Current cos S SS Switching QS Phase displacement Status Switch Measurements cos L3 cos L2 Spannung Strom Phasenverschiebung Leistung / Arbeit Communication-capable SENTRON 3WL… mit COM15 SENTRON 3VL… mit COM10 circuit breakers Motor protection and control devices Multifunction measuring instruments Multifunction protection with controller Meter SIMOCODE DP SIMOCODE pro SENTRON X X X X X X X X X X X X X X X X X X X X X Work W S Lieferung Communication-capable circuit breakers Circuit-breakers with integrated communication are the best solution for new systems. The acquisition of the measured values is an integrated part of the circuit breaker. The measured values are displayed on the release and made available using the communication function. The remote control is also performed using this communication function. Other characteristics: No additional wiring expense for status monitoring and control High data efficiency coupled with good accuracy X X X X X X X X X X X X X X X X X X SIPROTEC Pulse output Bus interface X X X X X X Table 10.1/3: Fuse-protected technology Metrology Siemens offers a comprehensive device range within the metrology for the medium- and low-voltage level. The appropriate options can be used to equip the devices with digital inputs and outputs for status acquisition and for actuating the switching devices. 10/4 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering Protective devices and multifunction measuring instrument System protection using the protective device and the measurement process using a multifunction measuring instrument are independent from the device viewpoint. Multifunction measuring instruments may or may not be equipped with a display. Devices with a display are normally installed in a 96 mm x 96 mm sized cut-out in the switchgear cabinet door; multifunction measuring instruments without display are installed on the mounting rail. The phase currents are measured using current trans- formers connected next to the fused supply voltage on the measuring instrument. The data is made available using a plug-in communication connection. Other characteristics: Can also be installed with small wiring expense in existing systems Highest data efficiency and highest accuracy for multifunction measuring instruments Circuit-breaker with motor protection and control unit (SIMOCODE) The system motor protection using the protective device and the meas- urement by a motor protection and control unit (SIMOCODE) are independent from a device viewpoint, and are usually installed in the switchgear cabinet. To measure the phase currents and voltages, the current/voltage acquisition modules that belong to the SIMOCODE system must be installed and wired. Other characteristics: No additional wiring expense for status monitoring and control High data efficiency and accuracy Meter for billing Besides switching and protective devices without communications Requirement Single-pole diagram SENTRON 3 WL mit COM 15 Multifunction measuring instrument SIMOCODE PRO U1,2,3 I 1,2,3 cos P U1,2,3 I 1,2,3 cos U1,2,3 I 1,2,3 cos U1,2,3 I 1,2,3 cos U1,2,3 I 1,2,3 cos U1,2,3 I 1,2,3 cos U1,2,3 I 1,2,3 cos P P P P P P U 1,2,3 I 1,2,3 cos P Requirement SENTRON 3 VL mit COM 10 Current measurement (converter) SIMOCODE PRO Requirement Counter (converter) I 1,2,3 W Fig. 10.1/2: Various possible solutions of the planning tasks 10/5 10 capability, an electricity meter can be equipped with a drum-type register or a display for the acquisition of the power consumption. In many cases, meters approved by the Physikalisch Technische Bundesanstalt (PTB) are required for the invoice preparation. This approval is granted only for a limited time. After this time has expired, the meter must be approved again; this requires the removal of the meter. Other than the power value, most electricity meters do not provide any additional data. Power consumption can be read on the display / drum-type register (manually). To minimize reading errors, an automatic consumption quantity transfer can be made using a pulse interface and a distributed peripheral device, or transfer data can be read at an input of a multifunction measuring instrument or using bus systems. Other characteristics – data acquisition with calibrated measuring instruments to supply billing information (approval status monitoring!) – high accuracy of the power consumption metering SIMATIC powercontrol is characterized by Planning assurance – modular expandable system, innovative, always state-of-the-art in accordance with current standards and legal regulations – minimized interface risk with a coordinated portfolio of A&D hardware and software products as part of TIA and TIP – high solution quality thanks to the standardization and use of standards (e.g. standard hardware, such as SIMATIC S7 and Industrial Ethernet) Optimum implementation – energy management software for the simple integration of a complete system consisting of typical hardware components of the lowvoltage power distribution range – complete program of energy management functions in the full, expanded version – simple parameterization (no programming) and commissioning Cost reduction during operation – optimization of the operating costs by the transparency of the energy flows from the supply to the consumption – evaluation using energy-related parameters based on the consumption and costs – increased efficiency (saving effect 5–20% depending on the current situation) of the energy supply thanks to exact knowledge of the demand profile Further information: SIMATIC powercontrol at www.siemens.de/simatic-powercontrol For products of the SIMATIC family at www.siemens.de/simatic For the power management with SIMATIC powercontrol see “Totally Integrated Power Application Manual – Establishment of Basic Data and Preliminary Planning”, 2006, Chapter 6, page 6/4 ff. For the order numbers of the components and software packages described here, consult the current catalogs or contact your branch office representative. 10/6 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering 10.2 Building Management System The instabus KNX/EIB building management system favorably combines simple installation, clear system structure, modularity and flexibility. A continually increasing product range for lighting, sun protection, heating, ventilation, refrigeration, safety and energy management from all wellknown electrical installation suppliers has contributed to the success of building management systems since their market introduction in 1991. Critical for the success was the manufacturer-independent, standardized open system engineering with the standards EN 50090 (in Europe), ANSI EIA 776-5 (in USA) and ISO / IEC 14543-3 (international). Cost reduction through the use of structured room automation The standardized building management system forms the basis for the costoptimized operation of energy efficient buildings as demanded by far-sighted investors to ensure a value increase of their property. Compared with conven- tional electrical installation engineering, the instabus KNX/EIB building management system is characterized by cost reductions in both the investment phase and in the operating phase of a building. In the investment phase, the distributed system configuration of the building management system allows the reduction of power cabling compared with solutions using conventional electrical installation engineering. In the operating phase, the simple reconfiguring options simplify the adaptation to changed space utilization. When the overall costs are considered, the operating costs are ten times the investment costs over the lifetime of a building. Factor 10 8 6 4 2 100% 0 10 20 30 40 50 Years The complete operation is more than ten times more expensive than the manufacturing costs 0% Erection costs Operating/reconstruction costs Fig. 10.2/1: Comparison of the erection costs to the operating costs 10/7 10 Costs Building substation control systems / conventional 1.3 Only local switching compensated here by saving in the building structure. Note concerning the fire load: The amount of saving results from the comparison between the installation with conventional technology and using a building management system. This depends on the specific project and the associated extent of automation. In Fig. 10.2/2, the use of a building management system reduced the conventional wiring share from 60% (PVC) to 30% (PVC). The reduction of wiring also means less space is required for cable ducts and vaults. This helps to attain the goal of optimizing the usable space with regard to the complete volume of a building. To permit the consistent distribution of the building management system, control units are available for installation in flush-mounted boxes. If a conventional solution is used, more automation functions mean more wiring. This is particularly true when two or more installation systems are combined to produce an integrated room automation. The placement of actuators in floor-level distribution boards results in long cable lengths. A construction with a distribution cable that supplies the electrical energy from the floor-level distribution boards to room distribution boards (in office buildings: installation in the corridor above the suspended ceiling) already brings significant savings for the cable lengths. The exact saving potential depends on the building geometry and the specific project. A busbar trunking system, from which flexible branches can be made to room distribution boards, can be used instead of one or more distribution cables. 1 0.95 + Central switching 0.90 + Time control + Dimming + Constant-light control 0.85 + Shutter control + Scene control 0.75 + Single room control + Room divider control Functionality Fig. 10.2/2: Investment cost savings 10.2.1 Cost Reduction in the Investment Phase The instabus KNX/EIB building management system is a fully distributed bus system. Each individual bus device has a microprocessor that controls the communication with other bus devices and the function of the bus device. This modularity of the building management system forms the basis for providing a system availability comparable with that of a conventional electrical installation. Compared with solutions using conventional electrical installation engineering, the distributed system configuration provides the building management system with the possibility to reduce the power cabling. This reduces both the installation costs and also the fire load. Because the fire load affects not only the required fire protection measures but also the ceiling thicknesses (concrete masses) of a building, the reduction of the fire load is interesting when the overall construction costs are considered by the architects and the planners. When integrated building planning is made, a significant part of the investment costs in the building management system can be 120 % 100 80 60 40 20 0 115 100 90 60 75 30 37,5 97,5 40 40 60 60 PVC halogenfree PVC halogenfree Conventional Cabling instabus EIB Equipment Fig. 10.2/3: Proportion of cost incurred by cabling and equipment 10/8 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering 10.2.2 Cost Reduction During the Operating Phase The modular system structure of the instabus KNX/EIB building management system permits the implementation of a modular electrical installation that can be easily adapted to the changed room utilization by reconfiguring. This means time and cost savings already in the construction phase. Once the building is in operation, room utilization can be changed quickly and at low cost. The instabus KNX/EIB building management system avoids the need for large-scale changes of the electrical installation in the case of new tenants or organizational changes, adaptation of room sizes or room equipment. Costly periods of nonoccupation because of extensive reconstruction measures are reduced significantly. On average, departments in office buildings move to other rooms every three years. Compared with conventional electrical installations, the additional costs for the building system engineering pay for themselves in just three years merely by the faster adaptation to the changed room utilization. Note concerning the reduced costs for changes in the room utilization: Let us assume that in an office building the ceiling lighting is switched together along axes. If walls are moved, for conventional engineering, the cable from the switch (assuming just one!) to the added lights must be relaid and the cable to the removed lights cut. In the most favorable case, this can be done using wiring blocks. With a building management system, wiring blocks are not needed and the new assignment to the rooms is made by recon- figuring the actuators and the associated pushbuttons. The time for this change is just a few minutes rather than one or more hours. This, however, assumes an appropriate planning of the electrical installation designed for flexibility and modularity. Constant light control example A constant light control can keep the illumination intensity at a predefined level or at a level set by the user. This utilizes the daylight while reducing the energy costs. To combine the utilization of daylight with sun protection, the louvers of the shutters are regulated so that they allow daylight into the room and block the direct daylight depending on the sun radiation angle. Shielding from direct sunlight reduces the heating of the room and thus the costs for the climatic control of the room. Presence detector example In combination with presence detectors, the room functions can easily be changed automatically from comfort operation to standby or energysaving operation. This can also be provided in combination with an access control or with time control or be controlled manually. Outside the main utilization times, the illumination in corridors can be switched off when nobody is present. Within the main utilization times, the lighting level is reduced to a set minimum level when persons are present. This achieves an optimum energy saving coupled with a longer lifetime of the lights. Window contact example While a window is open, the room temperature control can automatically enter protective operation mode so that the control system becomes Costs instabus KNX/EIB / conventional 1 Cost saving by reparameterization rather than reinstalling for change of use Only local switching 0.9 0.85 + Central switching + Time control + Dimming + Constant-light control Minimization of the energy cost 0.75 0.70 + Shutter control + Scene control 0.60 + Single room control + Room divider control Functionality Fig. 10.2/4: Operating cost reduction through the use of instabus KNX/EIB 10/9 10 active again only for undershooting a frost-protection temperature or overshooting a heat-protection temperature. At night, a central command can be used to switch the temperature control automatically to energy-saving operation. These measures allow the energy amount used for illumination and for room temperature control to be reduced over the complete operational time to half that for conventional systems! and the N165 converter counter are two alternatives for the acquisition of the active energy consumption. Power supply contracts can require that a maximum amount of power is not exceeded within a certain time interval (typically: 15 minutes). The observance of the power consumption limits is ensured using the maximumdemand monitor that uses predefined rules to automatically remove or add loads. This can significantly lower the energy costs, even for smaller buildings. Note The N360 maximum-demand monitor can be used to monitor maximum power loads up to 1 MW. Photo 10.2/1: Operating cycles counter N 343 10.2.3 Energy Costs and Optimization of the Maintenance In addition to satisfying the comfort needs of the room occupants, i.e. the occupants' satisfaction, the correct assignment of operating costs and the optimization of maintenance costs are decisive for a building operator for the profitable operation of a property. The electricity meters or operating hours counters provided for acquiring the operating costs related to the associated department or tenant can be read regularly over the bus. This allows the operating costs to be transferred monthly, daily or in any other time intervals to a billing department where they can be processed for billing. To optimize maintenance, the operating hours or operating cycles of an item of equipment (e.g. motor, pump, lamp) can be recorded, and when a predefined threshold is exceeded (e.g. 10,000 hours light duration), automatically converted into a maintenance request (requirement-controlled maintenance). Note: The N343 operating hours and operating cycles counter is used to acquire the operating hours. The N162 counter (direct connection up to 63 A) 10.2.4 Safety The protection of persons and assets plays an important role in the building installation. The building management system can effectively help to prevent, or at least limit, damage. Before a storm can damage shutters and cause parts to fly through the air as dangerous projectiles, the shutters will be automatically placed in a safe position. If the corridor lighting operates presence-dependent, it always provides the correct amount of light when required. On the other hand, no more energy than required is consumed. The same is true for exterior and path lighting activated depending on the darkness, movement and time, and always switched on when required. Damage caused by unsupervised electrical devices (copiers, printers) can be prevented by switching them off centrally at night. The same window contact used to switch the room temperature operat- Photo 10.2/2: Counter N 162 ing mode to energy-saving operation can also be used to report “window open” or “door open”. This can be used to prevent the possibly major damage caused by frost, storm or rain. An interface of the fire detection system for the building management system can be used to switch off specific electrical consumers before they become an additional danger. At 10/10 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering the same time, the complete lighting can be switched on to reduce the danger of panic. In case of danger, persons in the building can be safely led outside using an emergency and escape path lighting in accordance with EN 1838. Note: The regulations for safety lighting must be observed. 10.2.6 Interfaces instabus KNX/EIB provides a wide selection of interfaces to other systems. These include interfaces to an analog telephone, GSM, ISDN, DALI, PROFIBUS DP, PROFINET, BACnet, OPC and Internet Protocol (IP). DALI (Digital Addressable Lighting Interface) DALI is an interface definition for electronic control gear (ECG) for illumination control. DALI permits the control of up to 64 devices using a control unit. Only control units such as the GE141 EIB/DALI interface or the N141 KNX/DALI interface make full use of the possibilities that DALI offers. The combination of DALI and building management system permits the implementation of solutions that previously were not possible, or only at considerable cost. For example, the communication possibilities provided by DALI allow the failure of a single lamp or a single ECG, the switching status and a current dimming value to be reported. This makes the operational state of each lamp group and, indeed, each lamp to always be available to the building management system. This data can be shown on a display or with little effort forwarded to a higher-level building management system. The DALI standard allows the assignment of DALI devices to as many as 16 scenarios. The specific settings for each scenario are stored in the individual DALI devices and can be initiated with a single command. This allows even complex scenarios or very fast command sequences to be initiated by the building management system. Photo 10.2/5: KNX/DALI interface N 141 10.2.5 Other Applications Conference and meeting rooms require many functions: Switching and dimming lights Raising and lowering shutters Raising and lowering the projection screen Switching the projector/beamer on and off Switching loudspeakers on and off For different situations (e.g. lecture, discussion, presentation), these various functions must be brought into a certain state. For example, for a lecture, the main lighting should be switched off or dimmed, the projector should be switched on, the projection screen lowered and the shutters closed. This scenario can be initiated by pressing a single button. A pushbutton, a touch panel or a PC can be used as input device. Just as easily, when the room is left, pressing a button initiates an "everything off" scenario so that no devices remain switched on unnecessarily. In the same manner as scenarios can be initiated by pressing a button, an event such as the overshooting of a temperature threshold or a brightness value can initiate a single scene or a complete execution sequence. Photo 10.2/3: Maximum-demand monitor N 360 Photo 10.2/4: EIB/DALI interface GE 141 The N141 KNX/DALI interface also provides the possibility of effect control, for example, for a running light or color changes. This allows the combination of KNX/EIB and building management system with DALI to achieve system capabilities comparable with those for DMX. 10/11 10 EIBnet/IP The complete linking of local and worldwide networks has also opened new possibilities for building management systems. Even properties spread throughout the world can be monitored and controlled centrally at low cost 24-hours a day from any location. In particular, this is also true in conjunction with the EIBnet/IP defined as standard in EN 13321-2. EIBnet/IP extends the building management system in a system-conforming manner and easily through the use of existing local and worldwide data networks. Using existing networks for communication reduces the costs for the creation, operation and maintenance of the building management system for commercial buildings and real estates at differerent locations. Control commands and data can be exchanged with building management systems much faster and in larger volume. This large volume not only permits a central monitoring and greatly extends the operational possibilities, but also significantly reduces operating costs. EIBnet/IP is an open standard for the remote configuration, the remote operation and the fast communication between KNX/EIB lines and installations. The standard describes mainly two different communication possibilities: tunneling and routing. Routing allows a KNX/EIB protocol from an EIBnet/IP router to be forwarded to several different routers. This is the basis for the fast communication between lines, backbones or complete installations. A device such as the IP router N146, which implements EIBnet/IP routing, so corresponds functionally to a line or backbone coupler. In contrast, tunneling permits the point-to-point communication with EIBnet/IP devices. This replaces not only the communication using a serial interface, but, in addition to the higher speed, allows location independency. Any point in the IP network can access the KNX/EIB installation. With little effort, any status from the building management system can be transferred directly to a higher-level building management system. In buildings or split estates with very high standardization of the building management system, the same solution is often used at all building levels or properties. This unavoidably leads to an identical configuration in the individual units. However, these installations should still be managed centrally and operated remotely. The EIBnet/IP standard provides a userfriendly name that can be individually assigned to EIBnet/IP devices, such as the IP interface N148/21, the IP router N146 or the IP controller N350E. This device name is then used to identify and distinguish the building levels or properties. In conjunction with the ComBridge Studio visualization software written by IPAS GmbH based on the new EIBnet/IP standard, these properties and subsystems are operated centrally with a single application. The manufacturer-independent ETS3 configuration software can be used to configure these systems using a network connection. Photo 10.2/6: IP router N 146 requirements of the room occupants: room temperature and lighting brightness are set optimally for the associated use situation. However, the room occupants must always have the possibility to individually change their work environment. Generally, the lighting brightness and the room temperature are not directly coupled with each other. Artificial or natural lighting, however, also causes a rise in the temperature of the rooms, which, depending on the time of the year, is either desirable or undesirable. Sun protection systems affect the room temperature and brightness. Since conventional solutions for the control of the lighting, sun protection and heating-ventilation-refrigeration are each limited to a single type of installation, mutual dependencies between the different installations cannot be taken into account. Only the use of a building management system permits an integration of the control of different 10.2.7 Cost Reduction using Structured Room Automation Increased demands placed on the energy efficiency of buildings require an optimization of the energy provision, distribution and use. This goal can only be achieved with automation. The instabus KNX/EIB building management system can be used to sensibly automate both the power distribution and the power consumption at an acceptable cost. Sensible automation considers the comfort 10/12 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering installations in the room at acceptable cost. The goal is the reduction of not only the planning time and cost, but also the construction and operating costs. Planning with room modules is the method of choice. Here, a room module is considered to be the smallest room unit (e.g. axis) and thus the smallest planning unit. Each room module has room functions (Fig. 10.2/1). Only a matched automation of these room functions can optimize the power consumption, whereas the modularization minimizes the construction costs and keeps the maintenance costs low. The room module is planned so that it contains all required functions. The following points must be considered: Use of daylight with anti-glare / sun protection control Constant light regulation in conjunction with the use of daylight Lighting control (dimming) using the DALI interface Temperature regulation in conjunction with sun protection control Occupancy-dependent control of the room operating mode (comfort, standby, night, protective operation) Operating elements for the user – Wall-mounted pushbuttons – Telephone interface – Browser interface (PC as operating station) – Interface to the building management system Such a planned room module is then duplicated in accordance with the building geometry. The EIBnet/IP technology permits an unrestricted duplication of the room modules or the several combination of room modules. EIBnet/IP also permits a very efficient interface to building management systems. Light Lighting control Anti-glare control Daylight control Sun protection control Occupancy control and control of the room operating mode Room access control Operation and display Minimization of the energy cost Temperature Sun protection control Heating Cooling Ventilation Temperature and climatic control Fig. 10.2/5: Room functions in the commercial buildings Planning documents Planning and tender documents are available at www.din-bauportal.de/siemens Training A comprehensive training program for KNX/EIB is available at www.siemens.de/sitrain-et Literature The principles and the system properties of the KNX/EIB building management system are discussed in detail in the “Handbuch EIB Haus- und Gebäudesystemtechnik, KNX/EIBGrundlagen” published by ZVEI and ZVEH in German. The “Handbuch EIB Gebäudesystemtechnik, Anwendungen” published by ZVEI and ZVEH contains examples for the control of lighting, sun protection and heating-ventilation-refrigeration, for load management and for the monitoring, display, reporting and operating of facilities. Siemens offers modular training courses for building management systems as training for the use of Siemens devices in these application areas. 10/13 10 10.3 Energy Automation for the Industry The task of energy automation is to provide electricity reliably in a form appropriate for the requirement. Energy automation covers Network management for the overall control of the energy demand Substation automation for a costeffective control of operations Remote control for a secure and user-friendly remote access to the process This task is not limited to pure power utilities. After all, every industry is dependent on the guaranteed availability of electricity at the lowest possible cost, irrespective whether in Total solutions the mining industry, the processing industry, transport companies, healthcare, etc. Although the general demand for solutions may be universal, the individual solution must be industry- and company-specific. Competition leads to an increased cost pressure that requires rationalization measures, also for the electricity supply. This can be, for example, result in restrictions imposed on shift work for network monitoring at night or at the weekend. The energy market, which is now subject to increased dynamics and complexity because of the market liberalization, also affects power supply in the industrial sector. Acquisition, monitoring and control of the energy purchases and the peak load can reduce costs and optimize in-plant power generation. Energy automation means High quality and availability of the power supply Optimum use of all resources with minimized network losses Increased safety from blackouts and damage by system protection Increased efficiency through the minimization of downtimes as the result of fast fault detection and clarification Improved profitability because of reduced operating and maintenance costs Reduction of energy costs as the result of consumption optimization High security of investment as a result of detailed knowledge of the associated state and behavior of the power supply Expandable solutions thanks to increased flexibility, scalability and the use of standardized components So that you… Control center Spectrum PowerCC … keep an eye on everything Station automation and remote control technology SICAM PAS ACP 1703 … protect plant operation Field level SIPROTEC SIMEAS … secure your investment Communication level IEC 61850, PROFIBUS, Modbus, OPC, DNP IEC 60870-5-101, -103, -104 Fig. 10.3/1: Energy automation at a glance … maintain the connection 10/14 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering 10.3.1 Spectrum PowerCC Network Control System Spectrum PowerCC is the comprehensive and expandable system solution for the economical and reliable operating control of power supply systems. The Windows-based control system was developed using international standards and de-facto standards. With a comprehensive range of different application possibilities, the control system increases the efficiency of power system operation and adapts itself to these specific requirements. The control system can be integrated in existing IT environments and also provides significant savings not only for system administration and data updating costs, but also for engineering. Spectrum PowerCC is Web-based and can easily be connected to the Internet. Advantages of Spectrum PowerCC at a glance Targeted and step by step investment Open and standardized interfaces with modular architecture ensures an optimum integration capability and the expandability of the system solutions Use of the latest standards (CIM data model; IEC 61970) and industrial de-facto standards (OPC Object Linking and Embedding for Process Control) for connection to the automation world, Microsoft Office or SIMATIC WinCC for operator control and monitoring; this provides access to office communication systems and the world of industrial automation Fig. 10.3/2: Spectrum PowerCC user interface Mobile access to all data with Web access and Internet connection: This allows, for example, remote system administration, faster resupply and an active participation on energy trading The innovation of the individual solution components increases the lifetime of plants and the return on investment Application and functional scope The Spectrum PowerCC functions are tailored to the requirements of industrial power supply both as a simple computer system (all-in-one solution) and a redundant multi-server version. Basic functions The basic SCADA functions contain, among other things, operator control and monitoring, logging, control, adjustment, flagging and issuing of alarms. This scope of performance is complemented by alarm forwarding, e.g. via “Cityruf” (city call), the operating and display possibility using intranet/Internet, messages and values created using linking rules, and automatic command outputs. 10/15 10 User interface The uniformity of the appearance and the operating philosophy of Spectrum PowerCC are supported by a Webcapable user interface whose layout, use of colors, operator prompting, acoustic signals, etc., are identical for all applications. Users familiar with Microsoft Windows will find many of the standardized Windows elements in the user interface. Spectrum PowerCC provides clear and understandable displays, the visualization of values – also graphically as bar charts, curves, filling levels, etc. – the logging of messages, powerful filter functions for signaling lists and the display of information outside the power supply, e.g. from the production plant. The operator receives alarms as optical and/or acoustic indicators. Graphical representation of the fault cause can be selected directly from the message list; messages can be classified according to their importance. Operating support The operating support is used to determine the fault location, topological coloring, locking conditions, determination of the fault location in the supply network, display of network sections with ground fault as the result of messages of suitable protection equipment, localization of faulty resources and the highlighting of network sections without power. Archive With their data, archives are a pool of experience gained from network operation. They are the backbone of online operations control, in particular, concerning higher-level optimization and decision functions, the wording of contracts for energy purchase, as well as further operational requirements placed on archive data (data mining). Load management Load management of power systems by Spectrum PowerCC permits the Spectrum Power PC IEC 60870-5-101/104 or DNP V3.00 Remote SICAM PAS CC operation SICAM PAS Ethernet PROFIBUS FMS IEC 60870-5-103 IEC 60870-5-104 IEC 60870-5-101 IEC 61850 Modbus/PROFIBUS DP … SIPROTEC protection / combi-protection Small remote operating unit TM 1703 mic SIPROTEC protection / combiprotection … Measurement, SIMEAS power quality Distributed remote operation BC 1703 ACP Fig. 10.3/3: Example of an energy automation concept with communication connections to the field level and the control center 10/16 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering optimum use of power purchasing contracts taking account of the loads or in-plant generating possibilities that can be connected or disconnected from supply on the basis of kWh rate periods. The load management prevents the exceeding of contractually agreed purchase limit values taking account of the operational load and power generating limitations, such as the minimum/ maximum operating time, availability, downtime, etc. The load management system can be expanded with dedicated load forecasts (hours or days) and resource planning (matching of the demand and the generating capability). The load management system also provides an interface to ripple control systems. Process data acquisition and interfaces The PROFIBUS, IEC 60 870 5-101, -102, -104 and SINAUT 8-FW standard protocols simplify the process connection. The OPC interface permits the simple and efficient connection of industrial communications standards such as Industrial Ethernet. Interfaces based on ODBC/OLE simplify the integration of tools such as Microsoft Excel. An SQL interface is provided for archive information. A simplified SQL interface permits data access directly from the domain model (e.g. plant data, process data or data calculated in applications). Communication via Internet and intranet The control system is often part of an internal and external computer network. Spectrum PowerCC permits access to the system using the Internet, for example, to give on-call or mobile personnel operating capability at night. Wide-band intranet access from office workplaces or using an extranet, also from remote workplaces, is also possible. The Internet communication is protected against unauthorized access using the appropriate security concepts. 10.3.2 Energy Automation with SICAM PAS SICAM PAS (Power Automation System) is the comprehensive solution for distributed automation in switchgear, independent of whether power distribution is for a large industrial plant, a large consumer, or a facility, such as an airport. Energy automation – consistent and open Through the use of the IEC 61850, the SICAM PAS substation control device provides for expandable interoperable plant construction. For example, SICAM PAS is suitable for the inclusion of field devices of all manufacturers applying IEC 61850. The concept and parameterization of SICAM PAS supports the direct data exchange at the field level. This means no bottlenecks in communication, for example. The fastest Ethernet connections and a “Station Unit” optimized for data transmission and processing make SICAM PAS a pioneering energy automation system. Network capability and open data interfaces such as OPC permit a simple transfer of information to the office and industrial world. This facitilitates analyses, or just the display of energy data, as often needed for the manager responsible for production. Simple integration PROFIBUS FMS, PROFIBUS DP or IEC 60870-5-103 allow existing plants at the low-voltage level or in the industrial process automation to be inte- grated in a concept with IEC 61850. IEC 60870-5-101 and 104 are provided for the remote communication. The cooperation on the STA (Seamless Telecommunication Architecture) standardization project with the goal of providing a consistent use of IEC 61850 down to the control center level ensures the integration capability of SICAM PAS. Central control and monitoring All plant sections, starting with the system supply and ending with the low-voltage distribution, can be centrally monitored and controlled from SICAM PAS CC (Control Center). This and a fast response provided by the clear representation of the operating situation permit a cost-optimized operation and a fast supply resumption, should malfunctions occur in the power system. SIMATIC WinCC as basis of the operation ensures the compatibility with the automation of other industrial processes and reduces training times to a minimum. Fast standard configurations The SICAM PAS UI intelligent parameterization system is designed so that its operation conforms to DIGSI and takes configuration data directly from the field level. An XML data transfer is provided for IEC 61850 and the SIPROTEC 4 field devices. The standard configurations provided in a library for other field devices can be easily integrated as types. This prevents duplicate inputs or input errors. 10/17 10 10.3.3 Remote Control, Communicating and Automating with ACP 1703 There is the increasing demand to locally acquire physically separated information and to reliably transfer this information to where the data is needed for monitoring and analysis. Just a few optical fiber cables rather than many parallel signal cables reduce the cost for installation and maintenance, and also ensure high reliability and interference immunity. The ACP 1703 system family can be used here. High functionality and flexibility are the basis for a modern remote control system. This also includes comprehensive possibilities for communication, automation and the integration of process signals. The various ACP 1703 components offer optimum scalability depending on the number of interfaces and process variables. All are based on the same system architecture, use the same technology and can be edited with the same tool, Toolbox II. In industrial processes in particular, the boundary between remote control and distributed control engineering often cannot be defined unambigu- ously. The secondary technology must also flexibly solve the required tasks where they are needed. ACP 1703 and SICAM PAS together cover the full scope of possible tasks, and provide solutions for every requirement, featuring high performance as well as profitability. ACP 1703 consists of the following components AK 1703 ACP is the large automation component for a flexible mix of communications, automation and peripherals. A scalable number of serial and Ethernet interfaces, redundancy concepts and high signal density for local inputs/outputs characterize these components AK 1703 ACP can be used as a central unit or as a remote control substation, data node or front-end, automation unit with stand-alone function groups, and with local or remote peripherals. TM 1703 ACP is the solution for compact applications. This component provides up to five communication interfaces, an automation function and peripheral connection using the distributed TM terminal modules. The mechanical construction is based on intelligent terminal modules for simple installation on 35-mm mounting rails. TM 1703 ACP permits the direct interface connection of actua- tors and sensors with wire cross sections up to 2.5 mm2. Modules for binary input/output up to 220 V DC also open up savings potential at the coupling level. For the distributed input/output, individual modules can be installed at distances up to 200 m from the control panel. BC 1703 ACP is the robust component for highest EMC compatibility and direct peripheral interface connection up to 220 V DC. High switching capacity and direct measuring transducer inputs permit operation under harsh conditions. Up to three communications interfaces and integrated automation function ensure the flexible use in central and distributed configurations. The BC 1703 ACP can also be expanded with TM terminal modules. TM 1703 mic, as small remote control unit, assumes a special place. Optionally equipped with a serial or Ethernet interface, it can use up to eight TM terminal modules. IEC 60870-5-101 (serial) or IEC 60870-5-104 (using TCP/IP) is available as protocol. The included automation function can be used for simple tasks. The integrated Web server supports the simple configuring using a standard Web browser. The unit is installed easily on mounting rails. Photo 10.3/1: ACP 1703 Photo 10.3/2: TM 1703 ACP Photo 10.3/3: BC 1703 ACP 10/18 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering Common properties All components of the ACP family are based on the same system architecture and, despite their different constructions, use the same technology. As they also feature the same functions, they can be combined with each other as required and can be used and both from a technical and economic viewpoint, they can be used optimally according to requirements. For example, since all components rely on the same communication modules (other than TM 1703 mic), they can use the available protocols. Not only the standard protocols, such as IEC 60870-5-101/103/104 and IEC 61850 are available, but also common standards such as DNP 3.0 or Modbus, together with many proprietary protocols provided for interfacing existing third-party equipment. What is also common to all components is the integrated flash memory card for the reliable storage of all parameters and the specific firmware. This supports a problem-free replacement of a component, simply by exchanging the memory card. The memory card can also be written offline with the Toolbox II and then added to the system. An integrated tool Toolbox II provides all functions required for integrated and consistent engineering of the complete plant, such as data collection, data modeling, configuring and parameterization. Furthermore, it supports the engineering of the process information for the automation and maintenance control systems, including the creation of automation tasks using a graphical function chart in accordance with IEC 61131-3. Even the management of the systems from third-party manufacturers using their specific parameters is possible with Toolbox II. The data modeling is constructed object-oriented and thus simplifies data clarity and consistency, even after several changes/extensions have been made. Toolbox II runs with all ACP 1703 subsystems and supports all subprocesses of a remote control and automation project. Data exchange with DIGSI and SICAM PAS UI ensures that even mixed configurations do not require the same data to be entered more than once. Remote control is more ACP 1703 always provides adequate performance. The modular multiprocessor concept allows the processor power to grow with each system expansion. The distributed architecture and the principle of evolutionary development ensure a durable system with a long service life. This secures investment in the long run. High functional reliability is a matter of course for the ACP 1703; its integrated comprehensive self-monitoring function detects any problem immediately, and informs the operational management and service without delay. Photo 10.3/4: TM 1703 mic Further information: Spectrum PowerCC: www.siemens.com/powerCC SICAM PAS: www.siemens.com/sicam ACP 1703: www.siemens.com/sicam 10/19 10 10.4 Safety Lighting Systems The globalization and harmonization process makes the international standards and regulations landscape not only ever more complicated, but also subjects it to continuous change. Solutions considered to be fully legitimate yesterday have been completely rejected today and can no longer be applied. New requirements are added and, not infrequently, complicate the planning and project implementativ. To address this situation and to avoid the need to continually catch up with the latest development, the interested observer has just one possibility. The observer must become familiar with the original concepts of safety lighting. In other words, determine the protection goal and prepare its implementation for each specific application situation. We must finally waive goodbye to an ever-recurring myth: there is no one piece of paper on which everything is written describing how to proceed. The aim of safety engineering is to ensure that nothing happens when something happens. This is the only measure for the work of the safety specialists. Introduction Safety lighting began its tender start in the early days of industrialization when the founding fathers of today's corporate groups began to fetch many labourers into their factories and employ them in large production halls without adequate daylight. When power failures occurred, the employees were sometimes still standing next to running machines and suddenly left without any lighting. This resulted in many severe accidents which gave rise to the call for safety lighting. Every employer was required to make provisions for his employees to be led safely to the factory doors in case of malfunctions. The safety lighting successively entered other areas where persons gathered and nowadays it is inconceivable that it is not needed in many application areas. Wherever people come together, a power failure brings major dangers. Rated operational duration (in hours) of the power source for safety purposes Illuminated or back-lit safety signs in continuous operation A safety lighting system built in accordance with statutory regulations, properly maintained and functioning, permits at least a safe exit from the building. A safety lighting system consists of the safety power source, distribution, monitoring units, cable systems, lights and rescue signs. To implement such Power generating set with medium interruption (≤ 15 seconds) Central power supply system – CPS Gathering places, theaters, cinemas Exhibition buildings Shops Restaurants Hotels, guesthouses, senior citizen's homes Schools Parking buildings, underground garages Airports, railroad stations High-rise buildings Rescue routes in places of work Workplaces subject to particular danger Stages 1) 2) 2) 2) 2) 2) 2) 2) 1 1 1 1 1 1) 1 1) 15 1 1 1) 15 0.5 1 3 3 3 3 8 5) 3 1 3 6) 3 4) 1 3) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Single-battery system Max. switchover time (s) Examples for building regulations in force for buildings in which people gather Illuminance ([lx) – – – • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • – – – – • • • – • • – – 2) 2) 2) 2) 3 3 Depending on the panic risk, from 1 second to 15 seconds 2) Illuminance intensity of the safety lighting in accordance with DIN EN 1838 3) The time for which persons are subject to danger 4) For high-rise residential buildings, 8 hours, unless the switching operation satisfies the requirements of Section 4.7.6 5) Three hours are sufficient when the switching operation satisfies the requirements of Section 4.7.6 6) For above-ground areas of railroad stations, one hour is also permitted provided an appropriate evacuation concept exists • permitted – not relevant Table 10.4/1: Requirements placed on the electrical system for safety lighting systems (source: E DIN VDE 0108-100: 2005-1 0) 10/20 Totally Integrated Power by Siemens Specially-protected power supply system Power generating set with short interruption (≤ 0.5 seconds) Power generating set without interruption (0 seconds) Power supply system with power limit – LPS – – – – – – – – – • • – Ease of Operation, Safety and Control Engineering a system, a number of buildingspecific aspects must be considered during the planning and implementation. The continually increasing share of electronic components in our buildings means the fault scenarios to be considered become ever more comprehensive. The basic task of a safety lighting in any fault situation is to ensure adequate lighting being switched on in good time. This requires that in case of failure, the route of the power supply, from the feeding point to the actually installed general lighting, must be substituted with safety lighting. The nearer the emergency power source is to the site of application, the less expense is required for the cabling. If bus systems are used to operate the general lighting, they must also be monitored. The possibility that some circumstance causes both systems to fail at the same time must also be excluded. This could, for example, be caused by a fire or excavation work at cable channels. After reading the documents, enter the individual fire areas in the floor plans and draw the escape and rescue paths. Some state building regulations require that fire areas larger than 1,600 m2 be subdivided into so-called electrical fire areas. Characteristics Operating voltage range DC: Switching time: from AC to DC from DC to AC CEAG data 186 V - 275 V at -10 °C System switching time: 180 ms – 450 ms 180 ms – 450 ms The fundamental decision should now be made whether the architect's general lighting is to be used for the safety lighting, or whether separate safety lighting supplied by a system manufacturer is to be used. This question is decisive for Explanation Possible battery voltage range in backup operation Typical CEAG system switching time Electronic ballast for tubular fluorescent lamps supplied with alternating-current Special requirements placed on electronic ballast for fluorescent lamps supplied with alternatingcurrent EMC (electromagnetic conformance) standard EMC standard – electrical interference, in particular for emergency lighting lamps EMC standard – limit values and measuring procedures for radio interference to electrical lighting equipment Satisfied Satisfies the standard*: DIN EN 60929 Satisfies the standard*: DIN EN 61347-2-3 (incl. Appendix J) Satisfies the standard*: DIN EN 61000-3-2 Satisfies the standard*: DIN EN 61547 Satisfies the standard*: DIN EN 55015 (measurement for AC and DC) * The certification in accordance with VDE 0108 does not suffice because this is not any electronic ballast standard Characteristics CEAG data Setpoint for use of: 2L-CG-S: 250 A/ms Rated current in AC operation: Rated current in DC operation: Light flux ratio in DC operation 186 V comipared with 230 V Manufacturer-specific Manufacturer-specific Manufacturer-specific Applies to a maximum permitted switch-on current of the ballasts in circuit in order to handle the maximum contact load of the circuit switching operations. To determine the maximum number of ballasts per circuit dito In battery operation for emergency light ballasts for the light planning Lights planned for use as safety lights must conform to the DIN EN 60598-2-22 standards. Table 10.4/2: Requirements placed on third-party ECGs (request table with an e-mail to:
[email protected]) 10/21 10 the further planning for three reasons: Lamps for general lighting requires higher wattages with the consequence that fewer lights per circuit can be connected. More circuits (cabling and circuit modules) are required. The lights and their fittings must satisfy a number of standards. Table 10.4/2 summarizes the standards to be satisfied and the required parameters for ECGs in safety lighting . The required battery capacity will be much greater. Converted architect lights often have a “wild” interior. Important is that a light that serves as a safety light must now satisfy much stricter criteria. And the more additional engineering (monitoring module, separate ECGs for multilamp lights, DALI modules) installed on-site, the more difficult it is to satisfy these standards. In the worst case, the general lighting that was merely converted to safety lighting does not function in an emergency. All persons involved will have to carry the responsibility. A better solution is to have the manufacturer directly equip the desired lights with the required emergency light components. This retains the warranty and the CE marking is normally maintained. The number of lights is now determined individually for each fire area. To do this, enter the safety and rescue path lights required in accordance with EN 1838 in the floor plans and transfer them to the project chart (Photo 10.4/1). The circuits result from the fire areas and the associated lights. The correct system must now be chosen. If permitted by the building conditions, the equipping of fire area with low-power systems (LP system, previously called group battery systems) is a good choice. If this is not possible, the use of a central power system (CP system, previously called central bat- tery system) is recommended. The final circuit wiring from the LP and CP systems to the lights is made in accordance with the Sample Directive on Fireproofing Requirements for Line Systems (MLAR). The advantage of these systems lies in the relatively short cable lengths, and the energy required in an emergency is available from batteries very near the place of use. No complicated switchgear and cable networks for distributing the emergency power must be built and maintained (E30, E90). When the safety lighting needs to be activated, the safety light unit must receive a switch-on signal. The extent of the possible interference sources that need to be detected and avoided in an emergency must be considered. The procedure here is simple. The general distribution board is monitored with voltage sensors so that on occurrence of an incident, the complete general lighting of a complete Photo 10.4/1: Example of a project schedule (request project schedule as an Excel file with an e-mail to:
[email protected]) 10/22 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering area cannot fail undetected. This obviously also includes lighting control and any bus systems. Irrespective of whether the bus fails and the general power supply is still operational or, the other way round, the safety lighting must operate without delay in any fault situation. This obviously also applies to dimmed safety lights. Safety lighting with alternative power sources The installation of alternative power sources for the safety lighting is somewhat more difficult than for the LP and CP systems. The effort for the acquisition of a failure of the general lighting remains the same as for the LP and CP systems. The difficulty here lies in the often long, including lines between buildings transmission lines of the emergency power supply in the fact that power must be 100% provided in an emergency (take account of the protection requirements). The planner is responsible and must prove that safety lighting is available without delay when required, and not interrupted for the prescribed nominal operational duration. However, because every electrical system is built differently, this can develop into a demanding task. A possible approach could be mind-mapping: follow the path of the emergency supply from the point where the emergency power source feeds in to the final circuits of the safety lighting. Every place where emergency power supply could be hindered must be considered in advance and precautions must be taken to prevent such adverse effects. Such areas also include possible excavation work in the property, fire in distribution boards or on cabling sections, normal wear, usual power failures in the public grid etc. The inrush currents must not be underestimated, which, in an emergency, would load such alternative power sources, in particular, when all consumers are switched on at once. The smallest and the largest possible short-circuit current must be included in all calculations. Selectivity and absence of system perturbations must be proved with calculations and documented. In case of fire, possible heating of the E30/E90 power cables must be considered for calculating appropriate cable cross sections. Considerations are required when exactly the emergency power source should be connected into supply in an emergency and how the system recovery test could proceed. Whether this effort is worthwhile compared with LP systems and CP systems may be different from case to case. The step, however, must be considered carefully from the beginning, because a change from one system to another system is not always possible. Single battery lights Although single battery lights are easier to use, they are not economical when more than approximately 15 units are involved. The purchase price and the frequently-required battery replacement mean they do not really represent an alternative. The systems should have at least an automatic test log and a blocking function. There are many reasons for and against the use of single battery lights. Anyone who has already used this technology knows what problems are involved. Such a solution can be recommended only under very unusual circumstances. 10.4.2 Where Is a Safety Lighting System Required? E DIN VDE 0108-100: 2005-10; Section 4.1 “The safety lighting ensures that should the general power supply fail, the lighting is made available without delay, automatically and for a predefined time in a specified area”. The system must ensure that the safety lighting satisfies the following functions: a) Illumination of the rescue path signs b) Illumination of the exit ways so that the safe areas can be safely reached c) Adequate illumination of the fire fighting equipment or alarm equipment along the rescue paths d) It should permit work associated with safety measures. To ensure that the safety lighting system is configured to meet the applicable standards, prior to configuring the system, drawings must be provided that show the layout of the buildings and all existing or suggested rescue paths, fire-alarm call points and fire protection equipment, and indicate the position of all obstacles that could impair escape. The safety lighting must be active if only parts of the general lighting fail. Provisions must always be made to ensure that, should the general power supply fail, the safety lighting in the affected faulted area is activated. This can also mean that individual circuitbreakers, ground leakage circuitbreakers and control-circuit fuses for bus systems or light control systems are monitored. At least two circuits and two safety lights must be planned for every area equipped with safety lighting. 10/23 10 Controllers and bus systems of the electrical system for safety purposes must be independent of the controllers and bus systems of the building control systems. A coupling of both systems is permitted only with an interface that ensures a reliable, electrical isolation of both systems from each other. The extent of a safety lighting depends on the type and use of the building. Further notes are contained in Table 10.4/1. MLAR: 2005-11, Excerpt: 5 Functional Endurance of Electrical Cable Systems in Case of Fire 5.1 Basic Requirements 5.1.1 The electrical cable systems for safety technology systems and equipment prescribed by the building regulations must be constructed or separated by components in such a way that the safety systems and equipment remain functional (functional endurance) in case of fire for an adequate period of time. This functional endurance must be ensured for possible interactions with other systems, equipment or their parts. 5.1.2 Other safety systems and equipment required for operation may also be connected to the distribution boards for the electrical cable systems which were installed for safety systems and equipment prescribed by building regulations. In this case, it must be ensured that safety systems and equipment prescribed by the building authorities are not impaired in any way. 5.2 Functional Endurance 5.2.1 Functional endurance of the cables is ensured if the cables a) satisfy the test requirements specified in DIN 4102-12:1998-11 (functional endurance class E 30 to E90) or are laid b) on unfinished ceilings below the floor screed with a thickness of at least 30 mm or if c) they are buried in the ground. 5.2.2 Distribution boards for electrical cable systems with functional endurance in accordance with Section 5.3 must be a) located in dedicated rooms not used for other purposes that are separated from other rooms by walls, ceilings and doors with a fire resistance appropriate for the required duration of the func- tional endurance and, with the exception of the doors, with non-inflammable building materials, b) separated with a housing for which the operability of the electrical fittings in the distribution board is proved in case of fire for the required duration of functional endurance by a usability certification issued by the building authorities (note: the party performing the installation has the proof responsibility) or c) surrounded by components (including their terminations) that have a fire resistance appropriate for the required duration of the functional endurance and, with exception of the terminations, are made of non-inflammable building materials, whereby it must be ensured that the operability of the electrical fittings in the distribution board is proved in case of fire for the required duration of functional endurance. (This requires a certified system with building authorities approval number of at least Z 86.2) 5.3 Duration of the Functional Endurance 5.3.2 The duration of the functional endurance of the wiring systems must be at least 30 minutes for a) safety lighting systems; excluded are wiring systems used to supply power to the safety lighting only within a fire area at a floor level or only within a staircase; the floor area of each fire area must not exceed 1,600 m2, b) passenger elevators with control that allows use in case of fire; excluded are wiring systems located within the elevator shafts or the motor rooms laid with functional endurance E30. 10.4.3 MLAR – Sample Directive on Fireproofing Requirements for Line Systems Several high damage incidents in recent years made it clear that a power failure, etc., can also be the result of a fire. Consequently, MLAR guidelines must be considered during the setup of safety lighting systems. The functional safety of the whole system must always be considered when determining the system scope. 10/24 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering 10.4.4 Installation of a CP System Battery System For the installation of CP System battery systems a number of regulations and specifications apply, in particular MLAR: 2005-11, DIN EN 50272-2 and LBO. Depending on the building conditions, the previously mentioned regulations and specifications provide the following possibilities for placement: Main distribution board of the general power supply (MD-GPS) and main distribution board of the safety power supply (MD-SPS) in an electrical operating area. Ensure here that MD-GPS and MD-SPS are separated from each other with 30 minutes functional endurance (Fig. 10.4/1a). MD-SPS including battery in a separate electrical operating area. Ensure here that MD-GPS and MD-SPS are separated from each other with 90 minutes functional endurance (Fig. 10.4/1b). Fig. 10.4/1b: Placement of CP System battery systems, battery systems in the HV-SV Fig. 10.4/1a: Placement of CP System battery systems with substation expense. The requirements placed on fire protection in accordance with MLAR: 2005-11 remain effective. Circuitry types of the safety lighting Permanent light (DS) Safety lights in “permanent light” illuminate in every operating state. In power system operation, the lights are supplied with 230/240 V, 50/60 Hz. In battery operation, the switching unit installed in the safety lighting system supplies power to the safety lights. Standby light (BS) Safety lights switched in “standby” illuminate when the normal lighting fails (power failure) and for a manually or automatically activated continuous operation test. Should the power system fail, the control unit switches to battery operation. The direct current fed over the switching unit supplies the lights, until the power system is restored or the exhaustive discharge protection is activated. 10.4.5 Final Circuits in the Fire Area The requirements placed on fire protection have resulted in a greatly increased installation effort. To address this development in the final circuits, in addition to the previously mentioned three circuit types, a fourth circuit type has been developed – allowing free programming in the circuit. In this case, only two final circuits are required for each fire area. Permanent, standby or switched lights can be attached at any point of such a circuit. Power is always present at all lights and the system module in the lights blocks or releases the power to the ECG. The installation is made in the conventionally installed safety lighting circuits without additional Switched permanent light (DLS) Safety lights switched in “switched permanent light” illuminate when the general lighting is switched on, the general lighting fails or for a manually or automatically activated continuous operation test. This circuit type allows the safety lighting to be integrated seamlessly in the general lighting. User-configurable circuit (STAR) Safety and rescue sign lights in the DS, BS, DLS circuit types are operated using a patented technology on the usual 3-pole power cable. Software that runs on the Windows user interface is used to program the CEAG products. 10/25 10 6 circuits BS BS DS BS DLS DLS Fig. 10.4/2: Traditional installation with the DS, BS, DLS circuits; two circuits are prescribed for each type (a total of six circuits) 2 circuits BS BS DS BS DLS DLS Fig. 10.4/4: Safety lighting system with the appropriate E30 wiring using three fire areas in a building. The hybrid circuits (STAR) reduces the wiring effort by 50% for each of the two supply leads. Fig. 10.4/3: Installation with user-configurable circuits (STAR hybrid circuit) requires only two final circuits for all circuits. Subsequent change to the circuit type is possible without any problems. tion (transient system fault) at the end of 2/3 of the nominal operating time. In addition, for group and central battery systems: Behavior of the general lighting in case of the power system recovery Execution of the network monitoring Documentation (DIN EN 50172) SCSG fire protection Absence of system perturbations (DIN EN 50172) Ageing reserve for the battery (DIN EN 50171) Informationstechnik, German Commission for Electrical Engineering, Electronics, Information Technology) in the DIN and VDE. This means the following standards should be used for newly planned safety lighting systems: DIN VDE 0100-718 provides basic statements about the installation of a safety lighting system, E DIN VDE 0108-100; 2005-10 provides additional information for battery-backed systems. 10.4.6 Test of a New System To ensure that the safety lighting has been installed correctly, a test by an authorized expert must be made prior to the initial commissioning. The expert must certify the effectiveness and operational reliability of the system. The test inspector must test at least the following parameters: For all systems Nominal illuminance including an ageing allowance (E DIN VDE 0108-100; 2005-10) Measurement of the lighting system values in accordance with DIN 5035-6 Power system recovery and reactiva- 10.4.7 Standards As of March 2007, VDE 0108-1 to VDE 0108-8 should no longer be used. DEN 50172 (VDE 0108-100: 2005-01) has already been supplemented in 2005 (E DIN VDE 0108-100: 2005-10). The immediate use of this draft is recommended by the responsible UK 221.3 of the DEK (Deutsche Kommission für Elektrotechnik Elektronik Contact: CEAG Notlichtsysteme GmbH Senator-Schwartz-Ring 26 59494 Soest, Germany Telephone: +49 (0) 29 21 / 6 9-8 70, Fax: +49 (0) 29 21 / 69-6 17 Internet: www.ceag.de E-mail:
[email protected] 10/26 Totally Integrated Power by Siemens Ease of Operation, Safety and Control Engineering 10.5 Robust Remote Terminal Unit for Extreme Environmental Conditions (SIPLUS RIC) The requirements for the simple inclusion of data from peripheral sources in the existing control systems increase. Ease of operation, optimization and monitoring tasks must be satisfied. The communication paths are very comprehensive and often also long; the data sources are very diverse and often must be changed in remote, inhospitable regions. This means the remote terminal unit must be correspondingly flexible. General requirements placed on a remote control system for extreme environmental conditions Extended temperature range from -40 to +70 °C Standard transmission protocols, observance of communications standards such as IEC 60870 Low energy consumption Robust construction suitable for outdoor use, stainless steel housing Simple installation and commissioning Over-voltage protection Faster availability at the site of installation and prepared external connections Expandible hardware and software Versatile communication connections and protocols to the control center High data security Compatibility to existing control systems Environmental conditions / outdoor operation The housing constructed as a robust stainless steel unit and the electronics designed for operation in a wide temperature range from -40 to +70 °C makes the remote terminal unit suitable for use as outdoor device. For protection from aggressive gases, humidity and condensation, the electronic circuit boards can be coated with a protective varnish. Dialectric strength of the inputs and outputs Depending on the application and the site of installation, high requirements are placed on the electrical loading capability of the inputs. For operation in electrical power distribution systems, the inputs and outputs must be designed for maximum surge voltages of 3.5 kV. Wide-range power supplies The integrated wide-range power supplies that can be operated with both 110/230 V AC and 24/110 V DC allow the devices to be connected directly to the available power supply without requiring any additional power converter. This saves not only engineering expense, but also hardware and installation. Communication The international standard protocols developed for applications in the power transmission and distribution sectors permit a reliable data transmission also over large distances. The actual communication medium can be: Modem with wire connection Ethernet Optical fiber conductor Wireless/GPRS Use of communications standards The communications types for remote control systems agreed in international committees are specified in the IEC 60870-5-101 and -104 standards and prove a high and reliable standard. The observance of these standards ensures the simple and reliable data exchange. Comprehensive know-how is available worldwide. Examples of the functions defined by the IEC required uniformly for WAN: Data types with attributes Communication or operating modes Clock handling Operational and alarm signalling Preprocessing of measured values and counter values Command processing Diagnostic functions Control center link Depending on the application, the data must be interfaced to control centers. For a SIMATIC solution, the remote terminal unit is accessed from a CPU of the S7-300 or S7-400 series. The connection between the CPU and the remote terminal unit is based on the standard protocol IEC 60870-5101 or 60870-5-104 using an appropriate communications medium (cable, optical fiber conductor, wireless, mobile radiocommunications, …). If information needs to be exchanged with power supply system operators, utility companies, etc., the remote terminal unit can perform this task directly. The building services control system or automation system is decoupled. The interface between the operators is a clearly defined hardware interface. No intervention is made in the building services control system. 10/27 10 Connection of the remote terminal unit to an existing control center The use of standardized remote control protocols makes the inclusion of SIPLUS RIC in SCADA (Supervisory Control and Data Acquisition) systems easy to implement. The SIPLUS RIC product family sets the standard in the industry with regard to flexibility, robustness and ease of use. The connection to SIMATIC, in particular, allows the use of the best features of both systems. The platform basis is SIMATIC S7 Long-term availability Standard portfolio, stocks of spare parts Familiar look-and-feel Same tool, no new on-the-job learning, no new training Platform expansion with SIPLUS extreme Hardened against temperature effects Hardened against environmental effects with a contour-adapted coating (conformally coated) Platform expansion with SIPLUS RIC IEC protocols implemented as application, no version dependency Expanded with outdoor devices Photo 10.5/1: Modular, hardened remote control system (from the left: main module, motor control module, analog inputs/outputs, digital inputs/outputs) Cost-optimized design For the selection of the devices, to avoid the need for expensive engineering, ensure that the basic version already includes all components required for operation, such as power supply, inputs, outputs and communications interfaces. To extend the data volume, expansion modules supplied with power from the base unit can be plugged in. Simple installation For installation, the device is simply snapped on a mounting rail. All connections are made using plug connectors. This allows connection to be prepared in advance so that the commissioning cables only need to be plugged in. Compatibility Easy compatibility between the SIMATIC CPU and the remote control system makes the application very flexible. This allows the benefits of both systems (automation and remote control system) to be used. The main module is fully equipped with Power supply (AC or DC) Communications interfaces (LAN, electrical or optical fiber conductor) 16 digital inputs 4 analog outputs 16 digital outputs Expansion modules can be extended with one or more of the following units DI 16, digital inputs AI 8, analog inputs CO 16, digital outputs MCU, Motor Control Unit Available protocols IEC 870-5-101 IEC 870-5-104 In preparation: ModBus RTU Further information: Siemens AG A&D SE S5 Würzburger Str. 121 90766 Fürth Claus-Thomas Michalak Klaus Czwalinna Tel.: +49 (0) 9 11 / 7 50-23 04 Tel.: +49 (0) 9 11 / 7 50-49 78 E-mail:
[email protected] E-mail:
[email protected] Photo 10.5/2: Possible connection of the remote terminal units to a SIMATIC system 10/28 Totally Integrated Power by Siemens Appendix chapter 11 11 Appendix A1 Standards, Regulations and Guidelines DIN 57100 VDE 0100 DIN VDE 0100-710 When planning and erecting buildings, many standards, regulations and guidelines must be observed and complied with in addition to the explicit specifications made by the building and plant operator (e.g. factory regulations) and the responsible power distribution network operator. The following list shall give you an overview of the most important documents in this context. Erection of low-voltage installations with rated voltages up to 1,000 V Erection of low-voltage installations – Requirements for special installations or locations – Part 710: Medical locations Erection of low-voltage installations – Requirements for special installations or locations – Part 718: Installations for gathering of people Power installations exceeding 1 kV Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents Operation of electrical installations – Part 100: General requirements Withdrawn, currently DIN VDE 0100-710 Withdrawn, currently DIN VDE 0100-718 (transition period until 03/2007) Earthing system for special power installations with nominal voltages above 1 kV Protection against lightning – General principles Safety requirements for secondary batteries and battery installations – Part 2: Stationary batteries Telecommunications; general concepts; requirements and tests for the safety of facilities and apparatus Workplace Ordinance Regulations (of the German Länder) on the construction of utilities rooms for electrical installations Instruction for the protection from acoustic exposure “Technical supply conditions set by the local power distribution network operator” DIN VDE 0100-718 DIN VDE 0101 DIN EN 60909-0 VDE 0102 DIN VDE 0105-100 (VDE 0107) (VDE 0108) DIN VDE 0141 DIN VDE 0185-1 DIN EN 50272-2 VDE 0510-2 DIN VDE 0800-1 Arb.Stätt. VO Elt Bau VO TA-Lärm TAB The stipulations made by TÜV, TÜH, and Dekra Rules for the prevention of accidents Official regulations (e. g. state building regulations) and other conditions for building imposed by authorities Expertise on fire safety and expert concepts Further notes on planning, configurations and layout: VDI 2078 To calculate the cooling load in air-conditioned rooms AGI J 12 Construction of rooms for indoor switchgear, Worksheet published by Arbeitsgemeinschaft Industriebau e. V. (AGI) (Working Group on Industrial Building) Applicable VDE standards can be found in the standards database provided by VDE Publishing House (www.vde-verlag.de). Table A1/1: Standards, regulations and guidelines 11/2 Totally Integrated Power by Siemens Appendix A2 Safety Standard for Low-Voltage Switchgear Assemblies Requirements on low-voltage switchgear regarding their heat dissipation, packing density, management of high short-circuit currents and insulation strength have risen tremendously in recent years. Safe operation of low-voltage switchgear is only ensured if the manufacturer observes all standards applicable to the switchgear assembly and is able to present proof thereof. Only switchgear in compliance with currently valid standards satisfy present-day safety regulations. Type-tested assemblies (TTA) In such an assembly, all components alone as well as their functionable assembly, including all electrical an mechanical connections have been type-tested. The prerequisite for the use of other switching/protective devices is that their technical data are at least identical or better (conclusion by analogy). Partially type-tested assemblies (PTTA) Such assemblies contain type-tested and not type-tested components. Not type-tested components must be derived from type-tested ones. For type-tested assemblies all proof must be produced by means of testing. There are two exceptions for partially type-tested assemblies: 1. Proof that temperature-rise limits are kept. In circuits of max. 3,150 A feeding current this proof may also be produced by means of extrapolation. 2. Proof of the short-circuit strength is ommitted for switchgear which is protected by a current-limiting device with a let-through current ≤ 15 kA. If extrapolation or calculation according to DIN VDE 0660 Part 500 is required, it shall always be based upon a deduction of type-tested systems. Only if all proof has been produced unambiguously, the system in question is a type-tested switchgear assembly or a partially type-tested assembly. Hence, these assemblies meet the relevant safety regulations. The following standards apply: IEC 60439-1, VDE 0660 Part 500 Low-voltage switchgear and controlgear assembly Type-tested and partially type-tested assemblies The content of these two standards is identical. They show two possibilities to manufacturelowvoltage switchgear: • Type-tested assemblies (TTA) • Partially type-tested assemblies (PTTA) Required proof for compliance with standards Requirement 1. Temperature-rise limit 2. Dielectric strength 3. Short-circuit strength 4. Effectiveness of the protective conductor 5. Creepage distances and clearances in air 6. Mechanical function 7. IP degree of protection TTA Test Test Test Test Test Test Test PTTA Test or extrapolation Test Test or extrapolation Test Test Test Test 11/3 11 A3 IP Degree of Protection according to IEC 60529 4 Designation Protection by an enclosure is indicated in the IP code as follows Meaning for the protection of equipment: IP.X 3 C 0 1 Second code figure 2 3 4 5 6 8 9 Meaning for the protection of persons Protected against access to dangerous parts with a (not protected) Additional letter (optional) back of the hand finger tool wire wire wire IP.X A B C D Protected against ingress of water with harmful effects (not protected) vertical drops drops (15 ° inclination) sprayproof splashproof hoseproof jetproof (strong jets) temporary immersion in water permanent immersion in water Meaning for the protection of persons: Protected against access to dangerous parts with a back of the hand finger tool wire 4.1 IP code layout Code letters (International Protection) First code figure (figures 0 to 8 or letter X) Second code figure (figures 0 to 8 or letter X) Additional letter (optional) (letters A, B, C, D) IP 2 Meaning for the protection of equipment: IP.X 0 First code figure 1 2 3 4 5 6 Protected against ingress of foreign matter (not protected) ≥ 50 mm in diameter ≥ 12.5 mm in diameter ≥ 2.5 mm in diameter ≥ 0.04 in in diameter dust-protected dustproof 11/4 Totally Integrated Power by Siemens Appendix A4 Installation Guidelines for Cables and Wires Again and again, cables and wires are laid wrongly. When recoiling or unwinding, damage may already be inflicted (Fig. A4/1). Their tensile and thermal loads are often not looked into. The following installation guidelines shall help to minimize trouble. Cabling must be selected appropriate to the installation and operating conditions. It must be protected against mechanical, thermal or chemical impact, as well as against the ingress of moisture from the cable ends. Insulated high-current power cables must not be buried in the ground. Temporary covering of rubber sheathed cables, type NSSHÖU, or cable tracks with soil, sand or similar, e.g. on construction sites is not considered as burying. Fixtures of stationary cables and wires must not damage them. If cables and wires are laid horizontally on walls or ceilings and fastened with clips, for cables and wires which are not reinforced, the 20-fold outer diameter is an approximate value for clip spacing. This spacing also applies to brackets for laying on cable ladders and racks. When laid vertically, clip spacing may be increased as appropriate for the cable or clip type. For connection to non-stationary equipment, flexible cables must be relieved from tensile load and shearing at the entry points into the casing and secured against twisting and kinking. The outer cable sheath must not be damaged by the tension relief devices. Standard models of flexible PVC cables are not suitable for outdoor installation. Flexible rubber sheathed cables (e.g. NEOFLEX cables) are only suitable for permanent use outdoors if their outer sheath consists of plastic material, normally based on polychloroprene (e.g. Neoprene). Special cables must be used for permanent application in water. Cable systems with functional endurance These cable systems must be designed in compliance with the type tests (DIN 4102-12). Thermal load Temperature-rise limits for the respective cable design are included in the technical data. The upper limits must not be exceeded because of cable heating on account of current heat dissipation and ambient thermal impact. The lower limits specify the lowest permissible ambient temperature. Tensile load Tensile load of conductors should be as low as possible. The following tensile load on cable conductors must not be exceeded: Cables for non-stationary equipment For cable installation and operation intended for non-stationary equipment, a maximum of 15 N per mm2 conductor cross section is permitted, whereby cable screens, concentric conductors and split protective conductors are not counted. Cabling which is subject to dynamic stress in operation, e.g. in cranes with a high accelaration force, in power chains with a great movement frequency, appropriate measures must be taken, e.g. increasing the bending radius in the individual case. Otherwise the cable service life may be impaired. Cables for fixed installationg The maximum tensile load for fixed cable installation is 50 N per mm2 conductor cross section. B B B B A A A A Fig. A2/1: Recoiling and unwinding of cables For further information on these installation guidlines please refer to DIN VDE 0298-1 DIN VDE 0891 11/5 11 A5 Fire Load Values of Cables and Wires Fire load calculations are gaining more and more importance for public buildings. Depending on the material type, cables and wires have different mean fire load values. The fire loads given in the table below are nonbinding guide values only. Integration of fire loads at and in buildings into the calculation. As far as the assessment and limitation of consequential fire risks are concerned, there are different national laws and standards to date. In Germany, the applicable state building regulations for buildings stipulate that certain limits regarding the accumulation of combustible parts directly connected to the building, such as cables and wiring of building installations, be also taken into account (see Supplement 1 of VDE 0108 Part 1). Material Type PVC PE PS PA PP PUR TPE-E TPE-O NR SIR EPR EVA CR CSM PVDF ETFE FEP PFA PTFE HFFR HFFR cross-linked Note: Fire load in kWh/kg Average 5.8 12.2 11.5 8.1 12.8 6.4 6.3 7.1 6.4 5.0 6.4 5.9 4.6 5.9 4.2 3,.9 1.4 1.4 1.4 4.8 4.2 Fire load value in MJ/kg Average 21 44 42 26 46 23 23 26 23 18 23 21 17 21 15 14 5 5 5 17 15 The above mentioned calculation is only applicable to cables and wires whose combustible materials are fully made of the same material type and do not contain any other metal parts besides the copper content. Product-specific fire load values in form of a table can beobtained on request for: ÖLFLEX CLASSIC 100H, ÖLFLEX CLASSIC 110H, ÖLFLEX® CLASSIC 110 CH, ÖLFLEX 120H, ÖLFLEX 130H, ÖLFLEX 120 CH, ÖLFLEX FD 820 H und ÖLFLEX FD 820 CH. Conversion of quantities: 1 kWh/m = approx. 3.6 MJ/m; 1 MJ/m = approx. 0.227 kWh/m. 11/6 Totally Integrated Power by Siemens Appendix A6 Table of Nominal Illuminance Type of indoor area or activity Nominal illuminance En [lx] Comment 1. General areas 1.1 Traffic zones in storerooms 1.2 Storage areas 1.2.1 Storage areas for similar or large-unit goods 1.2.2 Storage areas with search requirements for non-similar storage goods 1.2.3 Storage areas with reading requirements 1.3 Automatic high-rack warehouse 1.3.1 Corridors 1.3.2 Operator station 1.4 Dispatch center 1.5 Recreational, sanitary and medical care facilities 1.5.1 Canteens 1.5.2 Other recreational rooms and resting areas 1.5.3 Rooms for physical exercise 1.5.4 Changing rooms 1.5.5 Washing rooms 1.5.6 Lavatories 1.5.7 Medical rooms, rooms for first aid and medical care 1.6 Building services, utilities 1.6.1 Machine rooms 1.6.2 Power supply and distribution 1.6.3 Telex, post room 1.6.4 Telephone operator 100 100 500 30 200 100 300 100 100 100 500 Possibly additional illumination of mirrors Atmospheric lighting, possibly incandescent lamps 2 200 200 50 100 200 50 2. Traffic routes inside buildings 2.1 For people 2.2 For people and vehicles 50 100 Adjustment of nominal illuminance to adjacent areas: En1 ≥ 0.1 En2 where: En1 = En of the traffic routes En2 = En of adjacent areas 2.3 Stairs, moving escalators and inclined traffic routes 2.4 Loading platforms 2.5 Automatic conveyor systems or belts in the vicinity of traffic routes 2.6 Gateway areas 2.6.1 For day shift 2.6.2 For night shift 100 100 100 2 x En min. 400 lx 0.5 En to 0.2 En 11/7 11 A6 Table of Nominal Illuminance Type of indoor area or activity Nominal illuminance En [lx] Comment 3. Offices and similar rooms 3.1 Office rooms with daylight-oriented workplaces only in the immediate vicinity of windows 3.2 Office rooms 3.3 Open-plan offices – high level of reflection – medium reflection 300 500 750 1,000 High levels of reflexion: ceilings with min. 0.7, walls/partitions min. 0.5. Single-user lamps useful En referred to a typical position of the drawing board of 70 ° towards the horizontal plane; in the center 1.2 m high Workplace-oriented general lighting, at the workplace at least 0.8 En 3.4 Technical drawing 750 3.5 Conference and meeting rooms 3.6 Reception rooms 3.7 Areas with access to the public 3.8 Areas for data processing 300 10 200 500 4. Chemical industry 4.1 Process plants, remote- controlled 4.2 Process plants with occasional manual intervention 4.3 Permanently occupied workplaces in process plants 4.4 Measuring desks and stations, control platforms and desks 4.5 Laboratories, fabrication 4.6 Works requiring advanced viewing tasks 4.7 Color checks 50 100 200 300 300 500 1,000 Single-user lamps useful. Pay attention to color rendering. If required for operative reasons: En < 300 lx 5. Cement industry, ceramics and glass making 5.1 Workplaces and areas near kilns, at mixers for raw material; crushers in brickyards 5.2 Enameling, rolling, pressing, forming of simple parts, glazing, glass blowing 5.3 Grinding, etching, polishing of glass, forming of fine parts, manufacture of glass instruments 5.4 Decoration work 5.5 Grinding of optical lenses, crystal glass, off-hand grinding and engraving, medium-quality work 5.6 Fine work 200 300 500 500 750 1,000 Single-user lamps useful 11/8 Totally Integrated Power by Siemens Appendix A6 Table of Nominal Illuminance Type of indoor area or activity Nominal illuminance En [lx] Comment 6. Iron and steel works, rolling mills, large foundries 6.1 Production plants without manual intervention 6.2 Production plants with occasional manual intervention 6.3 Permanently occupied workplaces in production plants 6.4 Measuring desks and stations, control platforms and desks 6.5 Test and quality check stations 50 100 200 300 500 If required for operative reasons: En < 300 lx If required for operative reasons: En < 500 lx 7. Metal processing 7.1 Handforging of small parts 7.2 Welding 7.3 Workstations, automated or semi-automated machinetools 7.4 Coarse and medium machine work; permissible tolerance > 0.1 mm 7.5 Fine machine work; permissible deviation < 0.1 mm 7.6 Workplaces with robots 7.7 Marking, measuring and inspection workplaces 7.8 Cold rolling mills 7.9 Wire and tube drawing, production of cold strip sections 7.10 Metal sheet processing 7.11 Manufacture of tools and cutlery 7.12 Assembly 7.12.1 coarse 7.12.2 medium-fine 7.12.3 fine 7.13 Drop-forging 7.14 Foundries 7.14.1 Accessible subterranean tunnels, conveyor belts, cellars etc. 7.14.2 Platforms 7.14.3 Sand conditioning 7.14.4 Dressing station 7.14.5 Workplaces at the cupola and mixer 7.14.6 Casting houses 7.14.7 Shake out places 7.14.8 Machine molding 7.14.9 Manual molding 7.14.10 Core making 7.14.11 Pattern making 7.15 Diecasting shops 7.16 Surface treatment 50 100 200 300 200 30 200 200 300 300 500 300 200 300 500 200 200 300 300 300 500 300 750 200 300 300 500 For permissible tolerances see DIN 7168 Part 1 11/9 11 A6 Table of Nominal Illuminance Type of indoor area or activity Nominal illuminance En [lx] 300 500 750 1,000 Comment 7.16.1 Electroplating 7.16.2 Smoothing, painting, varnishing 7.16.3 Check stations 7.17 Tool, gage, model and jig construction, precision tool making high-precision assembly 7.18 Automotive production plants Single-user lamps useful At assembly lines with workplacerelated fluorescent lighting, glare reduction can be ommitted if plant conditions require this 7.18.1 Body shop 7.18.2 Body, surface treatment 7.18.3 Paintshop – spray booth 7.18.4 Paintshop – polishing stations 7.18.5 Paintshop – finishing 7.18.6 Upholstery 7.18.7 Final assembly of car body and chassis 7.18.8 Inspection 500 500 1,000 750 1,000 500 500 750 8. Power plants 8.1 Feeder systems 8.2 Boiler house 8.3 Pressure compensation rooms in nuclear power plants 8.4 Machine rooms 8.5 Adjoining rooms, e.g. pump stations, condenser rooms 8.6 Switchgear stations in buildings 8.7 Control rooms 8.8 Maintenance work at the turbine and generator 50 100 200 100 50 100 300 500 If required for operative reasons: En < 300 lx Additional lighting for the duration of the work 9. Electrical/electronic industry 9.1 Cable and wire production, varnishing and impregnation of coils, assembly of large machinery, simple mounting work, winding of coils and armatures with coarse wire 9.2 Assembly of telephones, small motors, winding of coils and armatures with medium-size wire 9.3 Assembly of small equipment, radios and TV sets, winding of fine wire coils, fuse production, adjusting, testing, calibrating 9.4 Assembly of smallest parts, electronic components 300 500 1,000 1,500 Single-user lamps useful 11/10 Totally Integrated Power by Siemens Appendix A6 Table of Nominal Illuminancee Type of indoor area or activity Nominal illuminance En [lx] Comment 10 Jewelry, watch and clock making industry 10.1 Jewelry making 10.2 Gem cutting 10.3 Optician’s and watchmaker’s workshops 1000 1500 1500 Single-user lamps useful 11 Wood working 11.1 Steaming pits 11.2 Frame saws 11.3 Work at the planing bench, glueing, assembly 11.4 Selection and check of veneer wood, inlays 11.6 Working at woodworking tools, turning, chamfering, dressing, rabbeting, slitting, cutting, sawing, milling 11.7 Wood finishing 11.8 Quality checks 200 300 500 500 500 750 12 Paper making, graphic and printing industry 12.1 Work at hollander engines, edge runners and pulp mills 12.3 Ordinary bookbinder’s work, wallpaper printing 12.4 Gilding, blocking or blind-tooling, work at printing presses 12.5 Retouching, manual and machine typesetting 200 300 500 1000 Avoid glare by reflection by means of suitable angles of incidence; diagonally from side for manual typesetting Single-user lamps useful 12.2 Paperboard, corrugating and cardboard machines, cardboard production 300 12.6 Color checking for multi-colored prints 12.7 Steel and copper engraving 12.8 Photo typesetting, reproduction 12.9 Page layout finishing, copying 1500 2000 500 800 13 Leather industry 13.1 Work at tubs, vats and pits Prevent reflections by choosing suitable angles of incidence 13.2 Scraping, slicing, rubbing, tumbling of skins 13.3 Saddler’s work, stitching, sewing, polishing, sorting, pressing, cutting to size, punching, shoe making 13.4 Leather dyeing (machine-dyeing) 13.5 Quality checks 200 300 500 750 For darker materials increase to 1,000 lx, possibly by single-user lights Ensure vertical lighting of vats 11/11 11 A6 Table of Nominal Illuminance Type of indoor area or activity Nominal illuminance En [lx] 750 1,000 1,500 Comment 13.5.1 for medium demands 13.5.2 for superior demands 13.5.3 for premium demands For surface checks: additional lighting with diagonal incidence; single-user lamps useful Single-user lamps useful; pay attention to color rendering 13.6 Color checks 1,000 14 Textile manufacture and processing 14.1 Workplaces and areas at baths and breaking of bales 14.2 Carding, washing, ironing, work at opening and carding machines, stretching, combing, slashing, card cutting, roving, jute and hemp roving 14.3 Dyeing 14.4 Preparing the yarn or warp beam, warping, spinning, spooling, reeling, twining, twisting, knitting, emboidering, weaving 14.5 Pricking, perching, sewing, cloth printing 14.6 Millinery 14.7 Burling, napping 14.8 Invisible mending 14.9 Quality and color checks 200 300 300 500 750 750 1,500 1,500 1,000 Single-user lamps useful, pay attention to color rendering 15 Food, beverage and tobacco industry 15.1 Workplaces and work areas in the brewery, at the malt-floor, for washing down, filling in barrels/kegs, cleaning, sieving, peeling, food processing in the cannery, and work in chocolate factories, workplaces and work areas in sugar refineries, for the drying and fermenting of crude tobacco, fermenting cellar 200 15.2 Picking and washing of produce; grinding, mixing, packing 15.3 Workplaces and work areas at slaughterhouses, butchers’ shops, dairies, grinding mills and filtering floors 15.4 Cutting and sorting of fruit and vegetables 15.5 Preparation of delicatessen, kitchens; manufacture of cigars and cigarettes 15.6 Quality checks of glass jars and product checks; garnishing, decorating, sorting 15.7 Color checks, laboratories 300 300 300 500 500 1,000 Single-user lamps useful, pay attention to color rendering Depending of the workplace layout, ensure sufficient vertical illuminance 11/12 Totally Integrated Power by Siemens Appendix A6 Table of Nominal Illuminance Type of indoor area or activity Nominal illuminance En [lx] Comment 16 Wholesale and retail trades 16.1 Shops 16.2 Cashier’s desks 300 500 17 Crafts and trades (examples from various industries) 17.1 Flame conditioning and painting of steel parts 17.2 Preassembly of heating and ventilation systems 17.3 Locksmith’s and plumber’s shops 17.4 Garages 17.5 Joiner’s workshops on construction sites 17.6 Repair shops for machinery and apparatus 17.7 Radio and TV repair shops 200 200 300 300 see no. 11 500 500 Select nominal illuminance according to no. 11 18 Service sector 18.1 Hotels and restaurants 18.1.1 Reception 18.1.2 Kitchen 18.1.3 Dining room 18.1.4 Conference rooms 18.1.5 Self-service restaurants 18.2 Launderettes and dry cleaners 18.2.1 Washing 18.2.2 Machine ironing 18.2.3 Manual ironing 18.2.4 Sorting 18.2.5 Stains removal quality check 18.3 Hair styling 18.4 Cosmetics 300 300 300 300 1000 500 750 Single-user lamps useful 200 500 200 300 300 19 Plastic processing 19.1 Injection molding 19.2 Blow molding 19.3 Pressing 500 300 300 11/13 11 Abbreviations A AA (or ST) AC ACB AGI ANSI AR AS ASR ASTM B BetrSichV BGVR “Betriebssicherheitsverordnung”, Ordinance on Industrial Safety and Health “Berufsgenossenschaftliche Vorschriften und Regeln für Sicherheit und Gesundheit bei der Arbeit” Regulations and rules for safety and health at work by the workers' compensation insurance carriers Shunt release Alternating current Air Circuit-breaker Arbeitsgemeinschaft Industriebau, German working group on industrial building American National Standards Institute Automatic reclosing Auxiliary switch “Arbeitsstätten-Richtlinie”, Workplace Regulation American Society for Testing and Materials Cu CSA CSV CIM Common Information Model, IEC standard (cf. IEC 61970) for the integration von IT systems in the power generation and distribution industry Canadian Standards Association (file) Character Separated Values, Comma Separated Values or Semi-Colon Separated Values; text file for saving and exchanging simple-structured data in which the individual data items are separated by commas, semicolons or other symbols Copper D DALI Digital Adressable Lighting Interface; protocol for controlling digital lighting equipment in buildings Direct current Dimensioning factor; ratio of the rated apparent power Sgen to the apparent power SUPS of the uninterruptible power supply Deutsches Institut für Normung e. V.; German industrial standard Definite-time overcurrent-time protection DC DF DIN DMT C CAN CB CCA Controller Area Network; field bus system developed by Bosch for networking controllers in automobiles Circuit-breaker CENELEC Certification Agreement; an agreement which entitles European manufacturers to obtain a national certification mark for their electrical engineering products, based upon test results from an approved institute of one of the particpating countries. (source: http://www.ul-europe.com/de/ solutions/marks/cca.php) (marking) Communauté Européenne; European Community; using the CE mark, manufacturers confirm the conformity of their products to the relevant EC Directives and compliance with “essential requirements” stipulated therein Comité Européen de Normalisation Electrotechnique; European Committee for Standardization in Electrical Engineering Continuous Function Chart; Siemens engineering tool for graphic editing of automation functions based on prepared function blocks under the Microsoft Windows operating systems Central grounding point Combined heat and power plant E EC ECG EIB EMC EN EnEV EPR ETS ETU EVA European Community Electronic control gear European Installation Bus Electromagnetic compatibility European standard Energieeinsparverordnung Ethylene propylene rubber EIB Tool Software Electronic trip unit Ethylene vinyl acetate CE CENELEC F FB FELV FIFS FTP Fuse-block; fuse socket with fuse-link Functional extra-low voltage Fault current Fault signal switch File Transfer Protocol; specific network protocol for data transmission via TCP/IP networks CFC CGP CHP 11/14 Totally Integrated Power by Siemens Appendix G GPS General power supply LV LV HRC LVMD Low-voltage Low-voltage high rupturing capacity fuse Low-voltage main distribution H HDP HV HRC HVAC HOAI High Definition Prismatics; lighting technology deveoloped by Siteco High-voltage high rupturing capacity fuse Heating, ventilation, air conditioning Honorarordnung für Architekten und Ingenieure, Regulation of Architects’ and Engineers’ Fees in Germany M MCB MCCB MES MKT MLAR MSP Internal Arc Classification Instantaneous electromagnetic release Instrumentation and Control Cargo Cabinet; container for electrical/electronic and control systems, suitable for transportation by air International Electrotechnical Commission Insulated Gate Bipolar Transistor; used in motor drives, traction power controls, UPS systems and power supply units, for example International Protection (acc. to DIN); Protection against ingress (of) Internet Protocol International Organization for Standardization MPCB MV MVMD Miniature Circuit-breaker Molded-case circuit-breaker Manufacturing Execution System Capacitor type Sample Directive on Fireproofing Requirements for Line Systems Motor Starter Protector Motor Protector Circuit-Breaker Medium-voltage (supply) Medium-voltage main distribution I IAC I-release ICCC N NES 713 NF NiCd Standard on the toxicity of flames Norme Française Nickel cadmium IEC IGBT IP (code) IP ISO O ODBC OLE Open DataBase Connectivity; standardized database interface, used as database query language in –> SQL (–> OPC) Object linking and embedding; a Microsoft proprietary object system and protocol which enables interaction of different (OLE-capable) applications and thus the creation of heterogenous composite documents OLE for Process Control; standardized software interface Optical waveguide K KUPS KNX UPS factor Konnex; building systems technology in compliance with EN 50090 OPC OWG L LAN L-release LC LCD LED LEMP LOI LPZ LSC Local Area Network Inverse-time (long-time) delayed release (~ resonant circuit), inductive-capactive resonant circuit Liquid crystal display Light Emitting Diode Lightning electromagnetic pulse Limited Oxygen Index Lightning protection zone Category of operational availability of (medium-voltage) switchgear P PDF PMMA PTB PROFIBUS Portable Document File; cross-platform file format developed by Adobe Systems Polymethylmethacrylate Physikalisch-Technische Bundesanstalt, highest German federal agency for testing, calibrating and approvals Process Fieldbus PROFIBUS DP PROFIBUS distributed periphery PTTA PV PVC Partially type-tested (switchgear) assembly Photovoltaics Polyvinyl chloride 11/15 11 R RAID RCBO RCD RCCB Redundant Array of Independant Discs Residual-current-operated circuit-breaker with integral overcurrent protection Residual current protective device Residual-current-operated circuit-breaker TÜV Technischer Überwachungsverein, German service organization for technical inspection and safety tests, now the brand name for technical and life safety approvals concerning industrial applications as well as the private consumer U UGR Unified glare rating Uninterruptible power supply S S-release SCADA SBS SD SDF SF SF6 SEMP SNMP Short-time-delayed overcurrent release Supervisory Control and Data Acquisition Static bypass switch Switch-disconnector Switch-disconnector-fuse; switch disconnector with fuse Simultaneity factor Sulphur hexafluoride Switching electromagnetic pulse Simple Network Management Protocol, for easy control and monitoring data network components such as routers, servers, switches, printers, computers etc. from a central server Structured Query Language; programming language for the definition, query and manipulation of data for relational databases Seamless Telecommunication Architecture Static transfer switch Safety power supply UPS V VDE VDI VRLA Association for Electrical, Electronic & Information Technologies Verein Deutscher Ingenieure e.V., Association of German Engineers Valve Regulated Lead Acid W WHG WMF Wasserhaushaltsschutzgesetz, German Federal Water Act Windows Metafile; vector-based graphics format developed by Microsoft SQL Z ZVEH ZVEI Central Association of Electrical and IT Trades in Germany Zentralverband Elektrotechnik- und Elektronikindustrie e.V., German Electrical and Electronic Manufacturers’ Association Zone-selective interlocking (also called short-time grading control) STA STS SPS ZSI T TA TAB TCP THD TIP TM TTA TÜH Technical instruction, in Germany, on various (environmental) issues, such as air pollution, noise etc. Technical supply conditions (of the power supply network operator) Transmission Control Protocol Total Harmonic Distortion Totally Integrated Power Thermal-magnetic tripping Type-tested assembly; type-tested switchgear assembly Staatliche Technische Überwachung Hessen, Technical Control Association in the State of Hesse, as a joint venture by the TÜV Süd and the State of Hesse 11/16 Totally Integrated Power by Siemens Appendix Your Siemens Contact Partners Consultant Support Hamburg Dieter Drescher Tel.: +49 40 2889-2084 E-mail:
[email protected] Erfurt Ralf Heinemann Tel.: +49 361 753-3355 E-mail:
[email protected] Düsseldorf Bernd Wagner Tel.: +49 211 399-2769 E-mail:
[email protected] Frankfurt Nikolaos Kartalas/Ralph Samulowitz Tel.: +49 69 797-5016 Tel.: +49 69 797-3370 E-mail:
[email protected] E-mail:
[email protected] Munich Wolfgang Bährle/Bernhard Hartel Tel.: +49 89 9221-3453 Tel.: +49 89 9221-6978 E-mail:
[email protected] E-mail:
[email protected] Hannover Gerd Schwarzbach Tel.: +49 511 877-1539 E-mail:
[email protected] Dresden Jürgen Borsdorf Tel.: +49 351 844-4414 E-mail:
[email protected] Cologne Jürgen Hupperich Tel.: +49 221 576-3137 E-mail:
[email protected] Nuremberg Wilhelm Ebentheuer Tel.: +49 911 654-3969 E-mail:
[email protected] Berlin Dr. Erich Maut Tel.: +49 30 386-33021 E-mail:
[email protected] Leipzig Heiko Tritschler Tel.: +49 341 210-221 E-mail:
[email protected] Essen Frank Röhling Tel.: +49 2739 89285-1 E-mail:
[email protected] Stuttgart Klaus Häberlen/Karl-Heinz Markert Tel.: +49 711 137-2221 Tel.: +49 711 137-2634 E-mail:
[email protected] E-mail:
[email protected] Contacts for Special Interests Elevators, escalators, moving walkways OTIS GmbH & Co. OHG Otisstraße 33 D-13507 Berlin Tel.: +49 30 4304-1600 Fax: +49 30 4304-2585 Safety lightingng CEAG Notlichtsysteme GmbH Senator-Schwartz-Ring 26 D-59494 Soest Tel.: +49 2921 69-0 www.ceag.de Uninterruptible power supply MASTERGUARD GmbH Postfach 2620 D-91014 Erlangen Fax: +49 9131 6300300 www.masterguard.de Infoline (workdays 9 a.m. to 5 p.m.) Tel.: 0180 5323751 E-mail:
[email protected] Lighting systems Siteco Beleuchtungstechnik GmbH Technical Support Georg-Simon-Ohm-Straße 50 D-83301 Traunreut/Obb. Tel.: +49 8669 33844 Fax: +49 8669 33540 E-mail:
[email protected] www.siteco.de oder www.siteco.com Cables U.I. Lapp GmbH Schulze-Delitzsch-Straße 25 D-70565 Stuttgart Tel.:+49 711 7838-01 www.lapplabel.de 11/17 11 Trademarks ALPHA SELECT®, DIAZED®, DIGSI®, GEAFOL®, instabus® EIB, NEOZED®, NXAIR®, NXPLUS®, S7-300®, S7-400®, SENTRON®, SICAM®, SIGRA®, SIGRES®, SIMATIC®, SIMARIS design®, SIMBOX®, SIMEAS®, SIMOCODE®, SIPLUS®, SIPROTEC®, SIQUENCE®, SIRIUS®, SIVACON®, SolarPark™, PowerCC®, SUNIT™, Totally Integrated Power™, WinAC®, WinCC® are registered trademarks of Siemens AG. ELDACON®, Mirrortec® are registered trademarks of SITECO Beleuchtungstechnik GmbH GeN2™, PULSE™ are registered trademarks of OTIS GmbH. LAPPTHERM®, NEOFLEX®, ÖLFLEX®, SILFLEX®, SPIREX®, UNITRONIC® HITRONIC®, ETHERLINE® are registered trademarks of LAPP Group. Microsoft® und Windows® are registered trademarks of Microsoft Corp., Redmond, Wash., US. NEOPREN® The omission of any specific reference with regard to trademarks, brand names, technical solutions, etc., does not imply that they are not protected by patent. Imprint Totally Integrated Power Application Manual – Part 2: Draft Planning Published by Siemens Aktiengesellschaft Automation and Drives Power Transmission and Distribution Siemens Building Technologies Editor Ralf Willeke, Siemens AG, A&D CD TIP Publishing House Publicis KommunikationsAgentur GmbH, GWA Nägelsbachstr. 33 91052 Erlangen, Germany Print Hofmann Infocom AG Emmericher Straße 10 90411 Nuremberg, Germany Binding THALHOFER, D-71101 Schönaich, Germany ethabind jacket Protected by patent © 2007 Siemens Aktiengesellschaft Berlin and Munich Alle rights reserved. Nominal charge 36 EUR. All data and circuit examples without engagement. Subject to change without prior notice. 11/18 Totally Integrated Power by Siemens www.siemens.com/tip The information provided in this manual contains merely general descriptions or characteristics of performance which in case of actual use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. All product designations may be trademarks or product names of Siemens AG or supplier companies whose use by third parties for their own purposes could violate the rights of the owners. Siemens Aktiengesellschaft Automation and Drives Gleiwitzer Straße 555 90475 NUREMBERG GERMANY Power Transmission and Distribution Freyeslebenstraße 1 91058 ERLANGEN GERMANY Siemens SWITZERLAND AG Building Technologies Group International Headquarters Gubelstrasse 22 6301 ZUG SWITZERLAND Nominal charge: 36 EUR Order No. E20001-A70-M104-V1-7600 Dispo 27612