Siemens SENTRON 3WA1 User manual

3WA1 air circuit breaker
SENTRON
Protection devices
3WA1 air circuit breaker
Equipment Manual
02/2023
92310000002
-06
Introduction
1
Description
2
Applications
3
Accessories
4
Inspection and
maintenance
5
Technical specifications
6
Integration in power
distribution equipment
7
Troubleshooting
8
Disposal
9
Appendix
A
ESD guidelines
B
List of abbreviations
C

Siemens AG
Smart Infrastructure
Electrical Products
Postfach 10 09 53
93009 Regensburg
GERMANY
Ⓟ
02/2023 Subject to change
Copyright © Siemens AG 2020.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to
prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a
safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices
shown below are graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger
will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning
relating to property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the
specific task in accordance with the relevant documentation, in particular its warning notices and safety
instructions. Qualified personnel are those who, based on their training and experience, are capable of
identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant
technical documentation. If products and components from other manufacturers are used, these must be
recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning,
operation and maintenance are required to ensure that the products operate safely and without any
problems. The permissible ambient conditions must be complied with. The information in the relevant
documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of
the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in
subsequent editions.

3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06 3
Table of contents
1 Introduction ........................................................................................................................................ 17
1.1 Scope of validity of this document ............................................................................................... 17
1.2 Target readers of this documentation ......................................................................................... 17
1.3 Technical Support ............................................................................................................................ 17
1.4 Reference documents ..................................................................................................................... 18
1.5 Advanced training courses ............................................................................................................. 18
1.6 Safety instructions ........................................................................................................................... 19
1.6.1 Security information ........................................................................................................................ 20
1.6.2 Open Source Software .................................................................................................................... 20
1.6.3 More information on Open Source software for 3WA circuit breakers................................. 21
1.7 Standards........................................................................................................................................... 22
1.8 Abbreviations .................................................................................................................................... 22
2 Description.......................................................................................................................................... 23
2.1 Overview - applications and portfolio.......................................................................................... 23
2.1.1 Properties........................................................................................................................................... 23
2.1.2 Portfolio of the 3WA1 circuit breaker........................................................................................... 25
2.1.3 Advantages........................................................................................................................................ 26
2.2 Circuit breakers and non-automatic circuit breakers............................................................... 27
2.2.1 Distinction between circuit breakers and non-automatic circuit breakers.......................... 27
2.2.2 Design................................................................................................................................................. 28
2.2.2.1 Circuit breakers ................................................................................................................................ 28
2.2.2.2 Guide frame....................................................................................................................................... 29
2.2.2.3 Secondary disconnect terminals................................................................................................... 34
2.2.3 Circuit breaker identification ......................................................................................................... 36
2.2.3.1 Rating und accessory labels of circuit breaker.......................................................................... 36
2.2.3.2 Guide frame rating label................................................................................................................. 38
2.2.4 Operation ........................................................................................................................................... 39
2.2.4.1 Charging the stored-energy spring............................................................................................... 39
2.2.4.2 Closing and opening ........................................................................................................................ 40
2.2.4.3 Racking the circuit breaker in the guide frame.......................................................................... 42
2.2.4.4 Commissioning checklist ................................................................................................................ 43
2.3 Protection system ............................................................................................................................ 45
2.3.1 General description of function..................................................................................................... 45
2.3.2 Option plug ........................................................................................................................................ 46
2.3.3 Guideline for setting the protection parameters ....................................................................... 48
2.3.4 Time-current characteristic ........................................................................................................... 48
2.3.5 Description of the protective functions ....................................................................................... 50
2.3.5.1 General description.......................................................................................................................... 50
2.3.5.2 Long time LT..................................................................................................................................... 50
2.3.5.3 Short time ST .................................................................................................................................... 54

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2.3.5.4 Instantaneous short-circuit protection INST ..............................................................................55
2.3.5.5 Neutral protection N.........................................................................................................................56
2.3.5.6 Ground-fault alarm...........................................................................................................................57
2.3.5.7 Ground-fault protection GF ............................................................................................................58
2.3.5.8 Ground-fault protection GF Hi-Z...................................................................................................61
2.3.5.9 Directional short time dST..............................................................................................................64
2.3.5.10 Reverse power protection RP.........................................................................................................66
2.3.5.11 Enhanced protective functions EPF..............................................................................................67
2.3.6 Tolerances for protection functions..............................................................................................68
2.3.7 DAS+ maintenance mode...............................................................................................................72
2.3.8 Activation limits and power supply ...............................................................................................76
2.4 ETU300 electronic trip unit .............................................................................................................77
2.4.1 Overview of variants.........................................................................................................................77
2.4.2 Operator controls and displays......................................................................................................78
2.4.2.1 Overview .............................................................................................................................................78
2.4.2.2 Operating keys...................................................................................................................................79
2.4.2.3 LED displays ......................................................................................................................................79
2.4.2.4 Rotary coding switches....................................................................................................................81
2.4.3 Interfaces............................................................................................................................................81
2.4.3.1 Interface for external voltage supply via the TD400..................................................................81
2.4.3.2 Digital input and output...................................................................................................................82
2.4.3.3 External current sensor ...................................................................................................................83
2.4.3.4 Rear interfaces..................................................................................................................................
84
2.4.4 Protection parameters.....................................................................................................................84
2.4.4.1 Introduction........................................................................................................................................84
2.4.4.2 Setting range......................................................................................................................................85
2.4.4.3 Parameter DAS+ maintenance mode...........................................................................................86
2.4.5 DAS+ maintenance mode...............................................................................................................86
2.5 Electronic trip unit ETU600.............................................................................................................87
2.5.1 Overview of variants.........................................................................................................................87
2.5.2 Operator controls, displays and voltage tap module.................................................................88
2.5.2.1 Overview .............................................................................................................................................88
2.5.2.2 Display and operating keys F1 to F4 ............................................................................................89
2.5.2.3 LED displays ......................................................................................................................................89
2.5.2.4 Rotary switch.....................................................................................................................................91
2.5.2.5 Voltage tap module ..........................................................................................................................91
2.5.3 Display and menu structure ...........................................................................................................93
2.5.3.1 Operating philosophy .......................................................................................................................93
2.5.3.2 Menu structure..................................................................................................................................95
2.5.3.3 Start screen........................................................................................................................................96
2.5.3.4 Display after a trip............................................................................................................................99
2.5.3.5 Display in case of a warning.........................................................................................................101
2.5.3.6 Display of an error message.........................................................................................................102
2.5.4 Interfaces..........................................................................................................................................103
2.5.4.1 Bluetooth and USB-C interface...................................................................................................103
2.5.4.2 Digital input and output.................................................................................................................107
2.5.4.3 Digital output for ground-fault alarm REF.................................................................................109
2.5.4.4 External current sensors ...............................................................................................................110
2.5.4.5 Battery...............................................................................................................................................111
2.5.4.6 Rear interfaces................................................................................................................................112
2.5.5 Protection parameters...................................................................................................................113

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2.5.5.1 Introduction ..................................................................................................................................... 113
2.5.5.2 Parameter set A.............................................................................................................................. 113
2.5.5.3 Parameter set B (optional)........................................................................................................... 114
2.5.5.4 Setting range for parameter sets A and B................................................................................. 114
2.5.5.5 Enhanced protective functions EPF........................................................................................... 118
2.5.5.6 Parameter DAS+ maintenance mode........................................................................................ 120
2.5.5.7 Zone-selective interlocking ZSI parameters............................................................................. 120
2.5.6 DAS+ maintenance mode ............................................................................................................ 121
2.5.7 Technical specifications ............................................................................................................... 123
2.5.8 ETU600 commissioning................................................................................................................. 123
2.5.8.1 Grid parameters.............................................................................................................................. 124
2.5.8.2 Wiring configuration....................................................................................................................... 125
2.5.8.3 Metering........................................................................................................................................... 125
2.5.8.4 Local interfaces.............................................................................................................................. 126
2.5.8.5 Display.............................................................................................................................................. 126
2.5.8.6 Digital input ..................................................................................................................................... 126
2.5.8.7 Digital output................................................................................................................................... 126
2.5.8.8 Module monitoring......................................................................................................................... 127
2.5.8.9 Remote access protection............................................................................................................ 127
2.5.8.10 System time..................................................................................................................................... 127
2.6 Function packages......................................................................................................................... 128
2.6.1 General............................................................................................................................................. 128
2.6.2 Ground-fault alarm ........................................................................................................................
128
2.6.3 Directional protective functions.................................................................................................. 128
2.6.4 Enhanced protective functions.................................................................................................... 129
2.6.5 Second set of protection parameters......................................................................................... 129
2.6.6 Metering values.............................................................................................................................. 129
2.7 Metering function (power metering function).......................................................................... 130
2.8 Communication and system connection ................................................................................... 138
2.8.1 CubicleBUS² .................................................................................................................................... 138
2.8.1.1 The bus system............................................................................................................................... 138
2.8.1.2 Technical specifications ............................................................................................................... 140
2.8.1.3 Selecting the power supply .......................................................................................................... 140
2.8.2 Firmware update ............................................................................................................................ 141
2.8.3 COM190 and COM150 communication modules..................................................................... 144
2.8.3.1 Overview........................................................................................................................................... 144
2.8.3.2 COM190 communication module................................................................................................ 145
2.8.3.3 COM150 communication module................................................................................................ 150
2.8.3.4 Common functions and connections.......................................................................................... 154
2.8.3.5 Commissioning................................................................................................................................ 159
2.8.3.6 Access protection functions......................................................................................................... 163
2.8.3.7 Resetting to factory settings........................................................................................................ 167
2.8.3.8 System time..................................................................................................................................... 169
2.8.4 Status acquisition with breaker status sensor BSS200 ......................................................... 171
2.9 Self-monitoring and diagnostics .................................................................................................173
2.9.1 Internal self-test............................................................................................................................. 173
2.9.1.1 General.............................................................................................................................................
173
2.9.1.2 Internal self-test ETU300 ............................................................................................................. 173
2.9.1.3 Internal self-test ETU600 ............................................................................................................. 174
2.9.2 Software-assisted testing ............................................................................................................ 176

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2.9.2.1 Circuit breaker operating principle..............................................................................................176
2.9.2.2 Test functions..................................................................................................................................177
2.9.2.3 SENTRON powerconfig configuration software .......................................................................181
2.9.3 Display of errors and alarms ........................................................................................................181
2.9.4 Trip log ..............................................................................................................................................185
2.10 Zone-selective interlocking ZSI ...................................................................................................187
2.10.1 Advantage.........................................................................................................................................187
2.10.2 Structure and principle of operation of the ZSI system..........................................................187
2.10.3 Monitoring and ZSI test function.................................................................................................189
2.10.4 Parameterization.............................................................................................................................189
2.10.5 Compatibility....................................................................................................................................190
2.10.6 Application examples.....................................................................................................................191
2.10.6.1 Example: radial system with three grading levels....................................................................191
2.10.6.2 Example of multiple infeed with coupler circuit breaker........................................................194
2.10.6.3 Example of branch circuit with fuse............................................................................................195
2.10.6.4 Example of integrating the medium-voltage protection relay ...............................................198
3 Applications...................................................................................................................................... 199
3.1 Use in systems with isolated transformer neutral point (IT systems).................................199
3.1.1 General..............................................................................................................................................199
3.1.2 Selection criteria.............................................................................................................................200
3.1.3 Fault situation..................................................................................................................................201
3.2 Using the 3WA circuit breaker for motor protection................................................................202
3.3 Transfer control...............................................................................................................................206
3.3.1 General..............................................................................................................................................206
3.3.2 Transfer control with two 3WA circuit breakers.......................................................................207
3.3.3 Transfer control with three 3WA circuit breakers....................................................................207
3.3.4 Further information ........................................................................................................................207
3.4 Applications with closing coil and shunt trip ............................................................................208
3.4.1 Overview ...........................................................................................................................................208
3.4.2 Connecting the closing coil...........................................................................................................210
3.4.3 Connection of the first shunt trip ................................................................................................211
3.4.4 Connection of the second shunt trip ..........................................................................................212
3.4.5 Electrical interlocks for switching via communication............................................................212
3.4.6 Electrical closing interlock ............................................................................................................215
3.5 DSP800 display ...............................................................................................................................216
3.6 powermanager.................................................................................................................................219
3.6.1 Energy management in accordance with ISO 50001...............................................................219
3.6.2 Features............................................................................................................................................220
3.6.3 Functions..........................................................................................................................................221
3.6.4 TÜV certificate of conformity for energy management...........................................................221
3.7 7KN Powercenter 3000..................................................................................................................222
3.7.1 IoT gateway for the intelligent power distribution equipment ..............................................222
3.7.2 IoT data platform ............................................................................................................................223
3.7.3 Parameterization and settings.....................................................................................................224
3.8 SENTRON powermind....................................................................................................................225

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4 Accessories....................................................................................................................................... 227
4.1 Overview........................................................................................................................................... 227
4.2 Preparatory and concluding installation steps for the installation of internal
accessories...................................................................................................................................... 229
4.3 Control and signaling accessories.............................................................................................. 234
4.3.1 Closing coil, shunt trip, undervoltage release .......................................................................... 234
4.3.1.1 Description ...................................................................................................................................... 234
4.3.1.2 Technical specifications ............................................................................................................... 237
4.3.1.3 Part number..................................................................................................................................... 241
4.3.2 Capacitor trip device for shunt trips........................................................................................... 243
4.3.2.1 Description ...................................................................................................................................... 243
4.3.2.2 Technical specifications ............................................................................................................... 243
4.3.2.3 Article number................................................................................................................................. 243
4.3.3 Remote trip alarm reset coil (incl. automatic reset of the reclosing lockout) ................... 244
4.3.3.1 Description ...................................................................................................................................... 244
4.3.3.2 Technical specifications of the remote trip alarm reset coil................................................. 245
4.3.3.3 Article number................................................................................................................................. 245
4.3.4 Emergency OPEN button.............................................................................................................. 246
4.3.4.1 Description ...................................................................................................................................... 246
4.3.4.2 Article number................................................................................................................................. 246
4.3.5 Digital input/output modules....................................................................................................... 246
4.3.5.1 Description ...................................................................................................................................... 246
4.3.5.2 Technical specifications ............................................................................................................... 252
4.3.5.3 Article number.................................................................................................................................
256
4.3.6 Spring charging motor................................................................................................................... 257
4.3.6.1 Description ...................................................................................................................................... 257
4.3.6.2 Technical specifications ............................................................................................................... 258
4.3.6.3 Article number................................................................................................................................. 258
4.3.7 Motor disconnect switch .............................................................................................................. 259
4.3.7.1 Description ...................................................................................................................................... 259
4.3.7.2 Article number................................................................................................................................. 259
4.3.8 Mechanical operating cycles counter ........................................................................................ 260
4.3.8.1 Description ...................................................................................................................................... 260
4.3.8.2 Article number................................................................................................................................. 260
4.3.9 External Trip Controller ETC600 .................................................................................................261
4.3.9.1 Description ...................................................................................................................................... 261
4.3.9.2 Technical specifications and connection.................................................................................. 262
4.3.9.3 Article number................................................................................................................................. 264
4.3.10 Second tripping solenoid with reclosing lockout ..................................................................... 265
4.3.10.1 Description ...................................................................................................................................... 265
4.3.10.2 Article number................................................................................................................................. 265
4.4 Accessory auxiliary switches and signaling switches............................................................. 266
4.4.1 Overview........................................................................................................................................... 266
4.4.2 Auxiliary switches S1 to S8 .......................................................................................................... 266
4.4.2.1 Description ...................................................................................................................................... 266
4.4.2.2 Technical specifications ............................................................................................................... 267
4.4.2.3 Article number................................................................................................................................. 268
4.4.3 Ready-to-close signaling switch................................................................................................. 268
4.4.3.1 Description ...................................................................................................................................... 268
4.4.3.2 Technical specifications ............................................................................................................... 269

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4.4.3.3 Article number .................................................................................................................................269
4.4.4 Spring charge signaling switch ....................................................................................................270
4.4.4.1 Description.......................................................................................................................................270
4.4.4.2 Technical specifications................................................................................................................271
4.4.4.3 Article number .................................................................................................................................271
4.4.5 Trip alarm switch ............................................................................................................................272
4.4.5.1 Description.......................................................................................................................................272
4.4.5.2 Technical specifications................................................................................................................273
4.4.5.3 Part number.....................................................................................................................................273
4.4.6 Position signaling switch module for guide frame...................................................................274
4.4.6.1 Description.......................................................................................................................................274
4.4.6.2 Technical specifications................................................................................................................278
4.4.6.3 Article number .................................................................................................................................279
4.5 Accessories for main connections...............................................................................................280
4.5.1 Main connections for fixed-mounted circuit breakers............................................................280
4.5.1.1 Description.......................................................................................................................................280
4.5.1.2 Technical specifications................................................................................................................285
4.5.1.3 Article number .................................................................................................................................286
4.5.2 Main connections for withdrawable circuit breakers..............................................................288
4.5.2.1 Description.......................................................................................................................................288
4.5.2.2 Technical specifications................................................................................................................295
4.5.2.3 Part number.....................................................................................................................................295
4.6 Accessories for secondary disconnect terminals.....................................................................298
4.6.1 Secondary disconnect terminals for fixed-mounted circuit breakers..................................298
4.6.1.1 Description.......................................................................................................................................298
4.6.1.2 Connection .......................................................................................................................................298
4.6.1.3 Part number.....................................................................................................................................299
4.6.2 Secondary disconnect terminals for withdrawable circuit breakers....................................299
4.6.2.1 Description.......................................................................................................................................299
4.6.2.2 Connection .......................................................................................................................................300
4.6.2.3 Part number.....................................................................................................................................300
4.7 Conversion kit for withdrawable circuit breakers and rating coding of the guide
frame .................................................................................................................................................301
4.7.1 Conversion kit for converting fixed-mounted circuit breakers/non-automatic circuit
breakers into withdrawable circuit breakers.............................................................................301
4.7.1.1 Description.......................................................................................................................................301
4.7.1.2 Technical specifications................................................................................................................302
4.7.1.3 Part number.....................................................................................................................................302
4.7.2 Equipment-dependent coding......................................................................................................303
4.7.2.1 Description.......................................................................................................................................303
4.7.2.2 Article number .................................................................................................................................303
4.8 Accessories for protection against unauthorized operation ..................................................304
4.8.1 Overview of locking devices and locking provisions................................................................304
4.8.2 Locking provision to prevent unauthorized closing - Safe Open..........................................307
4.8.2.1 Description.......................................................................................................................................307
4.8.2.2 Activation..........................................................................................................................................308
4.8.2.3 Part number.....................................................................................................................................309
4.8.3 Local electric close.........................................................................................................................310
4.8.3.1 Description.......................................................................................................................................310
4.8.3.2 Connection .......................................................................................................................................311

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4.8.3.3 Activation ......................................................................................................................................... 311
4.8.3.4 Part number..................................................................................................................................... 311
4.8.4 Locking provision for charging handle for padlocks ............................................................... 312
4.8.4.1 Description ...................................................................................................................................... 312
4.8.4.2 Activation ......................................................................................................................................... 312
4.8.4.3 Article number................................................................................................................................. 312
4.8.5 Cover for the electronic trip unit ................................................................................................. 313
4.8.5.1 Description ...................................................................................................................................... 313
4.8.5.2 Article number................................................................................................................................. 313
4.8.6 Locking provision to prevent unauthorized closing of the withdrawable circuit
breaker ............................................................................................................................................. 314
4.8.6.1 Description ...................................................................................................................................... 314
4.8.6.2 Activation ......................................................................................................................................... 315
4.8.6.3 Part number..................................................................................................................................... 315
4.8.7 Locking provision with padlock for the racking handle of the racking mechanism.......... 316
4.8.7.1 Description ...................................................................................................................................... 316
4.8.7.2 Activation ......................................................................................................................................... 316
4.8.8 Locking provision with safety lock for the racking handle..................................................... 317
4.8.8.1 Description ...................................................................................................................................... 317
4.8.8.2 Activation ......................................................................................................................................... 317
4.8.8.3 Part number..................................................................................................................................... 318
4.8.9 Shutters............................................................................................................................................ 319
4.8.9.1 Article number................................................................................................................................. 319
4.8.10 Locking provision to prevent opening of the control cabinet door when the circuit
breaker is closed ............................................................................................................................
320
4.8.10.1 Description ...................................................................................................................................... 320
4.8.10.2 Activation / override ...................................................................................................................... 321
4.8.10.3 Article number................................................................................................................................. 321
4.8.11 Locking provision to prevent racking of the withdrawable circuit breaker in the
disconnected position ................................................................................................................... 322
4.8.11.1 Description ...................................................................................................................................... 322
4.8.11.2 Activation ......................................................................................................................................... 323
4.8.11.3 Part number..................................................................................................................................... 323
4.8.12 Locking provision to prevent racking of the withdrawable circuit breaker when the
control cabinet door is open ........................................................................................................ 324
4.8.12.1 Description ...................................................................................................................................... 324
4.8.12.2 Activation ......................................................................................................................................... 324
4.8.12.3 Article number................................................................................................................................. 325
4.8.13 Locking provision to prevent closing of the withdrawable circuit breaker when the
control cabinet door is open ........................................................................................................ 325
4.8.13.1 Description ...................................................................................................................................... 325
4.8.13.2 Activation / override ...................................................................................................................... 326
4.8.13.3 Part number..................................................................................................................................... 326
4.9 Interlocking...................................................................................................................................... 327
4.9.1 Mechanical interlocking (Bowden cable interlocking) ........................................................... 327
4.9.1.1 Description ...................................................................................................................................... 327
4.9.1.2 Part number..................................................................................................................................... 331
4.9.2 Interlocking of two circuit breakers using a Bowden cable................................................... 332
4.9.3 Interlocking of three circuit breakers (one of three) using a Bowden cable ..................... 333
4.9.4 Interlocking of three circuit breakers using a Bowden cable................................................ 334
4.9.5 Interlocking of three circuit breakers, two of which are interlocked, using a Bowden
cable.................................................................................................................................................. 335

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4.9.6 Interlocking of three circuit breakers using a Bowden cable ................................................336
4.9.7 Interlock for mechanical close/open ..........................................................................................337
4.9.7.1 Description.......................................................................................................................................337
4.9.7.2 Activation..........................................................................................................................................338
4.9.7.3 Article number .................................................................................................................................338
4.9.8 Interlock system to prevent unauthorized closing ...................................................................339
4.9.8.1 Description.......................................................................................................................................339
4.9.8.2 Activation..........................................................................................................................................339
4.9.8.3 Article number .................................................................................................................................339
4.10 Accessories for integration in the power distribution equipment.........................................340
4.10.1 Door sealing frame .........................................................................................................................340
4.10.1.1 Description.......................................................................................................................................340
4.10.1.2 Article number .................................................................................................................................340
4.10.2 IP55 protective cover .....................................................................................................................341
4.10.2.1 Description.......................................................................................................................................341
4.10.2.2 Article number .................................................................................................................................342
4.10.3 Arc chute cover................................................................................................................................343
4.10.3.1 Description.......................................................................................................................................343
4.10.3.2 Article number .................................................................................................................................343
4.10.4 Grounding connection between the guide frame and the circuit breaker ..........................344
4.10.4.1 Description.......................................................................................................................................344
4.10.4.2 Article number .................................................................................................................................345
4.10.5 Support brackets.............................................................................................................................346
4.10.5.1 Description.......................................................................................................................................346
4.10.5.2 Article number .................................................................................................................................346
4.11 Accessories for the ETU300 and ETU600 electronic trip units .............................................347
4.11.1 Option plug.......................................................................................................................................347
4.11.1.1 Description.......................................................................................................................................347
4.11.1.2 Article number .................................................................................................................................348
4.11.2 External current sensor for neutral pole ....................................................................................349
4.11.2.1 Description.......................................................................................................................................349
4.11.2.2 Technical specifications................................................................................................................349
4.11.2.3 Article number .................................................................................................................................350
4.11.3 Voltage tap module VTM for ETU600.........................................................................................351
4.11.3.1 Description.......................................................................................................................................351
4.11.3.2 Article number .................................................................................................................................352
4.11.4 Adapter for the activation of the ETU300..................................................................................353
4.11.4.1 Description.......................................................................................................................................353
4.11.4.2 Connection .......................................................................................................................................353
4.11.4.3 Article number .................................................................................................................................354
4.11.5 Internal current sensors without energy cores.........................................................................355
4.11.5.1 Description.......................................................................................................................................355
4.11.5.2 Technical specifications................................................................................................................356
4.11.5.3 Connection .......................................................................................................................................356
4.11.5.4 Article numbers ...............................................................................................................................357
4.11.6 Ready4COM thanks to BSS200 Breaker Status Sensor for ETU600....................................358
4.11.6.1 Description.......................................................................................................................................358
4.11.6.2 Technical specifications................................................................................................................359
4.11.6.3 Article number .................................................................................................................................359
4.11.7 ZSI200 zone selective interlocking module ...............................................................................360
4.11.7.1 Description.......................................................................................................................................360

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4.11.7.2 Technical specifications ............................................................................................................... 361
4.11.7.3 Article number................................................................................................................................. 362
4.11.8 Replacement battery for ETU600................................................................................................ 363
4.11.8.1 Description ...................................................................................................................................... 363
4.11.8.2 Replacing the battery .................................................................................................................... 363
4.11.8.3 Article number................................................................................................................................. 363
4.12 Internal voltage tap on main current paths............................................................................... 364
4.12.1 Voltage tap conversion.................................................................................................................. 364
4.12.1.1 Description ...................................................................................................................................... 364
4.12.1.2 Article number................................................................................................................................. 364
4.12.2 Retrofit of the internal voltage tap ............................................................................................. 366
4.12.2.1 Description ...................................................................................................................................... 366
4.12.2.2 Article number................................................................................................................................. 367
4.13 Connection of an external voltage transformer ....................................................................... 368
4.13.1 Description ...................................................................................................................................... 368
4.13.2 Connection....................................................................................................................................... 369
4.13.3 Article number................................................................................................................................. 370
4.14 Function packages for the ETU600 electronic trip unit.......................................................... 371
4.14.1 Description ...................................................................................................................................... 371
4.14.2 Function packages for protection and alarm functions.......................................................... 371
4.14.2.1 Description ...................................................................................................................................... 371
4.14.2.2 Article number................................................................................................................................. 372
4.14.3 Function packages for enhanced protective functions EPF.................................................. 372
4.14.3.1 Description ...................................................................................................................................... 372
4.14.3.2 Article number................................................................................................................................. 373
4.14.4 Function packages for function extensions.............................................................................. 373
4.14.4.1 Description ...................................................................................................................................... 373
4.14.4.2 Article number................................................................................................................................. 373
4.14.5 Function packages for metering values..................................................................................... 374
4.14.5.1 Description ...................................................................................................................................... 374
4.14.5.2 Article number................................................................................................................................. 375
4.15 Communication interface ............................................................................................................. 376
4.15.1 PROFINET IO/Modbus TCP module COM190 ......................................................................... 376
4.15.1.1 Description ...................................................................................................................................... 376
4.15.1.2 Technical specifications ............................................................................................................... 377
4.15.1.3 Article number................................................................................................................................. 378
4.15.2 Modbus RTU module COM150.................................................................................................... 379
4.15.2.1 Description ...................................................................................................................................... 379
4.15.2.2 Technical specifications ............................................................................................................... 380
4.15.2.3 Article number................................................................................................................................. 381
4.15.3 Position signaling switch module for connection to the communication module............. 382
4.15.3.1 Description ...................................................................................................................................... 382
4.15.3.2 Article number................................................................................................................................. 382
4.15.4 CubicleBUS² terminating resistor ............................................................................................... 383
4.15.4.1 Description ...................................................................................................................................... 383
4.15.4.2 Technical specifications ............................................................................................................... 383
4.15.4.3 Article number.................................................................................................................................
383
4.15.5 Mounting adapter for CubicleBUS² modules............................................................................ 384
4.15.5.1 Description ...................................................................................................................................... 384
4.15.5.2 Article number................................................................................................................................. 384

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12 Equipment Manual, 02/2023, 92310000002-06
4.16 Special packaging...........................................................................................................................385
4.16.1 Description.......................................................................................................................................385
4.16.2 Article number .................................................................................................................................385
5 Inspection and maintenance ........................................................................................................... 387
5.1 General..............................................................................................................................................387
5.2 Safety regulations...........................................................................................................................389
5.3 Planning of inspection and maintenance...................................................................................390
5.3.1 Inspection interval ..........................................................................................................................390
5.3.2 Scope.................................................................................................................................................391
5.3.3 Logging..............................................................................................................................................393
5.4 Performing inspection....................................................................................................................394
5.4.1 General..............................................................................................................................................394
5.4.2 Visual inspection.............................................................................................................................394
5.4.3 Check of the available documentation and of the rating/accessory label..........................395
5.4.4 Testing of mechanical function of the circuit breaker ............................................................395
5.4.5 Testing of mechanical function of the withdrawable circuit breaker and the guide
frame .................................................................................................................................................396
5.4.6 Testing of auxiliary circuits and of cables to external current sensors...............................396
5.4.7 Testing of mechanical and electrical function of internal accessories...............................397
5.4.8 Testing of settings and inspection of electronic trip unit.......................................................398
5.4.9 Inspection of the arc chutes, arc chute cover and the contact system...............................398
5.4.10 Testing of the function of the CubicleBUS² modules..............................................................399
5.5 Preparing for maintenance work .................................................................................................400
5.6 Maintaining the arc chutes...........................................................................................................403
5.7 Maintaining the main contacts ....................................................................................................405
5.7.1 Introduction......................................................................................................................................405
5.7.2 Maintaining the main contacts and replacing the contact system.......................................406
5.7.3 Article number .................................................................................................................................414
5.8 Decommissioning............................................................................................................................416
6 Technical specifications.................................................................................................................. 417
6.1 Circuit diagrams ..............................................................................................................................417
6.1.1 Secondary disconnect terminal blocks X5 to X9 and their terminal markings...................417
6.1.2 Terminal connection diagrams of secondary disconnect terminal.......................................418
6.1.2.1 ETU300 terminal assignment diagram.......................................................................................418
6.1.2.2 ETU600 terminal assignment diagram.......................................................................................419
6.1.2.3 Terminal assignment plan supplement for circuit breakers with the K60 option
(with integrated undervoltage release)......................................................................................421
6.1.3 Closing coil CC / CC-COM............................................................................................................422
6.1.4 Remote trip alarm reset coil RR...................................................................................................422
6.1.5 Shunt trip ST / ST-COM / ST2 ....................................................................................................422
6.1.6 Capacitor trip device for shunt trips ...........................................................................................423
6.1.7 Undervoltage release UVR / UVR-t ............................................................................................423
6.1.8 Second tripping solenoid F6 with reclosing lockout................................................................424
6.1.9 External Trip Controller ETC600..................................................................................................424
6.1.10 Digital input / output module IOM230 .......................................................................................425
6.1.11 Digital input/output module IOM350..........................................................................................425
6.1.12 Spring charging motor....................................................................................................................426

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Equipment Manual, 02/2023, 92310000002-06 13
6.1.13 Motor disconnect switch .............................................................................................................. 426
6.1.14 Auxiliary switch............................................................................................................................... 426
6.1.15 Ready-to-close signaling switch S20......................................................................................... 427
6.1.16 Spring charge signaling switch S21............................................................................................ 427
6.1.17 Trip alarm switches S24 and S25 ............................................................................................... 427
6.1.18 PSS and PSS COM position signaling switch modules.......................................................... 428
6.1.19 Local electric close S10 ................................................................................................................ 429
6.1.20 ZSI200 zone selective interlocking module............................................................................... 430
6.1.21 COM150 communication module................................................................................................ 430
6.1.22 COM190 communication module................................................................................................ 431
6.1.23 Breaker Status Sensor BSS200................................................................................................... 431
6.2 Dimension drawings ...................................................................................................................... 432
6.2.1 3WA1 - size 1 .................................................................................................................................. 432
6.2.1.1 Fixed-mounted circuit breakers.................................................................................................. 432
6.2.1.2 Withdrawable circuit breakers..................................................................................................... 438
6.2.2 3WA1 - size 2 .................................................................................................................................. 446
6.2.2.1 Fixed-mounted circuit breakers.................................................................................................. 446
6.2.2.2 Withdrawable circuit breakers..................................................................................................... 453
6.2.3 3WA1 - size 3 .................................................................................................................................. 463
6.2.3.1 Fixed-mounted circuit breakers.................................................................................................. 463
6.2.3.2 Withdrawable circuit breakers..................................................................................................... 468
6.2.4 Safety clearances...........................................................................................................................
475
6.2.4.1 3WA - size 1..................................................................................................................................... 475
6.2.4.2 3WA - size 2..................................................................................................................................... 477
6.2.4.3 3WA - size 3..................................................................................................................................... 479
6.2.5 Accessories and door cutouts ..................................................................................................... 481
6.2.5.1 Capacitor storage device .............................................................................................................. 481
6.2.5.2 COM190 communication module................................................................................................ 481
6.2.5.3 External current sensor for the neutral pole (N-CT)............................................................... 482
6.2.5.4 Support brackets............................................................................................................................ 484
6.2.5.5 Door cutout/protective cover IP55 ............................................................................................. 485
6.2.5.6 Door sealing frame......................................................................................................................... 486
6.2.5.7 Interlocks and locking provisions................................................................................................ 487
6.3 Technical specifications of 3WA circuit breakers ................................................................... 489
6.3.1 Basic data for sizes 1 to 3 ............................................................................................................ 489
6.3.2 Size 1................................................................................................................................................. 490
6.3.2.1 Basic data........................................................................................................................................ 490
6.3.2.2 Breaking capacity........................................................................................................................... 491
6.3.2.3 Ampacity, power loss..................................................................................................................... 492
6.3.2.4 Switching times, endurance (operating cycles)....................................................................... 492
6.3.2.5 Minimum cross-sections of main conductors.......................................................................... 494
6.3.3 Size 2................................................................................................................................................. 495
6.3.3.1 Basic data........................................................................................................................................ 495
6.3.3.2 Breaking capacity for AC.............................................................................................................. 496
6.3.3.3 Ampacity, power loss for AC........................................................................................................ 497
6.3.3.4 Switching times, endurance (operating cycles) for AC .......................................................... 497
6.3.3.5 Minimum cross-sections of main conductors for AC.............................................................. 498
6.3.3.6 Breaking capacity for DC.............................................................................................................. 499
6.3.3.7 Ampacity, power loss for DC........................................................................................................ 500
6.3.3.8 Switching times, endurance (operating cycles) for DC.......................................................... 500
6.3.3.9 Minimum cross-sections of main conductors for DC............................................................. 502

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14 Equipment Manual, 02/2023, 92310000002-06
6.3.4 Size 3 .................................................................................................................................................502
6.3.4.1 Basic data.........................................................................................................................................502
6.3.4.2 Breaking capacity ...........................................................................................................................503
6.3.4.3 Ampacity, power loss .....................................................................................................................504
6.3.4.4 Switching times, endurance (operating cycles) .......................................................................504
6.3.4.5 Minimum cross-sections of main conductors...........................................................................506
6.3.5 Connection options for auxiliary conductor plug-in system...................................................506
6.4 Ambient conditions.........................................................................................................................507
6.5 Installation altitudes.......................................................................................................................508
6.6 Standards .........................................................................................................................................508
6.7 Approvals..........................................................................................................................................509
6.8 Failure probability acc. to B10 and B10d...................................................................................510
6.9 Electromagnetic compatibility......................................................................................................514
7 Integration in power distribution equipment ................................................................................. 515
7.1 Compact design...............................................................................................................................515
7.2 Influencing factors..........................................................................................................................516
7.3 Derating in the power distribution equipment..........................................................................517
7.3.1 Overview ...........................................................................................................................................517
7.3.2 Derating 3WA11 ..............................................................................................................................517
7.3.3 Derating 3WA12 ..............................................................................................................................522
7.3.4 Derating 3WA13 ..............................................................................................................................524
7.4 Requirement according to IEC 61439 .........................................................................................526
7.4.1 Standard IEC 61439........................................................................................................................526
7.4.2 Simplified integration.....................................................................................................................527
7.4.2.1 Structural integration in power distribution equipment..........................................................527
7.4.2.2 Using 3WA circuit breakers in 3WL guide frames....................................................................528
7.4.2.3 Retrofit: Simple replaceability in existing power distribution equipment ...........................529
7.4.2.4 Checklist for replacing 3WL with 3WA circuit breaker according to IEC 61439-2 ............535
7.5 Phase barriers and horizontal partitions....................................................................................537
7.6 Insulation test of the power distribution equipment ...............................................................539
7.7 Main connection..............................................................................................................................540
8 Troubleshooting ............................................................................................................................... 541
8.1 Troubleshooting for circuit breaker.............................................................................................541
8.2 Troubleshooting for the ETU600 electronic trip unit...............................................................543
8.3 Troubleshooting for COM150 / COM 190 communications module....................................547
9 Disposal ............................................................................................................................................ 549
9.1 End of maximum service life ........................................................................................................549
9.2 Disposal of low-voltage circuit breakers....................................................................................549
9.3 Disposal of waste electronic equipment....................................................................................549

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Equipment Manual, 02/2023, 92310000002-06 15
A Appendix ........................................................................................................................................... 551
A.1 Basic settings of the electronic trip unit on delivery .............................................................. 551
A.2 Time-current characteristic of the ETU300 electronic trip unit ........................................... 557
A.3 Time-current characteristic of the ETU600 electronic trip unit ........................................... 558
A.4 ETU600 menu structure................................................................................................................ 559
A.5 Device numbers according to IEEE standard C37.2................................................................ 562
A.6 ZSI system over seven grading levels........................................................................................ 564
A.7 Overview of possible coding variants......................................................................................... 565
B ESD guidelines ................................................................................................................................. 567
B.1 Electrostatic sensitive devices (ESD) ........................................................................................ 567
C List of abbreviations ........................................................................................................................ 569

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3WA1 air circuit breaker
16 Equipment Manual, 02/2023, 92310000002-06

3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06 17
Introduction
1
1.1 Scope of validity of this document
This equipment manual is a reference manual for technical information that users will
need to configure, connect, and operate the 3WA air circuit breakers and their
accessories.
1.2 Target readers of this documentation
The information contained in this manual is provided for the benefit of:
•Planners
•Power distribution equipment manufacturers/builders
•Commissioning engineers
•Users
•Maintenance personnel
1.3 Technical Support
You can find further support on the Internet at:
TechnicalSupport (https://www.siemens.com/support-request)

Introduction
1.4 Reference documents
3WA1 air circuit breaker
18 Equipment Manual, 02/2023, 92310000002-06
1.4 Reference documents
For more information, refer to the following documents:
Title
Article number
3WA Air Circuit Breaker Communication
System Manual
(https://support.industry.siemens.com/cs/ww/en/view/109792368)
3WA Air Circuit Breakers
Catalog
(https://support.industry.siemens.com/cs/ww/en/view/109781806)
E86060-K8280-E401
Catalog LV 10 - Low-Voltage Power Distribution and Electrical
Installation Technology
Catalog
(https://support.industry.siemens.com/cs/ww/en/view/109482234)
E86060-K8280-A101
GSDML file
(https://support.industry.siemens.com/cs/WW/en/view/109793939)
for the COM190 communication module of the 3WA air circuit breaker
Modbus register
(https://support.industry.siemens.com/cs/de/en/view/109794278)
for the COM150 and COM190 communication modules of the 3WA air
circuit breaker
3KC ATC3100 Transfer Control Devices
Manual
(https://support.industry.siemens.com/cs/ww/en/view/100341671)
3KC ATC6300 Transfer Control Devices
Manual
(https://support.industry.siemens.com/cs/ww/en/view/109755149)
3KC ATC6500 Transfer Control Devices
Manual
(https://support.industry.siemens.com/cs/ww/en/view/109758018)
7KN Powercenter 3000
Manual
(https://support.industry.siemens.com/cs/ww/en/view/109763838)
Hartmut Kiank, Wolfgang Fruth:
Planning Guide for Power Distribution Plants, Publicis Publishing
ISBN-10: 3895783595
Schalten, Schützen, Verteilen in Niederspannungsnetzen (Switching,
Protection and Distribution in Low-Voltage Networks), substantially
extended and revised edition 1997
ISBN-10 3895780413
1.5 Advanced training courses
Find out about training courses on offer on the following link.
Training for Industry (https://www.siemens.com/sitrain-lowvoltage)
Here you can choose from:
•Web-based training courses (online, informative, free)
•Classroom training courses (course attendance, comprehensive, subject to fee)
You also have the possibility of compiling your own training portfolio via Learning paths.