Siemens SENTRON 3WA Air User manual

3WA Air Circuit Breakers
SENTRON
Protection devices
3WA Air Circuit Breakers
Equipment Manual
05/2021
92310000002-03
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
Ⓟ05/2021 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.

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Equipment Manual, 05/2021, 92310000002-03 3
Table of contents
1 Introduction ......................................................................................................................................... 15
1.1 Scope of validity of this document...................................................................................... 15
1.2 Target readers of this documentation................................................................................. 15
1.3 Technical Support .............................................................................................................. 15
1.4 Reference documents ........................................................................................................ 16
1.5 Advanced training courses ................................................................................................. 16
1.6 Safety instructions ............................................................................................................. 17
1.6.1 Security information .......................................................................................................... 18
1.6.2 Open Source Software ....................................................................................................... 18
1.6.3 More information on Open Source software for 3WA circuit breakers.................................. 19
1.7 Standards .......................................................................................................................... 20
2 Description........................................................................................................................................... 21
2.1 Overview - applications and portfolio ................................................................................. 21
2.1.1 Properties .......................................................................................................................... 21
2.1.2 Portfolio of the 3WA1 circuit breaker.................................................................................. 23
2.1.3 Advantages........................................................................................................................ 23
2.1.4 Applications....................................................................................................................... 24
2.2 Circuit breakers and non-automatic circuit breakers............................................................ 26
2.2.1 Distinction between circuit breakers and non-automatic circuit breakers............................. 26
2.2.2 Design............................................................................................................................... 27
2.2.2.1 Circuit breakers.................................................................................................................. 27
2.2.2.2 Guide frame....................................................................................................................... 28
2.2.2.3 Secondary disconnect terminals......................................................................................... 33
2.2.3 Circuit breaker identification .............................................................................................. 35
2.2.3.1 Rating and accessory labels ................................................................................................ 35
2.2.3.2 Guide frame rating label..................................................................................................... 37
2.2.4 Operation.......................................................................................................................... 38
2.2.4.1 Charging the stored-energy spring ..................................................................................... 38
2.2.4.2 Closing and opening .......................................................................................................... 39
2.2.4.3 Racking the circuit breaker in the guide frame .................................................................... 41
2.2.4.4 Commissioning checklist.................................................................................................... 43
2.3 Protection system .............................................................................................................. 44
2.3.1 General description of function.......................................................................................... 44
2.3.2 Option plug ....................................................................................................................... 45
2.3.3 Guideline for setting the protection parameters.................................................................. 47
2.3.4 Time-current characteristic................................................................................................. 47
2.3.5 Description of the protective functions............................................................................... 48
2.3.5.1 General description............................................................................................................ 48
2.3.5.2 Long time LT...................................................................................................................... 49
2.3.5.3 Short time ST..................................................................................................................... 51
2.3.5.4 Instantaneous short-circuit protection INST ........................................................................ 52

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2.3.5.5 Neutral protection N.......................................................................................................... 53
2.3.5.6 Ground-fault alarm ............................................................................................................ 54
2.3.5.7 Ground-fault protection GF................................................................................................ 55
2.3.5.8 Ground-fault protection GF Hi-Z......................................................................................... 58
2.3.5.9 Directional short time dST.................................................................................................. 60
2.3.5.10 Reverse power protection RP.............................................................................................. 62
2.3.5.11 Enhanced protective functions EPF..................................................................................... 63
2.3.6 DAS+ maintenance mode................................................................................................... 64
2.3.7 Activation limits and power supply..................................................................................... 68
2.4 Electronic trip unit ETU600 ................................................................................................ 69
2.4.1 Overview of variants.......................................................................................................... 69
2.4.2 Operator controls, displays and voltage tap module............................................................ 70
2.4.2.1 Overview........................................................................................................................... 70
2.4.2.2 Display and operating keys F1 to F4 ................................................................................... 71
2.4.2.3 LED displays....................................................................................................................... 71
2.4.2.4 Rotary switch..................................................................................................................... 73
2.4.2.5 Voltage tap module ........................................................................................................... 74
2.4.3 Display and menu structure ............................................................................................... 76
2.4.3.1 Operating philosophy ........................................................................................................ 76
2.4.3.2 Menu structure.................................................................................................................. 78
2.4.3.3 Start screen ....................................................................................................................... 79
2.4.3.4 Display after a trip.............................................................................................................. 82
2.4.3.5 Display in case of a warning ............................................................................................... 84
2.4.3.6 Display of an error message ............................................................................................... 85
2.4.4 Interfaces .......................................................................................................................... 86
2.4.4.1 Bluetooth and USB-C interface ........................................................................................... 86
2.4.4.2 Digital input and output..................................................................................................... 89
2.4.4.3 Digital output for ground-fault alarm REF ........................................................................... 90
2.4.4.4 External current sensors..................................................................................................... 90
2.4.4.5 Battery .............................................................................................................................. 91
2.4.4.6 Rear interfaces................................................................................................................... 92
2.4.5 Protection parameters........................................................................................................ 93
2.4.5.1 Parameter sets A and B ...................................................................................................... 93
2.4.5.2 Enhanced protective functions EPF parameters................................................................... 97
2.4.5.3 Parameter DAS+ maintenance mode .................................................................................. 98
2.4.6 DAS+ maintenance mode................................................................................................... 99
2.5 Function packages........................................................................................................... 102
2.6 Metering function (power metering function) .................................................................. 103
2.7 Communication and system connection........................................................................... 106
2.7.1 CubicleBUS²..................................................................................................................... 106
2.7.1.1 The bus system................................................................................................................ 106
2.7.1.2 Technical specifications ................................................................................................... 108
2.7.2 COM190 communication module..................................................................................... 109
2.7.2.1 Overview......................................................................................................................... 109
2.7.2.2 X61 connector................................................................................................................. 110
2.7.2.3 X62 connector................................................................................................................. 110
2.7.2.4 Adapter and temperature sensor...................................................................................... 112
2.7.2.5 Ethernet ports X63 / X64.................................................................................................. 113
2.7.2.6 MAC addresses ................................................................................................................ 113
2.7.2.7 LEDs ................................................................................................................................ 114

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2.7.2.8 Operator controls............................................................................................................. 116
2.7.2.9 Commissioning................................................................................................................ 118
2.7.2.10 Access protection functions.............................................................................................. 122
2.7.2.11 Resetting to factory settings............................................................................................. 126
2.7.2.12 System time..................................................................................................................... 127
2.7.3 Status acquisition with breaker status sensor BSS200 ....................................................... 129
2.8 Self-monitoring and diagnostics....................................................................................... 130
2.8.1 Internal self-test............................................................................................................... 130
2.8.1.1 General............................................................................................................................ 130
2.8.1.2 Internal self-test ETU600.................................................................................................. 131
2.8.2 Error display..................................................................................................................... 133
2.8.3 Trip log............................................................................................................................ 135
3 Applications ....................................................................................................................................... 137
3.1 Use in systems with isolated transformer neutral point (IT systems).................................. 137
3.1.1 General............................................................................................................................ 137
3.1.2 Selection criteria.............................................................................................................. 138
3.1.3 Fault situation.................................................................................................................. 139
3.2 Transfer control ............................................................................................................... 140
3.2.1 General............................................................................................................................ 140
3.2.2 Application areas ............................................................................................................. 141
3.2.3 Transfer control with two 3WA circuit breakers................................................................. 141
3.2.4 Transfer control with three 3WA circuit breakers............................................................... 141
3.2.5 Further information ......................................................................................................... 142
3.3 powermanager ................................................................................................................ 143
3.3.1 Energy management in accordance with ISO 50001......................................................... 143
3.3.2 Features .......................................................................................................................... 144
3.3.3 Functions......................................................................................................................... 145
3.3.4 TÜV certificate of conformity for energy management...................................................... 145
3.4 7KN Powercenter 3000.................................................................................................... 146
3.4.1 IoT gateway for the intelligent power distribution equipment........................................... 146
3.4.2 IoT data platform ............................................................................................................. 147
3.4.3 Parameterization and settings .......................................................................................... 147
4 Accessories ........................................................................................................................................ 149
4.1 Overview......................................................................................................................... 149
4.2 Preparatory and concluding installation steps for the installation of internal accessories.... 151
4.3 Control and signaling accessories..................................................................................... 156
4.3.1 Closing coil, shunt trip, undervoltage release.................................................................... 156
4.3.1.1 Description ...................................................................................................................... 156
4.3.1.2 Technical specifications.................................................................................................... 159
4.3.1.3 Installation....................................................................................................................... 163
4.3.1.4 Article number................................................................................................................. 164
4.3.2 Capacitor trip device for shunt trips.................................................................................. 166
4.3.2.1 Description ...................................................................................................................... 166
4.3.2.2 Technical specifications.................................................................................................... 166
4.3.2.3 Installation....................................................................................................................... 167
4.3.2.4 Article number................................................................................................................. 167
4.3.3 Remote trip alarm reset coil.............................................................................................. 168

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4.3.3.1 Description...................................................................................................................... 168
4.3.3.2 Technical specifications ................................................................................................... 169
4.3.3.3 Installation ...................................................................................................................... 170
4.3.3.4 Article number................................................................................................................. 172
4.3.4 Emergency OPEN button.................................................................................................. 173
4.3.4.1 Description...................................................................................................................... 173
4.3.4.2 Installation ...................................................................................................................... 173
4.3.4.3 Article number................................................................................................................. 173
4.3.5 IOM230 digital input/output module................................................................................ 174
4.3.5.1 Description...................................................................................................................... 174
4.3.5.2 Technical specifications ................................................................................................... 178
4.3.5.3 Installation ...................................................................................................................... 179
4.3.5.4 Article number................................................................................................................. 179
4.3.6 Spring charging motor..................................................................................................... 180
4.3.6.1 Description...................................................................................................................... 180
4.3.6.2 Technical specifications ................................................................................................... 181
4.3.6.3 Installation ...................................................................................................................... 182
4.3.6.4 Article number................................................................................................................. 182
4.3.7 Motor disconnect switch.................................................................................................. 183
4.3.7.1 Description...................................................................................................................... 183
4.3.7.2 Installation ...................................................................................................................... 183
4.3.7.3 Article number................................................................................................................. 184
4.3.8 Mechanical operating cycles counter................................................................................ 185
4.3.8.1 Description...................................................................................................................... 185
4.3.8.2 Installation ...................................................................................................................... 186
4.3.8.3 Article number................................................................................................................. 186
4.3.9 External Trip Controller ETC600........................................................................................ 187
4.3.9.1 Description...................................................................................................................... 187
4.3.9.2 Technical specifications ................................................................................................... 188
4.3.9.3 Installation ...................................................................................................................... 189
4.3.9.4 Article number................................................................................................................. 189
4.3.10 Second tripping solenoid with reclosing lockout ............................................................... 190
4.3.10.1 Description...................................................................................................................... 190
4.3.10.2 Installation ...................................................................................................................... 190
4.3.10.3 Article number................................................................................................................. 194
4.4 Accessory auxiliary switches and signaling switches ......................................................... 195
4.4.1 Overview......................................................................................................................... 195
4.4.2 Auxiliary switches S1 to S8 (AUX)..................................................................................... 196
4.4.2.1 Description...................................................................................................................... 196
4.4.2.2 Technical specifications ................................................................................................... 196
4.4.2.3 Installation ...................................................................................................................... 197
4.4.2.4 Article number................................................................................................................. 197
4.4.3 Ready-to-close signaling switch........................................................................................ 198
4.4.3.1 Description...................................................................................................................... 198
4.4.3.2 Technical specifications ................................................................................................... 199
4.4.3.3 Installation ...................................................................................................................... 199
4.4.3.4 Article number................................................................................................................. 199
4.4.4 Spring charge signaling switch......................................................................................... 200
4.4.4.1 Description...................................................................................................................... 200
4.4.4.2 Technical specifications ................................................................................................... 200
4.4.4.3 Installation ...................................................................................................................... 201
4.4.4.4 Article number................................................................................................................. 201

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4.4.5 Trip alarm switch ............................................................................................................. 202
4.4.5.1 Description ...................................................................................................................... 202
4.4.5.2 Technical specifications.................................................................................................... 202
4.4.5.3 Installation....................................................................................................................... 203
4.4.5.4 Article number................................................................................................................. 203
4.4.6 Position signaling switch module for guide frame............................................................. 204
4.4.6.1 Description ...................................................................................................................... 204
4.4.6.2 Technical specifications.................................................................................................... 206
4.4.6.3 Installation....................................................................................................................... 207
4.4.6.4 Article number................................................................................................................. 207
4.5 Accessories for main connections..................................................................................... 208
4.5.1 Main connections for fixed-mounted circuit breakers........................................................ 208
4.5.1.1 Description ...................................................................................................................... 208
4.5.1.2 Technical specifications.................................................................................................... 211
4.5.1.3 Installation....................................................................................................................... 211
4.5.1.4 Article number................................................................................................................. 215
4.5.2 Main connections for withdrawable circuit breakers ......................................................... 217
4.5.2.1 Description ...................................................................................................................... 217
4.5.2.2 Technical specifications.................................................................................................... 220
4.5.2.3 Installation....................................................................................................................... 220
4.5.2.4 Article number................................................................................................................. 221
4.6 Accessories for secondary disconnect terminals................................................................ 224
4.6.1 Secondary disconnect terminals for fixed-mounted circuit breakers .................................. 224
4.6.1.1 Description ...................................................................................................................... 224
4.6.1.2 Installation....................................................................................................................... 225
4.6.1.3 Connection...................................................................................................................... 226
4.6.1.4 Article number................................................................................................................. 226
4.6.2 Secondary disconnect terminals for withdrawable circuit breakers.................................... 227
4.6.2.1 Description ...................................................................................................................... 227
4.6.2.2 Installation....................................................................................................................... 228
4.6.2.3 Connection...................................................................................................................... 229
4.6.2.4 Article number................................................................................................................. 229
4.7 Conversion set and coding for withdrawable circuit breakers............................................ 230
4.7.1 Conversion set for converting fixed-mounted circuit breakers into withdrawable circuit
breakers .......................................................................................................................... 230
4.7.1.1 Description ...................................................................................................................... 230
4.7.1.2 Technical specifications.................................................................................................... 231
4.7.1.3 Installation....................................................................................................................... 232
4.7.1.4 Article number................................................................................................................. 236
4.7.2 Equipment-dependent coding.......................................................................................... 237
4.7.2.1 Description ...................................................................................................................... 237
4.7.2.2 Installation....................................................................................................................... 238
4.7.2.3 Article number................................................................................................................. 239
4.8 Accessories for protection against unauthorized operation ............................................... 240
4.8.1 Overview of locking devices and locking provisions .......................................................... 240
4.8.2 Locking provision to prevent unauthorized closing - Safe Open......................................... 243
4.8.2.1 Description ...................................................................................................................... 243
4.8.2.2 Installation....................................................................................................................... 245
4.8.2.3 Activation........................................................................................................................ 247
4.8.2.4 Article number................................................................................................................. 248

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4.8.3 Local electric close........................................................................................................... 249
4.8.3.1 Description...................................................................................................................... 249
4.8.3.2 Installation ...................................................................................................................... 250
4.8.3.3 Connection...................................................................................................................... 250
4.8.3.4 Activation........................................................................................................................ 251
4.8.3.5 Article number................................................................................................................. 251
4.8.4 Locking provision for charging handle for padlocks........................................................... 252
4.8.4.1 Description...................................................................................................................... 252
4.8.4.2 Installation ...................................................................................................................... 252
4.8.4.3 Activation........................................................................................................................ 253
4.8.4.4 Article number................................................................................................................. 253
4.8.5 Cover for the electronic trip unit....................................................................................... 254
4.8.5.1 Description...................................................................................................................... 254
4.8.5.2 Installation ...................................................................................................................... 255
4.8.5.3 Article number................................................................................................................. 255
4.8.6 Locking provision to prevent unauthorized closing of the withdrawable circuit breaker..... 256
4.8.6.1 Description...................................................................................................................... 256
4.8.6.2 Installation ...................................................................................................................... 257
4.8.6.3 Activation........................................................................................................................ 257
4.8.6.4 Article number................................................................................................................. 258
4.8.7 Locking provision with padlock for the racking handle of the racking mechanism.............. 258
4.8.7.1 Description...................................................................................................................... 258
4.8.7.2 Activation........................................................................................................................ 258
4.8.8 Locking provision with safety lock for the racking handle.................................................. 259
4.8.8.1 Description...................................................................................................................... 259
4.8.8.2 Installation ...................................................................................................................... 260
4.8.8.3 Activation........................................................................................................................ 261
4.8.8.4 Article number................................................................................................................. 261
4.8.9 Shutters........................................................................................................................... 262
4.8.9.1 Installation ...................................................................................................................... 262
4.8.9.2 Article number................................................................................................................. 264
4.8.10 Locking provision to prevent opening of the control cabinet door when the circuit
breaker is closed .............................................................................................................. 265
4.8.10.1 Description...................................................................................................................... 265
4.8.10.2 Installation ...................................................................................................................... 266
4.8.10.3 Activation / override......................................................................................................... 268
4.8.10.4 Article number................................................................................................................. 268
4.8.11 Locking provision to prevent racking of the withdrawable circuit breaker in the
disconnected position...................................................................................................... 269
4.8.11.1 Description...................................................................................................................... 269
4.8.11.2 Installation ...................................................................................................................... 270
4.8.11.3 Activation........................................................................................................................ 271
4.8.11.4 Article number................................................................................................................. 272
4.8.12 Locking provision to prevent racking of the withdrawable circuit breaker when the
control cabinet door is open............................................................................................. 273
4.8.12.1 Description...................................................................................................................... 273
4.8.12.2 Installation ...................................................................................................................... 274
4.8.12.3 Activation........................................................................................................................ 274
4.8.12.4 Article number................................................................................................................. 274
4.8.13 Locking provision to prevent closing of the withdrawable circuit breaker when the
control cabinet door is open............................................................................................. 275
4.8.13.1 Description...................................................................................................................... 275

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4.8.13.2 Installation....................................................................................................................... 276
4.8.13.3 Activation / override......................................................................................................... 279
4.8.13.4 Article number................................................................................................................. 279
4.9 Interlocking ..................................................................................................................... 280
4.9.1 Mechanical interlocking (Bowden cable interlocking)........................................................ 280
4.9.1.1 Description ...................................................................................................................... 280
4.9.1.2 Installation....................................................................................................................... 284
4.9.1.3 Article number................................................................................................................. 288
4.9.2 Interlocking of two circuit breakers using a Bowden cable................................................. 289
4.9.3 Interlocking of three circuit breakers (one of three) using a Bowden cable ........................ 290
4.9.4 Interlocking of three circuit breakers using a Bowden cable .............................................. 291
4.9.5 Interlocking of three circuit breakers, two of which are interlocked, using a Bowden
cable ............................................................................................................................... 292
4.9.6 Interlocking of three circuit breakers using a Bowden cable .............................................. 293
4.9.7 Interlock for mechanical close/open ................................................................................. 294
4.9.7.1 Description ...................................................................................................................... 294
4.9.7.2 Installation....................................................................................................................... 295
4.9.7.3 Activation........................................................................................................................ 295
4.9.7.4 Article number................................................................................................................. 296
4.9.8 Interlock system to prevent unauthorized closing ............................................................. 297
4.9.8.1 Description ...................................................................................................................... 297
4.9.8.2 Installation....................................................................................................................... 297
4.9.8.3 Activation........................................................................................................................ 297
4.9.8.4 Article number................................................................................................................. 297
4.10 Accessories for integration in the power distribution equipment....................................... 298
4.10.1 Door sealing frame .......................................................................................................... 298
4.10.1.1 Description ...................................................................................................................... 298
4.10.1.2 Installation....................................................................................................................... 299
4.10.1.3 Article number................................................................................................................. 299
4.10.2 IP55 protective cover ....................................................................................................... 300
4.10.2.1 Description ...................................................................................................................... 300
4.10.2.2 Installation....................................................................................................................... 301
4.10.2.3 Article number................................................................................................................. 301
4.10.3 Arc chute cover................................................................................................................ 302
4.10.3.1 Description ...................................................................................................................... 302
4.10.3.2 Installation....................................................................................................................... 303
4.10.3.3 Article number................................................................................................................. 305
4.10.4 Grounding connection between the guide frame and the circuit breaker........................... 306
4.10.4.1 Description ...................................................................................................................... 306
4.10.4.2 Installation....................................................................................................................... 307
4.10.4.3 Article number................................................................................................................. 309
4.10.5 Support brackets.............................................................................................................. 310
4.10.5.1 Description ...................................................................................................................... 310
4.10.5.2 Installation....................................................................................................................... 311
4.10.5.3 Article number................................................................................................................. 312
4.11 Accessories for the ETU600 electronic trip unit ................................................................. 313
4.11.1 External current sensor for neutral pole............................................................................ 313
4.11.1.1 Description ...................................................................................................................... 313
4.11.1.2 Technical specifications.................................................................................................... 314
4.11.1.3 Installation....................................................................................................................... 314
4.11.1.4 Article number................................................................................................................. 315

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4.11.2 Voltage tap module VTM.................................................................................................. 316
4.11.2.1 Description...................................................................................................................... 316
4.11.2.2 Removal / installation....................................................................................................... 317
4.11.2.3 Article number................................................................................................................. 317
4.11.3 Option plug ..................................................................................................................... 318
4.11.3.1 Description...................................................................................................................... 318
4.11.3.2 Removal / installation....................................................................................................... 319
4.11.3.3 Article number................................................................................................................. 320
4.11.4 Replacement battery for the ETU600 electronic trip unit................................................... 321
4.11.4.1 Description...................................................................................................................... 321
4.11.4.2 Replacing the battery....................................................................................................... 321
4.11.4.3 Article number................................................................................................................. 321
4.12 Internal voltage tap on main circuits ................................................................................ 322
4.12.1 Voltage tap conversion .................................................................................................... 322
4.12.1.1 Description...................................................................................................................... 322
4.12.1.2 Installation ...................................................................................................................... 323
4.12.1.3 Article number................................................................................................................. 326
4.12.2 Retrofit of the internal voltage tap.................................................................................... 327
4.12.2.1 Description...................................................................................................................... 327
4.12.2.2 Installation ...................................................................................................................... 328
4.12.2.3 Article number................................................................................................................. 330
4.13 Connection of an external voltage transformer................................................................. 331
4.13.1 Description...................................................................................................................... 331
4.13.2 Connection...................................................................................................................... 332
4.13.3 Article number................................................................................................................. 333
4.14 Function packages for the ETU600 electronic trip unit ...................................................... 334
4.14.1 Description...................................................................................................................... 334
4.14.2 Function packages for protection and alarm functions...................................................... 334
4.14.2.1 Description...................................................................................................................... 334
4.14.2.2 Article number................................................................................................................. 334
4.14.3 Function packages for enhanced protective functions ...................................................... 335
4.14.3.1 Description...................................................................................................................... 335
4.14.3.2 Article number................................................................................................................. 336
4.14.4 Function packages for function extensions....................................................................... 336
4.14.4.1 Description...................................................................................................................... 336
4.14.4.2 Article number................................................................................................................. 336
4.14.5 Function packages for metering values ............................................................................ 337
4.14.5.1 Description...................................................................................................................... 337
4.14.5.2 Article number................................................................................................................. 338
4.15 Accessories for CubicleBUS² modules ............................................................................... 339
4.15.1 CubicleBUS² terminating resistor...................................................................................... 339
4.15.1.1 Description...................................................................................................................... 339
4.15.1.2 Technical specifications ................................................................................................... 339
4.15.1.3 Article number................................................................................................................. 339
4.15.2 Mounting adapter for CubicleBUS² modules ..................................................................... 340
4.15.2.1 Description...................................................................................................................... 340
4.15.2.2 Installation ...................................................................................................................... 340
4.15.2.3 Article number................................................................................................................. 343
4.16 Communication interface................................................................................................. 344
4.16.1 PROFINET IO/Modbus TCP module COM190...................................................................... 344

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4.16.1.1 Description ...................................................................................................................... 344
4.16.1.2 Technical specifications.................................................................................................... 345
4.16.1.3 Installation....................................................................................................................... 346
4.16.1.4 Article number................................................................................................................. 346
4.16.2 Position signaling switch module for connection to the communication module............... 347
4.16.2.1 Description ...................................................................................................................... 347
4.16.2.2 Installation....................................................................................................................... 347
4.16.2.3 Article number................................................................................................................. 347
4.17 Special packaging ............................................................................................................ 348
4.17.1 Description ...................................................................................................................... 348
4.17.2 Article number................................................................................................................. 348
5 Inspection and maintenance ............................................................................................................. 349
5.1 General............................................................................................................................ 349
5.2 Safety regulations............................................................................................................ 351
5.3 Planning of inspection and maintenance .......................................................................... 352
5.3.1 Inspection interval ........................................................................................................... 352
5.3.2 Scope .............................................................................................................................. 353
5.3.3 Logging ........................................................................................................................... 355
5.4 Performing inspection...................................................................................................... 356
5.4.1 General............................................................................................................................ 356
5.4.2 Visual inspection.............................................................................................................. 356
5.4.3 Check of the available documentation and of the rating/accessory label............................ 357
5.4.4 Testing of mechanical function of the circuit breaker........................................................ 357
5.4.5 Testing of mechanical function of the withdrawable circuit breaker and the guide
frame .............................................................................................................................. 358
5.4.6 Testing of auxiliary circuits............................................................................................... 358
5.4.7 Testing of mechanical and electrical function of internal accessories................................. 359
5.4.8 Testing of settings and inspection of electronic trip unit ................................................... 360
5.4.9 Inspection of the arc chutes, arc chute cover and the contact system................................ 360
5.4.10 Testing of the function of the CubicleBUS² modules.......................................................... 361
5.5 Preparing for maintenance work ...................................................................................... 362
5.6 Maintaining the arc chutes............................................................................................... 365
5.7 Maintaining the main contacts......................................................................................... 368
5.7.1 Maintaining the main contacts and replacing the contact system...................................... 368
5.7.2 Article number................................................................................................................. 376
5.8 Decommissioning ............................................................................................................ 378
6 Technical specifications..................................................................................................................... 379
6.1 Circuit diagrams............................................................................................................... 379
6.1.1 Terminal connection diagram of secondary disconnect terminal ....................................... 380
6.1.2 Closing coil...................................................................................................................... 381
6.1.3 Remote trip alarm reset coil.............................................................................................. 381
6.1.4 Shunt trip ST / ST2............................................................................................................ 381
6.1.5 Capacitor trip device for shunt trips.................................................................................. 382
6.1.6 Undervoltage release UVR / UVR-t..................................................................................... 382
6.1.7 Second tripping solenoid F6 with reclosing lockout........................................................... 383
6.1.8 External Trip Controller ETC600........................................................................................ 383

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12 Equipment Manual, 05/2021, 92310000002-03
6.1.9 Digital input / output module IOM230.............................................................................. 383
6.1.10 Spring charging motor..................................................................................................... 384
6.1.11 Motor disconnect switch.................................................................................................. 384
6.1.12 Auxiliary switch ............................................................................................................... 384
6.1.13 Ready-to-close signaling switch S20................................................................................. 385
6.1.14 Spring charge signaling switch S21 .................................................................................. 385
6.1.15 Trip alarm switches S24 and S25...................................................................................... 385
6.1.16 Position signaling switch module PSS and PSS-COM.......................................................... 386
6.1.17 Local electric close S10 .................................................................................................... 386
6.1.18 COM190 communication module..................................................................................... 387
6.1.19 Breaker status sensor BSS................................................................................................. 387
6.2 Dimension drawings ........................................................................................................ 388
6.2.1 3WA1 - size 1................................................................................................................... 388
6.2.1.1 Fixed-mounted circuit breakers........................................................................................ 388
6.2.1.2 Withdrawable circuit breakers.......................................................................................... 393
6.2.2 3WA1 - size 2................................................................................................................... 401
6.2.2.1 Fixed-mounted circuit breakers........................................................................................ 401
6.2.2.2 Withdrawable circuit breakers.......................................................................................... 406
6.2.3 3WA1 - size 3................................................................................................................... 414
6.2.3.1 Fixed-mounted circuit breakers........................................................................................ 414
6.2.3.2 Withdrawable circuit breakers.......................................................................................... 419
6.2.4 Safety clearances............................................................................................................. 426
6.2.4.1 3WA - size 1..................................................................................................................... 426
6.2.4.2 3WA - size 2..................................................................................................................... 428
6.2.4.3 3WA - size 3..................................................................................................................... 430
6.2.5 Accessories and door cutouts........................................................................................... 432
6.2.5.1 Capacitor storage device.................................................................................................. 432
6.2.5.2 COM190 communication module..................................................................................... 433
6.2.5.3 External current sensor for the neutral pole (N-CT) ........................................................... 434
6.2.5.4 Support brackets.............................................................................................................. 436
6.2.5.5 Door cutout/protective cover IP55 .................................................................................... 436
6.2.5.6 Door sealing frame .......................................................................................................... 437
6.2.5.7 Interlocks and locking provisions...................................................................................... 438
6.3 Technical specifications of 3WA circuit breakers ............................................................... 440
6.3.1 Size 1 .............................................................................................................................. 440
6.3.1.1 General technical details.................................................................................................. 440
6.3.1.2 Breaking capacity and short-time withstand current ......................................................... 441
6.3.1.3 Permissible load, switching times, operating cycles and operating frequency.................... 442
6.3.1.4 Conductor cross-sections ................................................................................................. 444
6.3.1.5 IT network capability........................................................................................................ 444
6.3.2 Size 2 .............................................................................................................................. 445
6.3.2.1 General technical details.................................................................................................. 445
6.3.2.2 Breaking capacity and short-time withstand current ......................................................... 446
6.3.2.3 Permissible load, switching times, operating cycles and operating frequency.................... 448
6.3.2.4 Conductor cross-sections ................................................................................................. 452
6.3.2.5 IT network capability........................................................................................................ 453
6.3.3 Size 3 .............................................................................................................................. 454
6.3.3.1 General technical details.................................................................................................. 454
6.3.3.2 Breaking capacity and short-time withstand current ......................................................... 455
6.3.3.3 Permissible load, switching times, operating cycles and operating frequency.................... 456
6.3.3.4 Conductor cross-sections ................................................................................................. 458

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3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03 13
6.3.3.5 IT network capability........................................................................................................ 458
6.3.4 Other properties .............................................................................................................. 459
6.4 Ambient conditions.......................................................................................................... 460
6.5 Installation altitudes......................................................................................................... 461
6.6 Standards ........................................................................................................................ 461
6.7 Approvals ........................................................................................................................ 462
6.8 Failure probability acc. to B10 and B10d........................................................................... 463
6.9 Electromagnetic compatibility.......................................................................................... 466
7 Integration in power distribution equipment ................................................................................... 467
7.1 Factors that affect the rating of the circuit breaker ........................................................... 467
7.2 Compact design............................................................................................................... 468
7.3 Derating in the power distribution equipment.................................................................. 469
7.3.1 Overview......................................................................................................................... 469
7.3.2 Derating 3WA11 .............................................................................................................. 470
7.3.3 Derating 3WA12 .............................................................................................................. 474
7.3.4 Derating 3WA13 .............................................................................................................. 476
7.4 Insulation test of the power distribution equipment ......................................................... 478
7.5 Main connection.............................................................................................................. 479
7.6 Requirement according to IEC 61439 ............................................................................... 479
7.6.1 Standard IEC 61439 ......................................................................................................... 479
7.6.2 Simplified integration ...................................................................................................... 480
7.6.2.1 Structural integration in power distribution equipment..................................................... 480
7.6.2.2 Using 3WA circuit breakers in 3WL guide frames............................................................... 481
7.6.2.3 Retrofit: Simple replaceability in existing power distribution equipment............................ 482
7.6.2.4 Checklist for replacing 3WL with 3WA circuit breaker according to IEC 61439-2 ................ 486
7.7 Phase barriers and horizontal partitions............................................................................ 488
8 Troubleshooting ................................................................................................................................ 491
8.1 Troubleshooting for circuit breaker................................................................................... 491
8.2 Troubleshooting for the ETU600 electronic trip unit.......................................................... 493
8.3 Troubleshooting for COM190 communication module...................................................... 496
9 Disposal.............................................................................................................................................. 497
9.1 End of maximum service life ............................................................................................ 497
9.2 Disposal of low-voltage circuit breakers............................................................................ 497
9.3 Disposal of waste electronic equipment............................................................................ 497
A Appendix............................................................................................................................................ 499
A.1 Basic settings of parameter data sets................................................................................ 499
A.2 ETU600 menu structure ................................................................................................... 501
A.3 Templates for coding the equipment variants in use......................................................... 504

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3WA Air Circuit Breakers
14 Equipment Manual, 05/2021, 92310000002-03
B ESD guidelines................................................................................................................................... 509
B.1 Electrostatic sensitive devices (ESD) ................................................................................. 509
C List of abbreviations .......................................................................................................................... 511

3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03 15
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
3WA Air Circuit Breakers
16 Equipment Manual, 05/2021, 92310000002-03
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
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 A19100-L531-
B115
Schalten, Schützen, Verteilen in Niederspannungsnetzen (Switching, Protec-
tion and Distribution in Low-
Voltage Networks), substantially extended and
revised edition 1997
ISBN 3-89578-041-3
Siemens: Residual Current Protective Devices, Low-Voltage Circuit Protec-
tion Technology Primer Siemens AG © 04 / 2009
E10003-E38-9T-B3011
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.

Introduction
1.6 Safety instructions
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03 17
1.6 Safety instructions
DANGER
Hazardous voltage
Will cause death, serious personal injury, or equipment damage.
During operation, parts of the device or system are carrying hazardous electrical voltage.
Improper handling of the device or system can result in death or serious injury, as well as
significant material damage.
•Inspection and maintenance may only be performed by qualified personnel.
•Pay attention to all the notices provided on the product and in this manual.
•Before commencing maintenance work, ensure that no voltage is present on the power
distribution equipment and make sure that this condition is maintained while work is
being performed (according to EN 50110-1, DIN VDE 0105-100 and BGV A2).
Proceed in accordance with the Five Safety Rules:
–Turn off all power supplying the equipment.
–Lock out all power supplying the equipment to secure against reconnection.
–Verify that no voltage is present on the device.
–Ground and short the circuit.
–
Provide protection against adjacent live parts.
Qualified personnel
Inspection and maintenance may only be performed by qualified personnel.
In the context of these operating instructions and the warning notices on the product,
qualified personnel refers to persons who are familiar with the erection, installation,
commissioning and operation of the product and who possess the qualifications appropriate
for their activities, e.g.:
•Training or instruction/authorization to close and open, ground, and tag circuits and
devices and systems in accordance with established safety procedures.
•Training or instruction in the proper care and use of protective equipment in accordance
with established safety procedures.
•Training in first aid.
Spare parts
Only spare parts approved by the manufacturer may be used.

Introduction
1.6 Safety instructions
3WA Air Circuit Breakers
18 Equipment Manual, 05/2021, 92310000002-03
1.6.1 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the Internet if and to the extent such a connection is necessary
and only when appropriate security measures (e.g. firewalls and/or network segmentation)
are in place.
For additional information on industrial security measures that may be implemented, please
visit (https://www.siemens.com/industrialsecurity).
Siemens’ products and solutions undergo continuous development to make them more
secure. Siemens strongly recommends that product updates are applied as soon as they are
available and that the latest product versions are used. Use of product versions that are no
longer supported, and failure to apply the latest updates may increase customer’s exposure to
cyber threats.
To keep up to date with all the latest product updates, subscribe to the Siemens Industrial
Security RSS Feed at (https://www.siemens.com/industrialsecurity).
1.6.2 Open Source Software
This product, solution or service (“Product”) contains third-party software components. These
components are Open Source Software licensed under a license approved by the Open
Source Initiative (https://www.opensource.org) or similar licenses as determined by SIEMENS
(“OSS”) and/or commercial or freeware software components. With respect to the OSS
components, the applicable OSS license conditions prevail over any other terms and
conditions covering the Product. The OSS portions of this Product are provided royalty-free
and can be used at no charge.
If SIEMENS has combined or linked certain components of the Product with/to OSS
components licensed under the GNU LGPL version 2 or later as per the definition of the
applicable license, and if use of the corresponding object file is not unrestricted (“LGPL
Licensed Module”, whereas the LGPL Licensed Module and the components that the LGPL
Licensed Module is combined with or linked to is the “Combined Product”), the following
additional rights apply, if the relevant LGPL license criteria are met: (i) you are entitled to
modify the Combined Product for your own use, including but not limited to the right to
modify the Combined Product to relink modified versions of the LGPL Licensed Module, and
(ii) you may reverse-engineer the Combined Product, but only to debug your modifications.
The modification right does not include the right to distribute such modifications and you
shall maintain in confidence any information resulting from such reverse-engineering of a
Combined Product.