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.
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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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Equipment Manual, 02/2023, 92310000002-06 5
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