Siemens SINOVA User manual

3WJ Air Circuit breakers
SINOVA
Circuit Breakers
3WJ Air Circuit breakers
Operating Instructions
12/2022
L1V30828903001
-01
Introduction
1
Description
2
Accessories
3
Inspection & Maintenance
4
Technical specifications
5
Troubleshooting
6
Disposal
7
ESD guidelines
A
List of abbreviations
B

Siemens AG
Smart Infrastructure
Electrical Products
Postfach 10 09 53
93009 Regensburg
GERMANY
Ⓟ
12/2022 Subject to change
Copyright © Siemens AG 2022.
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.

3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 3
Table of contents
1 Introduction ........................................................................................................................................... 6
1.1 Technical support ................................................................................................................ 6
1.2 Safety instructions ............................................................................................................... 7
1.3 Standards ............................................................................................................................ 8
1.4 Transport............................................................................................................................. 8
2 Description........................................................................................................................................... 10
2.1 Mechanical components .................................................................................................... 10
2.1.1 Design............................................................................................................................... 10
2.1.1.1 Circuit Breaker ................................................................................................................... 10
2.1.1.2 Guide frame ...................................................................................................................... 12
2.1.2 Circuit Breaker identification .............................................................................................. 13
2.1.2.1 Accessory and rating label.................................................................................................. 13
2.1.3 Indicators of the Circuit Breaker ......................................................................................... 15
2.1.4 Operation .......................................................................................................................... 16
2.1.4.1 Installation ........................................................................................................................ 16
2.1.4.2 Racking the Circuit Breaker in or out................................................................................... 18
2.1.4.3 Position of the Circuit Breaker in the guide frame ............................................................... 21
2.1.4.4 Removing the Circuit Breaker from the guide frame............................................................ 22
2.1.4.5 Inserting the Circuit Breaker into the guide frame............................................................... 23
2.1.4.6 Closing and opening .......................................................................................................... 24
2.1.4.7 Commissioning checklist.................................................................................................... 28
2.1.5 Connection........................................................................................................................ 29
2.1.5.1 Main connections .............................................................................................................. 29
2.1.5.2 Secondary disconnect terminals ......................................................................................... 35
2.1.5.3 Connecting the protective conductor ................................................................................. 38
2.2 Electronic components ...................................................................................................... 39
2.2.1 Electronic Trip Unit (ETU) - functional overview .................................................................. 39
2.2.2 ETU350WJ ......................................................................................................................... 41
2.2.3 ETU360WJ ......................................................................................................................... 44
2.2.4 Indicators on the ETU......................................................................................................... 48
2.2.5 Protection functions........................................................................................................... 50
2.2.5.1 Basic protection functions .................................................................................................. 50
2.2.5.2 LT: Overload protection (Long time), L-tripping .................................................................. 50
2.2.5.3 ST: Short-time delay short-circuit release (Short time), S tripping........................................ 51
2.2.5.4 INST: Instantaneous short-circuit release (Instantaneous), I-tripping ................................... 51
2.2.5.5 GF: Ground-fault protection (Ground-fault), G-tripping....................................................... 52
2.2.5.6 N: Neutral conductor protection (Neutral), N-tripping......................................................... 52
2.2.6 Additional functions........................................................................................................... 52
2.2.7 Menus on the displays of the ETU350WJ and ETU360WJ..................................................... 53
2.2.8 Recommissioning after opening operation by electronic trip unit ........................................ 55

Table of contents
3WJ Air Circuit breakers
4Operating Instructions, 12/2022, L1V30828903001-01
3 Accessories .......................................................................................................................................... 56
3.1 Overview........................................................................................................................... 56
3.2 Preparatory and concluding installation steps for the installation of internal accessories ..... 57
3.3 Control and signaling accessories....................................................................................... 60
3.3.1 Overview........................................................................................................................... 60
3.3.2 Closing coil, shunt trip and undervoltage release................................................................ 61
3.3.2.1 Installation ........................................................................................................................ 66
3.3.2.2 Part number ...................................................................................................................... 67
3.3.3 Counting mechanism......................................................................................................... 68
3.4 Monitoring switches and signaling accessories ................................................................... 70
3.4.1 Position signaling switch for guide frame ........................................................................... 70
3.5 Accessories for main connections....................................................................................... 72
3.5.1 Connection bars for guide frame (frame size I) ................................................................... 72
3.5.2 Connection bars for guide frame (frame size II) .................................................................. 76
3.5.3 Vertical connections for fixed-mounted Circuit Breaker....................................................... 80
3.6 Accessories for secondary disconnect terminals.................................................................. 83
3.6.1 Secondary disconnect terminals for fixed-mounted Circuit breakers.................................... 83
3.6.2 Secondary disconnect terminals for withdrawable Circuit breakers ..................................... 85
3.7 Accessories for the Electronic Trip Unit............................................................................... 86
3.7.1 Hand-held test device ........................................................................................................ 86
3.7.2 External transformer for neutral conductors (for ETU360WJ) .............................................. 91
3.7.3 Retrofitting the internal N transformer ............................................................................... 94
3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers ............. 97
3.9 Accessories for locking and interlocking ........................................................................... 105
3.9.1 Safety locking device ....................................................................................................... 105
3.9.2 Mounting set for 3WJ lock or CASTELL lock....................................................................... 107
3.9.3 3WJ lock (set), 3 locks with 2 keys.................................................................................... 109
3.9.4 Door interlock.................................................................................................................. 116
3.9.4.1 Door interlock for fixed-mounted Circuit Breaker .............................................................. 116
3.9.4.2 Door interlock for guide frame ......................................................................................... 119
3.9.5 Mechanical interlock........................................................................................................ 123
3.9.5.1 Information about mechanical interlock ........................................................................... 123
3.9.5.2 Mechanical interlock of fixed-mounted Circuit Breakers.................................................... 129
3.9.5.3 Mechanical interlock of withdrawable Circuit Breakers...................................................... 134
3.9.5.4 Installing Bowden wire..................................................................................................... 138
3.10 Accessories for integration in the power distribution equipment....................................... 141
3.10.1 Door sealing frame IP41................................................................................................... 141
3.10.2 Protective cover IP55 ....................................................................................................... 143
3.10.3 Arc chute cover................................................................................................................ 144
3.10.4 Shutters........................................................................................................................... 148
3.10.5 Phase barrier ................................................................................................................... 155
3.10.5.1 Phase barrier for fixed-mounted Circuit Breaker................................................................ 156
3.10.5.2 Phase barrier for guide frame........................................................................................... 161

Table of contents
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 5
4 Inspection & Maintenance................................................................................................................. 165
4.1 General ........................................................................................................................... 165
4.2 Safety regulations............................................................................................................ 167
4.3 Planning of inspection and maintenance .......................................................................... 168
4.3.1 Inspection interval ........................................................................................................... 168
4.3.2 Scope .............................................................................................................................. 168
4.3.3 Logging ........................................................................................................................... 170
4.4 Performing inspection...................................................................................................... 171
4.4.1 General ........................................................................................................................... 171
4.4.2 Visual inspection.............................................................................................................. 171
4.4.3 Check of the available documentation and of the rating/accessory label............................ 172
4.4.4 Testing of mechanical function of the circuit breaker........................................................ 172
4.4.5 Testing of mechanical function of the withdrawable circuit breaker and the guide
frame .............................................................................................................................. 173
4.4.6 Testing of auxiliary circuits............................................................................................... 173
4.4.7 Testing of mechanical and electrical function of internal accessories................................. 174
4.4.8 Testing of settings and inspection of the electronic trip unit ............................................. 175
4.4.9 Inspection of arc chutes, arc chute covers and main contact system.................................. 176
4.4.10 Checking the wear on the contacts................................................................................... 177
4.5 Preparation for maintenance work ................................................................................... 178
4.6 Maintaining the arc chutes............................................................................................... 180
4.7 Maintaining the main contact system............................................................................... 181
5 Technical specifications..................................................................................................................... 196
5.1 Circuit diagrams............................................................................................................... 196
5.1.1 Overall circuit diagram..................................................................................................... 196
5.1.2 Terminal connection diagram of secondary disconnect terminals...................................... 198
5.1.3 Circuit diagram for undervoltage release with delay ......................................................... 199
5.2 Dimension drawings ........................................................................................................ 199
5.2.1 Fixed-mounted Circuit Breakers........................................................................................ 199
5.2.2 Withdrawable Circuit Breakers.......................................................................................... 202
5.2.3 Accessories 3 pole / 4 pole ............................................................................................... 203
5.2.4 Door cutout ..................................................................................................................... 205
5.2.5 Current transformer for N conductor ................................................................................ 206
6 Troubleshooting ................................................................................................................................ 207
7 Disposal ............................................................................................................................................. 209
A ESD guidelines ................................................................................................................................... 210
B List of abbreviations .......................................................................................................................... 212
Glossary ............................................................................................................................................. 215

3WJ Air Circuit breakers
6Operating Instructions, 12/2022, L1V30828903001-01
Introduction
1
Scope of validity of this manual
This equipment manual is a reference manual for technical information that users will need
to configure, connect and operate the 3WJ Circuit Breakers and their accessories.
Target readers of this document
The information contained in this manual is provided for the benefit of:
•Planners
•Power distribution equipment manufacturers/builders
•Commissioning engineers
•Users
•Maintenance personnel
Ambient conditions
The Circuit Breakers are designed to be operated in enclosed rooms in which the operating
conditions are not affected by dust or corrosive vapors/gases. Suitable enclosures must be
used in dusty or damp conditions.
1.1 Technical support
You can find further support on the Internet (https://www.siemens.com/support-request).

Introduction
1.2 Safety instructions
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 7
1.2 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
1.3 Standards
3WJ Air Circuit breakers
8Operating Instructions, 12/2022, L1V30828903001-01
1.3 Standards
The 3WJ Circuit Breakers comply with the following standards:
•IEC 60947-2
•EN 60947-2
See also
https://support.industry.siemens.com/ (https://support.industry.siemens.com/)
1.4 Transport
Long-term storage
•Seal the plastic film.
•Check the packaging regularly.
Unpacking and storing the Circuit Breaker
Unpack the Circuit Breaker and make sure that it was not damaged during transportation.
If the Circuit Breaker or guide frame is not to be installed immediately, it must be stored and
shipped in its original packaging only.
For withdrawable Circuit Breaker:
•Racking the Circuit Breaker in or out (Page 18)
•Removing the Circuit Breaker from the guide frame (Page 22)
•Inserting the Circuit Breaker into the guide frame (Page 23)
CAUTION
Equipment damage
Do not place the Circuit Breaker on its rear side.

Introduction
1.4 Transport
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 9
Transportation with crane
Circuit Breaker fixed
Circuit Breaker withdrawable
Guide frame
Breakers / No. of
poles
Weight for reference
3WJ11 / 3
3WJ11 / 4
3WJ12 / 3
3WJ12 / 4
≤35 kg
≤48 kg
≤60 kg
≤73 kg
≤38 kg
≤51 kg
≤63 kg
≤76 kg
≤23 kg
≤28 kg
≤37 kg
≤48 kg
Setting down the guide frame
Note
Only set the guide frame down on its base plate.
If the surface is uneven, support with an evenly leveled base.

3WJ Air Circuit breakers
10 Operating Instructions, 12/2022, L1V30828903001-01
Description
2
2.1 Mechanical components
2.1.1 Design
2.1.1.1 Circuit Breaker

Description
2.1 Mechanical components
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 11
(1) Arc chute
(12) Draw-out window
(2) Accessory label
(13) Position indicator
(3) Carrying handle
(14) Position for CASTELL lock
(4) Counting indicator
(15) Electronic trip unit (ETU)
(5) Store-energy spring indicator
(16) Mechanical OPEN button
(6) Type label
(17) Mechanical CLOSED button
(7) Ready-to-close indicator
(18) Breaker OPEN/CLOSED indicator
(8) Racking pictogram
(19) Reset button
(9) Spring charging lever
(20) Operator panel
(10) Breaker foot
(21) Secondary disconnect terminals
(11) Retractable shaft (only withdrawable version)

Description
2.1 Mechanical components
3WJ Air Circuit breakers
12 Operating Instructions, 12/2022, L1V30828903001-01
2.1.1.2 Guide frame
①Opening for crane hook
⑧Locking device for racking rail
②Crane hook label
⑨Racking rail
③Shutter (option)
⑩Locking device shutter (option)
④Type label
⑪Shutter lever (option)
⑤Ground connection
⑫Position signaling switch (option)
⑥Door locking provision (option)
⑬Sliding contact modules for secondary connection
⑦Rated-current coding at factory

Description
2.1 Mechanical components
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 13
2.1.2 Circuit Breaker identification
2.1.2.1 Accessory and rating label
Circuit Breaker accessory label (with terminal assignments)
①Order no. of the Circuit breaker
⑥Motor operating mechanism
②Supplement order no. of the further configured options
⑦Auxiliary contacts
③Shunt trip ST/F1 or electrical reclosing lockout
⑧Undervoltage release UVR F3/F8
④Closing coil/Y1
⑨Shunt trip ST2/F2
⑤Main conduction path

Description
2.1 Mechanical components
3WJ Air Circuit breakers
14 Operating Instructions, 12/2022, L1V30828903001-01
Circuit Breaker rating label
①Order no. of the Circuit breaker
⑧Country of production
②ID of the Circuit breaker
⑨Rated short-time withstand current
③Standards
⑩Rated short-circuit breaking capacity
④Utilization category
⑪Rated operational voltage
⑤Range of the rated frequency
⑫Rated impulse withstand voltage
⑥Approvals
⑬Rated insulation voltage
⑦Manufacturer
⑭Circuit breaker max. rated current

Description
2.1 Mechanical components
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 15
2.1.3 Indicators of the Circuit Breaker

Description
2.1 Mechanical components
3WJ Air Circuit breakers
16 Operating Instructions, 12/2022, L1V30828903001-01
2.1.4 Operation
2.1.4.1 Installation
WARNING
Risk of equipment damage and/or personal injury
Before installing the Circuit breaker, make sure that the minimum distances from insulated,
grounded, and live components in the switchgear are observed.
Details can be found in the chapter Technical specifications (Page 196).
Installation position
WARNING
Risk of equipment damage and/or personal injury
You must not install the withdrawable Circuit breaker tilted towards the frontside: The
Circuit breaker may slide out on the guiding rails, when racked in the disconnected position.

Description
2.1 Mechanical components
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 17
Installation on a horizontal surface
For fixed-mounted Circuit Breakers:
Supplied by customer: 4 x M8-8.8 bolts + strain washers
For withdrawable Circuit Breakers:
Supplied by customer: 4 x M8-8.8 bolts + nuts + washers
Arc chute cover
If several withdrawable Circuit Breakers are arranged one above the other in cubicles without
compartment bases, we recommend to use arc chute covers.
See chapter Arc chute cover (Page 144)

Description
2.1 Mechanical components
3WJ Air Circuit breakers
18 Operating Instructions, 12/2022, L1V30828903001-01
2.1.4.2 Racking the Circuit Breaker in or out
NOTICE
Material damage due to over-rotation of the racking handle
The withdrawable Circuit Breaker must only be racked once the operator panel has been
mounted and secured.
If a shutter is installed, a change of direction is not permitted while the Circuit Breaker is
being racked until a defined position has been reached (disconnected/test/connected
position).
Note
The indicator on the Circuit Breaker
- position latching is not provided.
The position can only be checked via the indicator on the Circuit Breaker.
Racking out
•Press the OPEN button and open the slide switch simultaneously.
•Insert crank handle and turn it to rack the Circuit breaker out.
•Rack into test position.
•Rack further into disconnected position.
•Remove crank handle and close the slide switch.
•Slide the guide rails out completely. Move the Circuit Breaker out of the guide frame.

Description
2.1 Mechanical components
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01 19
Racking in
•Slide the guide rails out completely.
•Move the Circuit Breaker back into the guide frame.
•Press the OPEN button and open the slide switch simultaneously.
•Insert crank handle and turn it to rack the Circuit breaker in. Rack into test position. Rack
further into connect position.