Siemens SENTRON 3WL10 Technical Document

EQUIPMENT MANUAL
www.siemens.com/SENTRON
Air Circuit Breaker 3WL10 & Molded Case Circuit Breaker 3VA27
Protection devices
07/2023Ausgabe
SENTRON

SENTRON
Protection devices
3VA27 molded case circuit
breakers & 3WL10 air circuit
breakers
Equipment Manual
10/2023
L1V30499596002-03
Introduction 1
Description 2
Accessories 3
Application planning 4
Connection and
commissioning 5
Operation 6
Service and maintenance 7
Technical speci󹪝cations 8
Dimension drawings 9
Circuit diagrams 10
Appendix A
ESD guidelines B
List of abbreviations C

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.
Quali󹪝ed Personnel
The product/system described in this documentation may be operated only by personnel quali󹪝ed for the speci󹪝c
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Quali󹪝ed 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 identi󹪝ed by ® are registered trademarks of SiemensAktiengesellschaft. 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.
Siemens Aktiengesellschaft
Smart Infrastructure
Electrical Products
Postfach 10 09 53
93009 Regensburg
GERMANY
L1V30499596002-03
Ⓟ 11/2023 Subject to change
Copyright © Siemens 2017.
All rights reserved

Table of contents
1 Introduction........................................................................................................................................... 9
1.1 About this documentation ................................................................................................... 9
1.2 Product-speci󹪝c information................................................................................................. 9
1.2.1 Target readers...................................................................................................................... 9
1.2.2 Technical Support ................................................................................................................ 9
1.3 Reference documents ........................................................................................................ 10
1.4 Advanced training courses ................................................................................................. 10
1.5 Safety instructions ............................................................................................................. 11
1.5.1 Open Source Software ....................................................................................................... 12
1.5.2 Transport........................................................................................................................... 13
2 Description........................................................................................................................................... 15
2.1 Current-carrying 3WL10 circuit breakers ............................................................................. 15
2.2 Current-limiting 3VA27 molded case circuit breakers .......................................................... 15
2.3 Advantages of the platform approach................................................................................. 15
2.4 Overview - applications and portfolio ................................................................................. 16
2.5 Basic properties of the circuit breaker (3WL10 / 3VA27) ...................................................... 16
2.6 Applications....................................................................................................................... 20
2.7 Possible uses and portfolio................................................................................................. 22
2.7.1 Portfolio of 3WL10 air circuit breakers ................................................................................ 24
2.7.2 Portfolio of 3VA27 molded case circuit breakers.................................................................. 25
2.7.3 Electronic trip unit (ETU) .................................................................................................... 25
2.7.4 3VA27 / 3WL10 for motor protection applications ............................................................... 26
2.8 Basic unit........................................................................................................................... 30
2.8.1 Product and mounting versions.......................................................................................... 30
2.8.2 Design of the circuit breaker............................................................................................... 31
2.8.3 Withdrawable breaker ........................................................................................................ 31
2.8.4 Technical overview............................................................................................................. 34
2.8.5 Circuit breaker identi󹪝cation............................................................................................... 39
2.9 Electronic trip unit ETU....................................................................................................... 43
2.9.1 Description of functions..................................................................................................... 43
2.9.2 Selectivity.......................................................................................................................... 46
2.9.3 Design of the electronic trip units....................................................................................... 48
2.9.3.1 Electronic trip units of the 3-series ..................................................................................... 48
2.9.3.2 Electronic trip units of the 6-series ..................................................................................... 49
2.9.4 Characteristics of the ETU................................................................................................... 51
2.9.4.1 Characteristic curves .......................................................................................................... 60
2.9.4.2 Features and options ......................................................................................................... 63
2.9.5 Parameters of the trip units................................................................................................ 66
2.9.5.1 Metering functions ............................................................................................................ 76
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 3

2.10 Communication ................................................................................................................. 80
2.11 Accessories overview ......................................................................................................... 83
3 Accessories .......................................................................................................................................... 85
3.1 Accessories for connection and insulation .......................................................................... 87
3.1.1 Insulating measures........................................................................................................... 87
3.1.2 Connections of the 󹪝xed breaker version ............................................................................ 89
3.1.3 Connections of the withdrawable breaker version............................................................... 92
3.2 Electromechanical accessories............................................................................................ 94
3.2.1 Auxiliary releases for 3VA27 / 3WL10.................................................................................. 94
3.2.2 Accessories for circuit breakers........................................................................................... 97
3.2.3 Auxiliary, alarm, and signaling switches ........................................................................... 100
3.3 Accessories for communication link, remote switching, and I/O modules........................... 106
3.4 Rotary operators .............................................................................................................. 109
3.4.1 Door mounted rotary operator ......................................................................................... 109
3.4.2 Front mounted rotary operator......................................................................................... 111
3.5 External accessories ......................................................................................................... 112
3.5.1 External digital I/O module IOM300.................................................................................. 112
3.5.2 Description ...................................................................................................................... 112
3.5.3 External current transformers........................................................................................... 113
3.5.3.1 Rogowski CT solo external neutral .................................................................................... 113
3.5.3.2 External CT for grounding conductors of the main power supply (grounded transformer
star point) G_ret using the ground fault return ................................................................. 114
3.5.3.3 Summation current transformer Rc CT.............................................................................. 115
3.5.4 Locking and interlocking .................................................................................................. 115
3.5.5 Support for 󹪞oor 󹪝xation (󹪝xed breaker) ........................................................................... 123
3.6 Breaker Data Adapters and test devices............................................................................. 124
3.6.1 Overview......................................................................................................................... 124
3.6.2 TD310 Activation & Trip Box ............................................................................................. 125
3.6.3 TD410 Breaker Data Adapter ............................................................................................ 125
3.6.4 TD420 test device ............................................................................................................ 126
4 Application planning ......................................................................................................................... 129
4.1 Types of installation and installation locations .................................................................. 129
4.1.1 Mounting position ........................................................................................................... 129
4.1.2 Degree of protection ........................................................................................................ 132
4.1.3 Power loss ....................................................................................................................... 132
4.1.4 Ambient conditions.......................................................................................................... 132
4.1.5 Current reduction ............................................................................................................ 133
4.1.5.1 Current reduction depending on the ambient temperature on the 3WL10......................... 133
4.1.5.2 Current reduction depending on the ambient temperature on the 3VA27 ......................... 134
4.1.6 Use in IT systems ............................................................................................................. 137
4.1.7 Electromagnetic compatibility .......................................................................................... 138
4.1.8 Installation in the switchboard ......................................................................................... 138
4.2 Power supply, grounding, and connection ........................................................................ 140
4.2.1 Power supply, grounding, and connection ........................................................................ 142
4.2.2 Isolating distances and insulating equipment ................................................................... 147
4.2.3 Armature plates ............................................................................................................... 149
Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
4Equipment Manual, 10/2023, L1V30499596002-03

4.3 Communication planning................................................................................................. 150
5 Connection and commissioning ........................................................................................................ 153
5.1 Safety regulations and information................................................................................... 153
5.2 Mounting and connecting the device ............................................................................... 154
5.2.1 Tightening torques at a glance ......................................................................................... 154
5.2.2 Mounting connections ..................................................................................................... 155
5.2.3 Fixed breaker: Installing the circuit breaker ....................................................................... 162
5.2.4 Withdrawable breaker: Installing the circuit breaker / guide frame..................................... 164
5.3 Mounting accessories ...................................................................................................... 167
5.3.1 Installing accessories........................................................................................................ 167
5.3.2 Examples of mounting internal accessories....................................................................... 174
5.4 Function test of the ETU................................................................................................... 177
5.5 Commissioning................................................................................................................ 178
5.5.1 General tests ................................................................................................................... 178
5.5.2 Procedure for testing the accessories................................................................................ 180
5.5.3 Final tests ........................................................................................................................ 182
6 Operation........................................................................................................................................... 183
6.1 Operation ........................................................................................................................ 183
6.1.1 Opening and closing ........................................................................................................ 183
6.1.2 Entering parameters ........................................................................................................ 185
6.1.3 Racking the circuit breaker (withdrawable breaker)........................................................... 188
6.2 Alarms............................................................................................................................. 191
6.3 Troubleshooting............................................................................................................... 196
7 Service and maintenance .................................................................................................................. 199
7.1 Safety regulations ............................................................................................................ 199
7.2 Tests during inspections and after tripping ....................................................................... 200
7.3 Maintenance intervals...................................................................................................... 200
7.4 Enclosure, terminals, and control panel............................................................................ 201
7.4.1 Checking and cleaning the housing.................................................................................. 201
7.5 Basic unit and accessories ................................................................................................ 202
7.5.1 Removing the front plate and accessories ......................................................................... 202
7.5.2 Cleaning and lubricating the tripping mechanism............................................................. 203
7.5.3 Inspecting the accessories................................................................................................ 203
7.5.4 Testing the ETU................................................................................................................ 204
7.6 Final tests ........................................................................................................................ 204
8 Technical speci󹪝cations ..................................................................................................................... 207
8.1 Technical data 3WL10 ...................................................................................................... 207
8.2 Technical speci󹪝cations - 3VA27 ....................................................................................... 207
9 Dimension drawings.......................................................................................................................... 209
9.1 Fixed-mounted breaker .................................................................................................... 209
9.1.1 Circuit breaker without connections ................................................................................. 209
Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 5

9.1.2 Front terminals for main circuit connection ...................................................................... 210
9.1.3 Front terminals for main circuit connection, extended ...................................................... 211
9.1.4 Front connection bars, broadened.................................................................................... 212
9.1.5 Horizontally / vertically orientable rear connection............................................................ 213
9.1.6 Circular conductor terminal, adapter 4x240...................................................................... 215
9.1.7 Switchboard panel, hole and drilling templates, 󹪝xed breaker ........................................... 216
9.1.8 Fixed-mounted version with mounting support ................................................................ 219
9.2 Withdrawable breaker ...................................................................................................... 220
9.2.1 Circuit breaker without connections ................................................................................. 220
9.2.2 Horizontally / vertically orientable rear terminal for main circuit connection ...................... 221
9.2.3 Copper/aluminum cable connection bar ........................................................................... 222
9.2.4 Front extended terminal................................................................................................... 223
9.2.5 Front connection bars, broadened.................................................................................... 224
9.2.6 Rear connection bars, broadened ..................................................................................... 225
9.2.7 Switchboard panel, hole and drilling templates, withdrawable breaker.............................. 226
9.3 Further dimension drawings ............................................................................................ 229
9.3.1 Phase barrier.................................................................................................................... 229
9.3.2 Door covers ..................................................................................................................... 229
9.3.3 Terminal cover ................................................................................................................. 230
10 Circuit diagrams................................................................................................................................. 231
10.1 Circuit diagrams of accessories......................................................................................... 238
10.1.1 Tripped signaling switch (S24) ......................................................................................... 238
10.1.2 Spring charging motor (MO), spring charged signaling switch (S21), remote reset magnet
(RR) ................................................................................................................................. 238
10.1.3 Tripped signaling switch, toggle operating mechanism MCCB (TAS) .................................. 239
10.1.4 Leading changeover switch (S26)..................................................................................... 239
10.1.5 CT for grounded transformer star point (G_ret)................................................................. 240
10.1.6 Summation current transformer (Rc CT) ........................................................................... 240
10.1.7 CB bus module................................................................................................................. 241
10.1.8 External I/O module IOM300 ............................................................................................ 242
10.1.9 External current transformer for N conductor, for 3-pole circuit breakers only.................... 243
10.1.10 Tripped signaling switch via auxiliary release (S25)........................................................... 244
10.1.11 Ready-to-close signaling switch (RTC)............................................................................... 244
10.1.12 Undervoltage release / shunt release (UVR / ST2) .............................................................. 244
10.1.13 Time-delay device for UVR (external monitoring of UVR can be mounted on the DIN rail)... 245
10.1.14 Closing coil (CC) / shunt release (ST) / actuator module (COM ACT) ................................... 245
10.1.15 Auxiliary switch AUX........................................................................................................ 246
10.1.16 Auxiliary switch AUX 15, external..................................................................................... 247
10.1.17 Optional voltage input, external neutral for the metering function of a 3-pole circuit
breaker ............................................................................................................................ 247
10.1.18 Position signaling switch PSS for guide frame ................................................................... 248
A Appendix............................................................................................................................................ 249
A.1 The article number system............................................................................................... 249
A.2 Menu structure of the ETUs of the 6-series ....................................................................... 254
B ESD guidelines ................................................................................................................................... 265
B.1 Electrostatic sensitive devices (ESD) ................................................................................. 265
Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
6Equipment Manual, 10/2023, L1V30499596002-03

C List of abbreviations .......................................................................................................................... 267
C.1 Table of abbreviations ...................................................................................................... 267
Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 7

Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
8Equipment Manual, 10/2023, L1V30499596002-03

Introduction 1
1.1 About this documentation
Circuit breaker
The circuit breaker is an integral part of an economically e󹪟cient, safe and reliable power
distribution system that is designed to protect personnel and material assets. The platform
device that is described below is available as a variant of the 3WL10 air circuit breaker (ACB) and
the 3VA27 molded case circuit breaker (MCCB).
Scope of validity of this document
This manual is a reference manual for technical information that users will need to con󹪝gure,
connect, and operate the 3WL10 / 3VA27 circuit breaker and its accessories 3VW8/9.
1.2 Product-speci󹪝c information
1.2.1 Target readers
Target readers of this documentation
The information contained in this manual is provided for the bene󹪝t of:
• Users
• Control cabinet manufacturers
• Switchgear manufacturers
• Maintenance personnel
1.2.2 Technical Support
You can 󹪝nd further support on the Internet at:
TechnicalSupport (https://www.siemens.com/support-request)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 9

1.3 Reference documents
Further documents
You will 󹪝nd further details in the following documents:
Table 1-1 Reference documents
Title 
Catalog LV 10 - Low-Voltage Power Distribution and Electrical Installation
Technology
@ (https://
support.industry.siemens.com/cs/ww/en/view/
109482234)
Communication Manual - 3VA27 Molded Case Circuit Breakers & 3WL10 Air
Circuit Breakers
@ (https://
support.industry.siemens.com/cs/ww/en/view/
109760220)
Con󹪝guration Manual - Selectivity for 3VA Molded Case Circuit Breakers @ (https://
support.industry.siemens.com/cs/ww/en/view/
109743975)
Selectivity Tables - Low-Voltage Protection Devices @ (https://
support.industry.siemens.com/cs/ww/en/view/
109748621)
System Manual - 3VA Molded Case Circuit Breaker Communication @ (https://
support.industry.siemens.com/cs/ww/en/view/
98746267)
Operating Instructions - 3WL10 Air Circuit Breakers, Fixed-Mounted @ (https://
support.industry.siemens.com/cs/ww/en/view/
109748199)
Operating Instructions - 3WL10 Air Circuit Breakers, Withdrawable @ (https://
support.industry.siemens.com/cs/ww/en/view/
109748198)
Operating Instructions - 3VA27 Circuit Breakers, Fixed-Mounted @ (https://
support.industry.siemens.com/cs/ww/en/view/
109748313)
Operating Instructions - 3VA27 Circuit Breakers, Withdrawable @ (https://
support.industry.siemens.com/cs/ww/en/view/
109748314)
Hartmut Kiank, Wolfgang Fruth:
Planning Guide for Power Distribution Plants, Publicis Publishing
ISBN: A19100-L531-B115
Switching, Protection and Distribution in Low-Voltage Networks, substan‐
tially 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
1.4 Advanced training courses
Find out about regional training courses on o󹪜er via the following link.
Training for Industry (https://www.siemens.com/sitrain-lowvoltage)
Introduction
1.4Advanced training courses
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
10 Equipment Manual, 10/2023, L1V30499596002-03

Here you can choose from:
• Web-based training courses (online, informative, free)
• Classroom training courses (course attendance, comprehensive, subject to fee)
If the correct training course is not shown, you can also get information from your local sales
representative.
1.5 Safety instructions
DANGER
Hazardous voltage
Results in death, serious injury or irreparable damage to material / property.
Only quali󹪝ed personnel who have been instructed in the warnings and safety instructions and
the maintenance rules must ever work on the device.
Successful and safe functioning of this device depends on proper installation, operation,
handling, and maintenance.
WARNING
Improper installation, commissioning, and maintenance
Safe operation of the circuit breaker can only be ensured if it is installed, commissioned, and
maintained properly by quali󹪝ed personnel, observing the warnings provided in these
operating instructions.
In particular, both the general installation and safety instructions for work on power-current
installations (e.g. DIN VDE) and the rules prescribing proper use of lifting equipment and tools
and use of personal protective equipment (goggles etc.) must be followed.
If these are not observed, this can result in death, severe injury, or substantial material damage.
Quali󹪝ed personnel
A quali󹪝ed person for the purpose of this documentation is a person who is familiar with
assembling, installing, commissioning, and operating the product and who has the relevant
quali󹪝cations, such as:
• Training or instruction/authorization to close and open, ground, and tag circuits and devices
and systems according to the safety standards.
• Training / instruction in the proper care and use of protective equipment in accordance with
established safety procedures.
• Training in 󹪝rst aid.
Ambient conditions
The circuit breakers are designed to be operated in enclosed rooms in which the operating
conditions are not a󹪜ected by dust or corrosive vapors/gases. Suitable enclosures must
Introduction
1.5Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 11

be used in dusty or damp conditions. You will 󹪝nd further ambient conditions in Chapter
Application planning (Page129).
Standards
The circuit breaker complies with the standards:
• IEC 60947-2
• IEC60947-3
• EN60947-2
• EN60947-3
Safety instructions
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 only form 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. 󹪝rewalls and/or network segmentation)
are in place.
For additional information on industrial security measures that may be implemented, please
visit (http://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 (http://www.siemens.com/industrialsecurity).
1.5.1 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 de󹪝nition of the
applicable license, and if use of the corresponding object 󹪝le 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
Introduction
1.5Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
12 Equipment Manual, 10/2023, L1V30499596002-03

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 modi󹪝ed versions of the LGPL Licensed Module, and
(ii) you may reverse-engineer the Combined Product, but only to debug your modi󹪝cations.
The modi󹪝cation right does not include the right to distribute such modi󹪝cations and you
shall maintain in con󹪝dence any information resulting from such reverse-engineering of a
Combined Product.
Certain OSS licenses require SIEMENS to make source code available, for example, the GNU
General Public License, the GNU Lesser General Public License and the Mozilla Public License.
If such licenses are applicable and this Product is not shipped with the required source code,
a copy of this source code can be obtained by anyone in receipt of this information during
the period required by the applicable OSS licenses by contacting the following address:
Siemens AG
Smart Infrastructure
Electrical Products
Technical Support
Postfach 10 09 53
93009 Regensburg
Germany
You will 󹪝nd Technical Support under (https://www.siemens.com/support-request).
Keyword: Open Source Request (please specify Product name and version, if applicable)
SIEMENS may charge a handling fee of up to 5 EUR to ful󹪝l the request.
Warranty regarding further use of the Open Source Software
SIEMENS' warranty obligations are set forth in your agreement with SIEMENS. SIEMENS does
not provide any warranty or technical support for this Product or any OSS components
contained in it if they are modi󹪝ed or used in any manner not speci󹪝ed by SIEMENS.
The license conditions may contain disclaimers that apply between you and the respective
licensor. For the avoidance of doubt, SIEMENS does not make any warranty commitment
on behalf of or binding upon any third-party licensor. The Open Source Software used
in the product and the license agreements concerning this software can be found in the
Readme_OSS.
1.5.2 Transport
Transport
Unpack the circuit breaker or the guide frame when it is delivered and examine it for damage in
transit. Notify the carrier immediately if any damage in transit is found.
If the circuit breaker or the guide frame will not be installed until later, store it in its original
packaging. Always use the original packaging for onward shipping.
Introduction
1.5Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 13

If the circuit breaker is delivered in seaworthy packaging, check the color of the moisture
label:
• Blue: Moisture-tight packaging is e󹪜ective
• Pink: Moisture-tight packaging is ine󹪜ective.
Inspect the circuit breaker for corrosion damage and report the damage to the carrier.
Replace or dry the desiccants and weld the plastic 󹪝lm. Inspect the packaging at regular
intervals.
Handling
NOTICE
Damage due to incorrect setting down
The circuit breaker and the guide frame must not be set down on their rear side nor on the
terminals of their main circuit connection after removal from the packaging, unless the suitably
shaped wooden board provided has 󹪝rst been placed underneath.
After unpacking, stand the circuit breaker vertically on its underside or lay it horizontally on its
side.
The circuit breaker and the guide frame are shipped together in one packing unit. The circuit
breaker and guide frame are next to each other in the packaging. The circuit breaker can
be removed from the packaging and transported by one person, as can the guide frame.
Equipment, such as a crane, etc. is not required.
Introduction
1.5Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
14 Equipment Manual, 10/2023, L1V30499596002-03

Description 2
2.1 Current-carrying 3WL10 circuit breakers
Air circuit breakers of the 3WL range are designed as current-carrying circuit breakers. Their
place in the power distribution is upstream of molded case circuit breakers and they must have
time-selective current-carrying characteristics. They are equipped with ST releases for short-
time-delayed short-circuit protection. The INST release for instantaneous short-circuit
protection can be disabled in certain circumstances.
The air circuit breakers can carry the full short-circuit current for a certain duration without
the contacts lifting and limiting the short-circuit current. This gives lower-level devices
enough time to disconnect the outgoing feeder with the fault. These are the positive
characteristics of a protection device that is most frequently used near to the incoming
feeder and that, like the 3WL10 air circuit breaker, is time-selective and current-carrying in
the event of a fault.
2.2 Current-limiting 3VA27 molded case circuit breakers
"Current limiting" means that the peak value of the prospective impulse short-circuit current ip is
limited to a smaller let-through current iD. E󹪜ective current limitation means that the circuit
breakers and busbar trunking systems can be constructed more compactly. In the event of a
short-circuit, the molded case circuit breaker substantially reduces the magnitude of the let-
through currents, i.e. reduces the load reaching downstream equipment (less thermal load,
lower dynamic forces). The let-through energy is also signi󹪝cantly reduced. 3VAmolded case
circuit breakers are designed to be current limiting. IECEN60947-2(VDE0660-101),
section 2.3, page 12, de󹪝nes current-limiting molded case circuit breakers in the following way:
"Circuit breaker that, within a speci󹪝ed range of current, prevents the let-through current
from reaching the prospective peak value and which limits the let-through energy (I2t) to a
value less than the let-through energy of a half-cycle wave of the symmetrical prospective
current."
These are the positive characteristics of a protection device that is most frequently used
on the outgoing side and that, like the 3VA27 molded case circuit breaker, is dynamically
selective and current limiting in the event of a fault.
2.3 Advantages of the platform approach
This product platform (ACB/MCCB) provides users with a selection of product variants depending
on their requirements whereas the accessories, electronic trip units, electronics, connections,
and outer dimensions are mainly the same.
This is made possible by the modular design of the contact system inside the product.
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 15

The user or plant constructor does still have to perform integration tests, but the physical
design and the system of accessories remain largely intact.
2.4 Overview - applications and portfolio
This chapter provides an overview of the circuit breakers and describes the potential areas of
application for di󹪜erent circuit breaker models.
The topics discussed in this chapter are listed below:
• Applications and possible uses
• Portfolio
• Possible con󹪝gurations
• Detailed information about applications and possible uses
• Technical speci󹪝cations
• Molded case circuit breakers and accessories in the system
2.5 Basic properties of the circuit breaker (3WL10 / 3VA27)
• Choice between two ranges of electronic trip units with a number of equipment versions:
– Electronic trip units (ETUs) of the 3-series with rotary coding switches
– Electronic trip units (ETUs) of the 6-series with LC display for additional settings and
functions for enhanced requirements (communication and metering function)
• Variable and versatile connections with identical dimensions (3WL10 / 3VA27)
• Options for integration into switchboards complying with IEC61439‑2
• Optional expansion with a wide range of internal and external accessories
• Integrated communication concept together with the other 3VA molded case circuit
breakers, the 3WL, and the 7KM PAC measuring devices. Option of direct integration into the
Siemens communication environment via optional accessories (with ETUs of the 6-series):
– Communications modules (Plug & Play) for PROFIBUS DP, PROFINET IO, Modbus TCP, and
ModbusRTU
– I/O modules
– Modules with expanded metering functions for e󹪟cient energy management
• Integration of the circuit breaker into the Totally Integrated Power (TIP) solutions is possible
• Integration into the SENTRON software environment, including powercon󹪝g and
powermanager
Support by CAx 󹪝les and Siemens tools simpli󹪝es planning and integration of the circuit
breaker into the overall installation.
Description
2.5Basic properties of the circuit breaker (3WL10 / 3VA27)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
16 Equipment Manual, 10/2023, L1V30499596002-03

3WL10 air circuit breaker
The 3WL10 air circuit breaker is a current-carrying circuit breaker with IEC certi󹪝cation (3WL1)
and is an addition to the existing 3WL1 IEC portfolio. It has the following characteristics:
• Frame size 0 (FS 0) with a rated current In of 630A to 1250A
• Optionally available either as a 󹪝xed-mounted version or as a withdrawable version
• An especially high Icw value (up to 50kA 1s) and Icu value (up to 66 kA @440 V)
3VA27 molded case circuit breaker
The 3VA27 molded case circuit breaker is a current-limiting circuit breaker with IEC certi󹪝cation
and is an addition to the existing 3VAIECportfolio. It has the following characteristics:
• Frame size 1600A with a rated current In of 800A to 1600A
• Choice of two designs:
– as a handle operating mechanism, e.g. as an additional manual operating mechanism
– as a stored energy mechanism for integration of internal spring charging motors (external
dimensions are not a󹪜ected by this)
• Optionally available either as a 󹪝xed-mounted version or as a withdrawable version
• An especially high Icu value (up to 110kA @415V) and Icw value (20kA 1s)
Description
2.5Basic properties of the circuit breaker (3WL10 / 3VA27)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 17

Features
The circuit breakers meet the following requirements:
• High breaking capacity
• Selective protective response
• Optional integrated metering function with internal voltage tap and expansion module
metering functionBasic / metering functionAdvanced (with electronic trip units of the 6-
series)
• Connection to a 󹪝eldbus communication system or Ethernet-based IP communication (with
electronic trip units of the 6-series)
The most important features of the circuit breaker are:
Feature Air circuit breaker
3WL10
Molded case circuit breaker
3VA27
Compact dimensions ✓ ✓
Rated current In630 / 800 / 1000 / 1250A 800 / 1000 / 1250 / 1600A
Breaking capacity classes 42 kA, 55 kA, and 66kA
(Icu at 440V)
55 kA, 85kA, and 110kA
(Icu at 415V)
Fixed-mounted ✓ ✓
Withdrawable ✓ ✓
Handle operating mechanism — Optional
Stored energy mechanism ✓ Optional
Electronic trip units 3-series / 6-series 3-series / 6-series
Direct communication link to the device without an in‐
termediate gateway. Various bus systems are available
(optionally for electronic trip units of the 6-series)
✓ ✓
Use in AC applications ✓ ✓
Direct communication link to various bus systems of the
device (optionally for electronic trip units of the 6-series)
✓ ✓
No derating of the circuit breaker up to +70 °C in accord‐
ance with IEC60947‑2
✓ —
Modular and easy-to-󹪝t accessories ✓ ✓
Connections that can be retro󹪝tted by the user. Its orien‐
tation is modular or rotatable for subsequent modi󹪝ca‐
tion.
✓ ✓
Description
2.5Basic properties of the circuit breaker (3WL10 / 3VA27)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
18 Equipment Manual, 10/2023, L1V30499596002-03

Bene󹪝ts
The circuit breaker provides many di󹪜erent advantages:
• Low space requirements
The 3WL10 circuit breakers are extremely compact. 3‑pole and 4‑pole devices of size 0 󹪝t into
a 400 mm wide switchboard panel. Two 3‑pole 3WL10 circuit breakers can also be installed
side by side in a 600mm wide switchboard panel.
The 󹪞exibly mountable connections and installation options of the device enable a
considerable amount of space to be saved in the switchboard. For example, due to the
possibility of mounting the bar 󹪞at terminals directly on the front and positioning the device
on the rear in wall-mounted con󹪝guration, which is unusual for an air circuit breaker.
The 3VA27 molded case circuit breakers provide a compact solution up to 1600 A. A spring
charging motor and/or a metering function can optionally be integrated in the device.
• Highly modular design
Components such as auxiliary releases, spring charging motors, electronic trip units, external
current sensors, auxiliary circuit signaling switches, automatic reset devices, and interlocks
can all be exchanged or retro󹪝tted at a later stage, thus allowing the circuit breaker to be
adapted to new, changing requirements.
•Retro󹪝ttable functions for electronic trip units (ETUs)
Upgrading the electronic trip units is possible at any time. This is done simply by replacing the
ETU. For example, the residual current protection (Rc) can be added by replacing the rating
plug in the ETU660.
Rating plugs, the metering function, and communications modules for the electronic trip
units are available for fast and easy retro󹪝tting and adaptation to changing requirements.
Subsequent upgrading of the ETUs of the 3-series to the ETUs of the 6-series is possible.
• Flexible communication / metering function
The use of modern communication-capable circuit breakers opens up completely new
possibilities in terms of startup, parameterization, diagnostics, plant transparency,
maintenance and operation. This allows many di󹪜erent ways of reducing costs and
improving productivity in industrial plants, buildings and infrastructure projects to be
achieved:
– Simultaneous use of up to two di󹪜erent bus systems, such as PROFIBUS, PROFINET,
ModbusTCP, or ModbusRTU
– Fast and reliable parameterization
– Timely information and response can prevent plant stoppages
–E󹪜ective diagnostics management
– Measured values are the basis for e󹪟cient load management, for drawing up power
demand pro󹪝les, and for allocating energy to cost centers
– Preventive maintenance reduces the risk of expensive plant downtimes
– Metering function with a wide range of measured values, such as current, voltage,
energy, power
– The metering function picked o󹪜 inside the circuit breaker enables a small space
requirement, reduced wiring work, the omission of external voltage transformers and
therefore an additional cost reduction.
Description
2.5Basic properties of the circuit breaker (3WL10 / 3VA27)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 19