Siemens SENTRON 3WL10 User manual

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SENTRON
Protection devices
3VA27 molded case circuit breakers
& 3WL10 air circuit breakers
Manual
10/2018
L1V30499596002
-01
Introduction
1
Description
2
Accessories
3
Application planning
4
Connection and
commissioning
5
Operation
6
Service and maintenance
7
Technical specifications
8
Dimension drawings
9
Circuit diagrams
10
Appendix
A
ESD guidelines
B
List of abbreviations
C

Siemens AG
Division Energy Management
Postfach 32 20
91050 ERLANGEN
GERMANY
Document order number: 3ZW1012-0WL10-0AC1
Ⓟ
10/2018 Subject to change
Copyright © Siemens AG 2017.
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.

3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 3
Table of contents
1 Introduction............................................................................................................................................. 9
1.1 About this documentation .........................................................................................................9
1.2 Product-specific information .....................................................................................................9
1.3 Reference documents.............................................................................................................10
1.4 Advanced training courses .....................................................................................................11
1.5 Safety instructions...................................................................................................................11
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 Possible uses and portfolio.....................................................................................................21
2.6.1 Portfolio of 3WL10 air circuit breakers....................................................................................23
2.6.2 Portfolio of 3VA27 molded case circuit breakers....................................................................24
2.6.3 Electronic trip unit (ETU).........................................................................................................25
2.6.4 3VA27 / 3WL10 for motor protection applications ..................................................................26
2.7 Basic unit ................................................................................................................................31
2.7.1 Product and mounting versions ..............................................................................................31
2.7.2 Design of the circuit breaker ...................................................................................................32
2.7.3 Withdrawable breaker .............................................................................................................33
2.7.4 Technical overview .................................................................................................................36
2.7.5 Circuit breaker identification ...................................................................................................43
2.8 Electronic trip unit ETU ...........................................................................................................46
2.8.1 Description of functions...........................................................................................................47
2.8.2 Selectivity................................................................................................................................49
2.8.3 Design of the electronic trip units............................................................................................52
2.8.3.1 Electronic trip units of the 3-series..........................................................................................52
2.8.3.2 Electronic trip units of the 6-series..........................................................................................53
2.8.4 Characteristics of the ETU ......................................................................................................55
2.8.4.1 Characteristic curves ..............................................................................................................
66
2.8.4.2 Features and options ..............................................................................................................69
2.8.5 Parameters of the trip units.....................................................................................................72
2.8.5.1 Metering functions...................................................................................................................81
2.9 Communication .......................................................................................................................85
2.10 Accessories overview .............................................................................................................89

Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
4Manual, 10/2018, L1V30499596002-01
3 Accessories .......................................................................................................................................... 91
3.1 Accessories for connection and insulation............................................................................. 93
3.1.1 Insulating measures ............................................................................................................... 93
3.1.2 Connections of the fixed breaker version .............................................................................. 95
3.1.3 Connections of the withdrawable breaker version ................................................................. 97
3.2 Electromechanical accessories.............................................................................................. 99
3.2.1 Auxiliary releases for 3VA27 / 3WL10 ................................................................................... 99
3.2.2 Accessories for circuit breakers ........................................................................................... 102
3.2.3 Auxiliary, alarm, and signaling switches .............................................................................. 105
3.3 Accessories for communication link, remote switching, and I/O modules ........................... 111
3.4 Rotary operators .................................................................................................................. 114
3.4.1 Door mounted rotary operator.............................................................................................. 114
3.4.2 Front mounted rotary operator ............................................................................................. 116
3.5 External accessories ............................................................................................................ 117
3.5.1 External digital I/O module IOM300 ..................................................................................... 117
3.5.2 DSP800 display.................................................................................................................... 118
3.5.3 External current transformers .............................................................................................. 119
3.5.3.1 Rogowski CT solo external neutral ...................................................................................... 119
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 ..................................................................... 120
3.5.3.3 Summation current transformer Rc CT................................................................................ 120
3.5.4 Locking and interlocking ...................................................................................................... 121
3.5.5 Support for floor fixation (fixed breaker) .............................................................................. 130
3.6 Breaker Data Adapters and test devices ............................................................................. 131
3.6.1 Overview .............................................................................................................................. 131
3.6.2 TD310 Activation & Trip Box................................................................................................ 132
3.6.3 TD410 Breaker Data Adapter .............................................................................................. 133
3.6.4 TD420 test device ................................................................................................................ 134
4 Application planning.............................................................................................................................137
4.1 Types of installation and installation locations..................................................................... 137
4.1.1 Mounting position ................................................................................................................. 138
4.1.2 Degree of protection ............................................................................................................ 140
4.1.3 Power loss............................................................................................................................ 141
4.1.4 Ambient conditions............................................................................................................... 141
4.1.5 Current reduction ................................................................................................................. 142
4.1.5.1 Current reduction depending on the ambient temperature on the 3WL10 .......................... 142
4.1.5.2 Current reduction depending on the ambient temperature on the 3VA27 ........................... 143
4.1.6 Use in IT systems................................................................................................................. 146
4.1.7 Electromagnetic compatibility .............................................................................................. 147
4.1.8 Installation in the switchboard.............................................................................................. 147
4.2 Power supply, grounding, and connection........................................................................... 150
4.2.1 Power supply, grounding, and connection........................................................................... 151
4.2.2 Isolating distances and insulating equipment ...................................................................... 156
4.2.3 Armature plates.................................................................................................................... 159
4.3 Communication planning ..................................................................................................... 160

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3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 5
5 Connection and commissioning........................................................................................................... 163
5.1 Safety regulations and information .......................................................................................163
5.2 Mounting and connecting the device ....................................................................................164
5.2.1 Tightening torques at a glance .............................................................................................164
5.2.2 Mounting connections ...........................................................................................................165
5.2.3 Fixed breaker: Installing the circuit breaker ..........................................................................172
5.2.4 Withdrawable breaker: Installing the circuit breaker / guide frame.......................................174
5.3 Mounting accessories ...........................................................................................................177
5.3.1 Installing accessories............................................................................................................177
5.3.2 Examples of mounting internal accessories .........................................................................184
5.4 Function test of the ETU .......................................................................................................187
5.5 Commissioning .....................................................................................................................189
5.5.1 General tests.........................................................................................................................189
5.5.2 Procedure for testing the accessories ..................................................................................191
5.5.3 Final tests..............................................................................................................................193
6 Operation............................................................................................................................................ 195
6.1 Operation ..............................................................................................................................195
6.1.1 Closing and opening manually..............................................................................................195
6.1.2 Entering parameters .............................................................................................................197
6.1.3 Racking the circuit breaker (withdrawable breaker) .............................................................200
6.2 Alarms ...................................................................................................................................203
6.3 Troubleshooting ....................................................................................................................209
7 Service and maintenance.................................................................................................................... 211
7.1 Safety regulations .................................................................................................................211
7.2 Tests during inspections and after tripping...........................................................................212
7.3 Maintenance intervals ...........................................................................................................212
7.4 Enclosure, terminals, and control panel................................................................................213
7.4.1 Checking and cleaning the housing......................................................................................213
7.5 Basic unit and accessories ...................................................................................................214
7.5.1 Removing the front plate and accessories............................................................................214
7.5.2 Cleaning and lubricating the tripping mechanism.................................................................215
7.5.3 Inspecting the accessories ...................................................................................................215
7.5.4 Testing the ETU ....................................................................................................................216
7.6 Final tests..............................................................................................................................217
8 Technical specifications ...................................................................................................................... 219
8.1 Technical data 3WL10 ..........................................................................................................219
8.2 Technical specifications - 3VA27..........................................................................................220

Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
6Manual, 10/2018, L1V30499596002-01
9 Dimension drawings.............................................................................................................................221
9.1 Fixed-mounted breaker........................................................................................................ 221
9.1.1 Circuit breaker without connections ..................................................................................... 221
9.1.2 Front terminals for main circuit connection .......................................................................... 222
9.1.3 Front terminals for main circuit connection, extended ......................................................... 223
9.1.4 Front connection bars, broadened ....................................................................................... 224
9.1.5 Horizontally / vertically orientable rear connection .............................................................. 225
9.1.6 Circular conductor terminal, adapter 4x240 ......................................................................... 227
9.1.7 Switchboard panel, hole and drilling templates, fixed breaker ............................................ 228
9.1.8 Fixed-mounted version with mounting support .................................................................... 231
9.2 Withdrawable breaker .......................................................................................................... 232
9.2.1 Circuit breaker without connections ..................................................................................... 232
9.2.2 Horizontally / vertically orientable rear terminal for main circuit connection ........................ 233
9.2.3 Copper/aluminum cable connection bar .............................................................................. 234
9.2.4 Front extended terminal ....................................................................................................... 236
9.2.5 Front connection bars, broadened ....................................................................................... 237
9.2.6 Rear connection bars, broadened........................................................................................ 238
9.2.7 Switchboard panel, hole and drilling templates, withdrawable breaker ............................... 239
9.3 Further dimension drawings................................................................................................. 242
9.3.1 Phase barrier........................................................................................................................ 242
9.3.2 Door covers.......................................................................................................................... 242
9.3.3 Terminal cover ..................................................................................................................... 243
10 Circuit diagrams...................................................................................................................................245
10.1 Circuit diagrams of accessories ........................................................................................... 252
10.1.1 Tripped signaling switch (S24)............................................................................................. 252
10.1.2 Spring charging motor (MO), spring charged signaling switch (S21), remote reset
magnet (RR)......................................................................................................................... 253
10.1.3 Tripped signaling switch, toggle operating mechanism MCCB (TAS) ................................. 253
10.1.4 Leading changeover switch (S26)........................................................................................ 254
10.1.5 CT for grounded transformer star point (G_ret) ................................................................... 254
10.1.6 Summation current transformer (Rc CT) ............................................................................. 255
10.1.7 CB bus module..................................................................................................................... 256
10.1.8 External I/O module IOM300 ............................................................................................... 257
10.1.9 External current transformer for N conductor, for 3-pole circuit breakers only .................... 258
10.1.10 Tripped signaling switch via auxiliary release (S25) ............................................................ 258
10.1.11 Ready-to-close signaling switch (RTC)................................................................................ 259
10.1.12 Undervoltage release / shunt release (UVR / ST2) ............................................................. 259
10.1.13 Time-delay device for UVR (external monitoring of UVR can be mounted on the DIN
rail) ....................................................................................................................................... 260
10.1.14 Closing coil (CC) / shunt release (ST) / actuator module (COM ACT) ................................ 261
10.1.15 Auxiliary switch AUX ............................................................................................................ 262
10.1.16 Auxiliary switch AUX 15, external ........................................................................................ 263
10.1.17 Optional voltage input, external neutral for the metering function of a 3-pole circuit
breaker ................................................................................................................................. 263
10.1.18 Position signaling switch PSS for guide frame .................................................................... 264
A Appendix .............................................................................................................................................265
A.1 The article number system................................................................................................... 265
A.2 Menu structure of the ETUs of the 6-series ......................................................................... 272

Table of contents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 7
B ESD guidelines ................................................................................................................................... 277
B.1 Electrostatic sensitive devices (ESD) ...................................................................................277
C List of abbreviations ............................................................................................................................ 279
C.1 Table of abbreviations...........................................................................................................279
Index................................................................................................................................................... 283

3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 9
Introduction
1
1.1
About this documentation
Circuit breaker
The circuit breaker is an integral part of an economically efficient, 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 configure,
connect, and operate the 3WL10 / 3VA27 circuit breaker and its accessories 3VW8/9.
1.2
Product-specific information
Target readers of this documentation
The information contained in this manual is provided for the benefit of:
●Users
●Control cabinet manufacturers
●Switchgear manufacturers
●Maintenance personnel
Siemens Technical Support
You can find further support on the Internet at:
Technical Support (http://www.siemens.com/lowvoltage/technical-support)

Introduction
1.3 Reference documents
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
10 Manual, 10/2018, L1V30499596002-01
1.3
Reference documents
Further documents
You can find further details in the following documents:
Table 1- 1 Reference documents
Title
Catalog LV 10 - Low-Voltage Power Distribution and Electrical Installa-
tion Technology
@
(https://support.industry.siemens.com/cs/ww/en
/view/109482234)
Catalog - 3VA27 Molded Case Circuit Breakers @
(https://support.industry.siemens.com/cs/ww/en
/view/109755686)
Communication Manual - 3VA27 Molded Case Circuit Breakers &
3WL10 Air Circuit Breakers
@
(https://support.industry.siemens.com/cs/ww/en
/view/109760220)
Configuration 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/co
m/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
Protection Technology Primer Siemens AG © 04 / 2009
E10003-E38-9T-B3011

Introduction
1.4 Advanced training courses
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 11
1.4
Advanced training courses
Find out about training courses on offer on the following link.
Training for Industry (https://www.siemens.com/sitrain-lowvoltage)
This is where you can choose from
●Web-based training courses (online, informative, free)
●Classroom training courses (course attendance, comprehensive, subject to fee)
.
You also have the possibility of compiling your own training portfolio via
Learning paths
.
1.5
Safety instructions
DANGER
Hazardous voltage
Results in death, serious injury or irreparable damage to material / property.
Only qualified 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 qualified 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.

Introduction
1.5 Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
12 Manual, 10/2018, L1V30499596002-01
Qualified personnel
A qualified 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
qualifications, 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 first aid.
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. You will find further ambient conditions in Chapter
Application planning (Page 137).
Standards
The circuit breaker complies with the standards:
●IE 60947-2
●IEC 60947-3
●EN 60947-2
●EN 60947-3

Introduction
1.5 Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 13
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. firewalls 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 (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 stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed at http://www.siemens.com/industrialsecurity
(http://www.siemens.com/industrialsecurity).
Open Source Software
This product also includes open-source software developed by third parties. You can find the
open-source software included in this product, and the corresponding open-source software
license conditions, in the Readme_OSS.
The open-source software programs are protected by copyright. You are authorized to use
the open-source software in accordance with the relevant open-source software license
conditions. In the case of contradictions between the open-source software license
conditions and the Siemens license conditions valid for the product, the open-source
software license conditions take precedence with regard to the open-source software.
The open-source software is provided free of charge. Insofar as the relevant open-source
software license conditions allow it, you can request the source text of the software from the
following address, on payment of the postage:
Siemens AG
Energy Management, Low Voltage & Products
Siemensstrasse 10
93055 Regensburg
Germany
Internet: (www.siemens.com/lowvoltage/support-request)
Keyword: Open Source Request (please specify product name and version, if applicable)
at least up to 3 years after purchasing the product:
We accept liability for the product, including the open-source software it contains, in
accordance with the license conditions valid for the product. We accept no liability for use of

Introduction
1.5 Safety instructions
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
14 Manual, 10/2018, L1V30499596002-01
the open-source software beyond the program sequence envisaged by us for the product,
and we accept no liability for faults caused by changes to the open-source software. We will
not provide any technical support for the product if this has been changed.
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.
If the circuit breaker is delivered in seaworthy packaging, check the color of the moisture
label:
●Blue: Moisture-tight packaging is effective
●Pink: Moisture-tight packaging is ineffective.
Inspect the circuit breaker for corrosion damage and report the damage to the carrier.
Replace or dry the desiccants and weld the plastic film. 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 first 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.

3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01 15
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. Effective 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 significantly reduced. 3VA molded
case circuit breakers are designed to be current limiting. IEC EN 60947-2 (VDE 0660-101),
section 2.3, page 12, defines current-limiting molded case circuit breakers in the following
way:
"Circuit breaker that, within a specified 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.
The user or plant constructor does still have to perform integration tests, but the physical
design and the system of accessories remain largely intact.

Description
2.4 Overview - applications and portfolio
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
16 Manual, 10/2018, L1V30499596002-01
2.4
Overview - applications and portfolio
This chapter provides an overview of the circuit breakers and describes the potential areas
of application for different circuit breaker models.
The topics discussed in this chapter are listed below:
●Applications and possible uses
●Portfolio
●Possible configurations
●Detailed information about applications and possible uses
●Technical specifications
●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):
–Communication modules (Plug & Play) for PROFIBUS DP, PROFINET IO,
Modbus TCP, and Modbus RTU
–I/O modules
–Modules with expanded metering functions for efficient energy management
●Integration of the circuit breaker into the Totally Integrated Power (TIP) solutions is
possible
●Integration into the SENTRON software environment, including powerconfig and
powermanager
Support by CAx files and Siemens tools simplifies 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
Manual, 10/2018, L1V30499596002-01 17
3WL10 air circuit breaker
The 3WL10 air circuit breaker is a current-carrying circuit breaker with IEC certification
(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 Inof 630 A to 1250 A
●Optionally available either as a fixed-mounted version or as a withdrawable version
●An especially high Icw value (up to 50kA 1s) and an Icu value (up to 66kA @440V)
3VA27 molded case circuit breaker
The 3VA27 molded case circuit breaker is a current-limiting circuit breaker with IEC
certification and is an addition to the existing 3VA IEC portfolio. It has the following
characteristics:
●Frame size 1600 A with a rated current Inof 800 A to 1600 A
●Choice of two designs:
–as a toggle operating mechanism, e.g. as an additional manual operating mechanism
–as a stored energy spring mechanism for integration of internal spring charging motors
(external dimensions are not affected by this)
●Optionally available either as a fixed-mounted version or as a withdrawable version
●An especially high Icu value (up to 110kA @415V) and an Icw value (up to 20kA 1s)

Description
2.5 Basic properties of the circuit breaker (3WL10 / 3VA27)
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
18 Manual, 10/2018, L1V30499596002-01
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 fieldbus 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
(I
cu
at 440 V)
55 kA, 85 kA, and 110 kA
(I
cu
at 415 V)
Fixed-mounted ✓✓
Withdrawable
✓
✓
Toggle operating mechanism
—
✓
Stored energy operating mechanism
✓
✓
Electronic trip units
3-series / 6-series
3-series / 6-series
Direct communication link to the device without an
intermediate gateway. Various bus systems are availa-
ble (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 ac-
cordance with IEC 60947-2
✓—
Modular and easy-to-fit accessories
✓
✓
Connections that can be retrofitted by the user. Its
orientation is modular or rotatable for subsequent modi-
fication.
✓✓