Name: Siemens SENTRON 3VA27
Brand: Siemens
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EQUIPMENT MANUAL

www.siemens.com/SENTRON

Air Circuit Breaker 3WL10 & Molded Case Circuit Breaker 3VA27

Protection devices

07/2023Ausgabe

SENTRON

Table of Contents4
Introduction10
About this Documentation10
Product-Specific Information10
Target Readers10
Technical Support10
Reference Documents11
Advanced Training Courses11
Safety Instructions12
Open Source Software13
Transport14
Description16
Current-Carrying 3WL10 Circuit Breakers16
Current-Limiting 3VA27 Molded Case Circuit Breakers16
Advantages of the Platform Approach16
Overview - Applications and Portfolio17
Basic Properties of the Circuit Breaker (3WL10 / 3VA27)17
Applications21
Possible Uses and Portfolio23
Portfolio of 3WL10 Air Circuit Breakers25
Portfolio of 3VA27 Molded Case Circuit Breakers26
Electronic Trip Unit (ETU)26
3VA27 / 3WL10 for Motor Protection Applications27
Basic Unit31
Product and Mounting Versions31
Design of the Circuit Breaker32
Withdrawable Breaker32
Technical Overview35
Circuit Breaker Identification40
Electronic Trip Unit ETU44
Description of Functions44
Selectivity47
Design of the Electronic Trip Units49
Electronic Trip Units of the 3-Series49
Electronic Trip Units of the 6-Series50
Characteristics of the ETU52
Characteristic Curves61
Features and Options64
Parameters of the Trip Units67
Metering Functions77
Communication81
Accessories Overview84
Accessories86
Accessories for Connection and Insulation88
Insulating Measures88
Connections of the Fixed Breaker Version90
Connections of the Withdrawable Breaker Version93
Electromechanical Accessories95
Auxiliary Releases for 3VA27 / 3WL1095
Accessories for Circuit Breakers98
Auxiliary, Alarm, and Signaling Switches101
Accessories for Communication Link, Remote Switching, and I/O Modules107
Rotary Operators110
Door Mounted Rotary Operator110
Front Mounted Rotary Operator112
External Accessories113
External Digital I/O Module IOM300113
Description113
External Current Transformers114
Rogowski CT solo External Neutral114
External CT for Grounding Conductors of the Main Power Supply (Grounded Transformer Star Point) G_Ret Using the Ground Fault Return115
Summation Current Transformer Rc CT116
Locking and Interlocking116
Support for Floor Fixation (Fixed Breaker)124
Breaker Data Adapters and Test Devices125
Overview125
TD310 Activation & Trip Box126
TD410 Breaker Data Adapter126
TD420 Test Device127
Application Planning130
Types of Installation and Installation Locations130
Mounting Position130
Degree of Protection133
Power Loss133
Ambient Conditions133
Current Reduction134
Current Reduction Depending on the Ambient Temperature on the 3WL10134
Current Reduction Depending on the Ambient Temperature on the 3VA27135
Use in IT Systems138
Electromagnetic Compatibility139
Installation in the Switchboard139
Power Supply, Grounding, and Connection141
Power Supply, Grounding, and Connection143
Isolating Distances and Insulating Equipment148
Armature Plates150
Communication Planning151
Connection and Commissioning154
Safety Regulations and Information154
Mounting and Connecting the Device155
Tightening Torques at a Glance155
Mounting Connections156
Fixed Breaker: Installing the Circuit Breaker163
Withdrawable Breaker: Installing the Circuit Breaker / Guide Frame165
Mounting Accessories168
Installing Accessories168
Examples of Mounting Internal Accessories175
Function Test of the ETU178
Commissioning179
General Tests179
Procedure for Testing the Accessories181
Final Tests183
Operation184
Opening and Closing184
Entering Parameters186
Racking the Circuit Breaker (Withdrawable Breaker)189
Alarms192
Troubleshooting197
Service and Maintenance200
Safety Regulations200
Tests During Inspections and after Tripping201
Maintenance Intervals201
Enclosure, Terminals, and Control Panel202
Checking and Cleaning the Housing202
Basic Unit and Accessories203
Removing the Front Plate and Accessories203
Cleaning and Lubricating the Tripping Mechanism204
Inspecting the Accessories204
Testing the ETU205
Final Tests205
Technical Specifications208
Technical Data 3WL10208
Technical Specifications - 3VA27208
Dimension Drawings210
Fixed-Mounted Breaker210
Circuit Breaker Without Connections210
Front Terminals for Main Circuit Connection211
Front Terminals for Main Circuit Connection, Extended212
Front Connection Bars, Broadened213
Horizontally / Vertically Orientable Rear Connection214
Circular Conductor Terminal, Adapter 4X240216
Switchboard Panel, Hole and Drilling Templates, Fixed Breaker217
Fixed-Mounted Version with Mounting Support220
Withdrawable Breaker221
Circuit Breaker Without Connections221
Horizontally / Vertically Orientable Rear Terminal for Main Circuit Connection222
Copper/Aluminum Cable Connection Bar223
Front Extended Terminal224
Front Connection Bars, Broadened225
Rear Connection Bars, Broadened226
Switchboard Panel, Hole and Drilling Templates, Withdrawable Breaker227
Further Dimension Drawings230
Phase Barrier230
Door Covers230
Terminal Cover231
Circuit Diagrams232
Circuit Diagrams of Accessories239
Tripped Signaling Switch (S24)239
Spring Charging Motor (MO), Spring Charged Signaling Switch (S21), Remote Reset Magnet (RR)239
Tripped Signaling Switch, Toggle Operating Mechanism MCCB (TAS)240
Leading Changeover Switch (S26)240
CT for Grounded Transformer Star Point (G_Ret)241
Summation Current Transformer (Rc CT)241
CB Bus Module242
External I/O Module IOM300243
External Current Transformer for N Conductor, for 3-Pole Circuit Breakers Only244
Tripped Signaling Switch Via Auxiliary Release (S25)245
Ready-To-Close Signaling Switch (RTC)245
Undervoltage Release / Shunt Release (UVR / ST2)245
Time-Delay Device for UVR (External Monitoring of UVR Can be Mounted on the DIN Rail)246
Closing Coil (CC) / Shunt Release (ST) / Actuator Module (COM ACT)246
Auxiliary Switch aux247
Auxiliary Switch aux 15, External248
Optional Voltage Input, External Neutral for the Metering Function of a 3-Pole Circuit Breaker248
Position Signaling Switch PSS for Guide Frame249
Appendix250
The Article Number System250
Menu Structure of the Etus of the 6-Series255
ESD Guidelines266
Electrostatic Sensitive Devices (ESD)266

Brand	Siemens
Model	SENTRON 3VA27
Category	Circuit breakers
Language	English

Siemens SENTRON 3VA27 Equipment Manual

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