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 specications ..................................................................................................................... 207
8.1 Technical data 3WL10 ...................................................................................................... 207
8.2 Technical specications - 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