Inspection & Maintenance
4.7 Maintaining the main contact system
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
185
Removing the rear housing of the Circuit breaker
Keep angle brackets on the Circuit breaker
Only loosen the front screws and remove only the back screws to ensure that the angle
brackets are still fixed to the breaker.
1. Support the breaker
Equipment damage or personal injury may occur
Support the breaker as shown in the picture to prevent it from falling over.
2. Unscrew and remove the screws and washers from the rear housing.
3. Unplug the cables of the internal current transformers.
4. Remove the rear housing.
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