Withdrawable Breaker - Siemens SENTRON 3WL10 Series Manual

Description
2.3 Basic unit
2.3.1

Withdrawable breaker

The withdrawable version of the circuit breaker is not permanently mounted in the control
cabinet. Instead a guide frame holding the circuit breaker is mounted in the control cabinet.
The busbars and cables are connected to this guide frame. When the circuit breaker is
inserted into the guide frame, the main circuit connection is established. In the retracted
position, built-in shutters ensure safe touch protection of the main circuit connections.
In this way, the circuit breaker can be removed from the guide frame without disassembly
work and removed from the control cabinet if required.
The withdrawable breaker has the following advantages:
● Fast replacement of the circuit breaker for maintenance and service
● Simple establishment of visible galvanic disconnection in the main circuit
● Testing of the auxiliary circuits while the main circuit is open
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Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01