Interlocking Of Two Circuit Breakers Using A Bowden Cable - Siemens SENTRON 3WA1 Manual

Accessories
4.9 Interlocking
4.9.2

Interlocking of two circuit breakers using a Bowden cable

Example
Description
In the case of a line infeed via transformer and a generator infeed, a circuit breaker can
only ever be closed when the other one is open. Power is provided either by the normal
power supply (circuit breaker Q1) or the standby power supply (circuit breaker Q2).
Required materials
An interlocking module with a Bowden cable is required for each circuit breaker, i.e. two
mechanical interlocks must be ordered.
Connections of the Bowden cables
1st Bowden cable:
2nd Bowden cable:
332
Possible circuit breaker statuses
Q1
Q1 A1 - Q2 E1
Q2 A1 - Q1 E1
Q2
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06