Mechanical Interlocking Two Sources (Open Transition) - Siemens UL 1066 Operating Instructions Manual

19.1.2 Mechanical interlocking two sources (open transition)

The two sources are interlocked to prevent paralleling (open transition).
Example
S
1
Description:
A circuit breaker can be closed only if the other is open.
Materials required:
Each circuit breaker has an interlocking module and a Bowden cable.
 (page 19-3)
Order no.
Connections of Bowden cables:
1st Bowden cable: S A
1
2nd Bowden cable: S A
2
19 – 3
Possible circuit breaker states
S
1
S
2
- S E
1 2 1
- S E
1 1 1
S
2