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

19 – 3
19.1.2 Mechanical interlocking two sources (open transition)
The two sources are interlocked to prevent paralleling (open transition).
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.
Order no.  (page 19-3)
Connections of Bowden cables:
Example Possible circuit breaker states
S
1
S
2
1st Bowden cable: S
1
A
1
- S
2
E
1
2nd Bowden cable: S
2
A
1
- S
1
E
1
S
1
S
2