Mechanical Interlocking Two Sources With A Tie Circuit Breaker (Open Transition) - Siemens UL 489 Operating Instructions Manual

19.1.3 Mechanical interlocking two sources with a tie circuit breaker (open transition)

The two sources are interlocked to prevent paralleling (open transition).
Example
S
S
3
1
S
2
Description:
Any two circuit breakers can be closed, with the third being interlocked.
Materials required:
Each circuit breaker has an interlocking module and a Bowden cables. Three additional Bowden cables must be ordered separately.
 (page 19-4)
Order no.
Connections of Bowden cables:
1st Bowden cable: S A
1
2nd Bowden cable: S A
1
3rd Bowden cable: S A
2
4th Bowden cable: S A
2
5th Bowden cable: S A
3
6th Bowden cable: S A
3
19 – 4
Possible circuit breaker states
S
1
- S E
1 2 1
- S E
2 3 1
- S E
1 1 1
- S E
2 3 2
- S E
1 1 2
- S E
2 2 2
S
2
S
3