Mechanical Interlocking Source And Tie Circuit Breaker (Open Transition To Standby System) - Siemens UL 1066 Operating Instructions Manual

19.1.6 Mechanical interlocking source and tie circuit breaker (open transition to standby system)

The standby system is mechanically interlocked with the tie circuit breaker to prevent paralleling with primary source.
Example
S
S
3
1
S
2
Description:
One circuit breaker (S ) can be opened and closed independently of the two others. The two others cancel each other out, i.e. one can only
1
be closed if the other is open.
Materials required:
Two of the three circuit breakers (S
 (page 19-7)
Order no.
Connections of Bowden cables:
1st Bowden cable: S A
2
2nd Bowden cable: S A
3
19 – 7
Possible circuit breaker states
S
1
, S ) each have an interlocking module and a Bowden cable.
2 3
- S E
1 3 1
- S E
1 2 1
S
2
S
3