Generator Circuit Breaker

[speedtronic]

For a synchronizing circuit breaker of some turbo generator, what should be the location of thr isolator? I mean should it be on generator side i.e. before circuit breaker or at the opposite side i.e. after circuit breaker? What I have observed so far is the Ist case i.e. on generator side but theoratically how it should be? please explain

 

[Guest123]

Hi

The isolator is always positioned upstream of the CB. That way the sync system can be shut off entirely for that geney should a problem occur with that particular set.

 

[speedtronic]

Thanks for your reply. A little confusion. Does upstream of GCB mean from Generator side or from opposite side i.e. busbar side?

 

[Guest123]

Sorry, upstream is before CB I.e genny side.