for one of our project we are using generator circuit breaker (GCB) instead of station transformer. GCB is inbetween Gen. Trf and Generator. So power (generator trf) trfr is back charged and feeds the Unit aux. tr at starting. Once the load picksup, GCB is opened and generator feed the UAT.
At this stage, whether power flow will be in back to the genertor?
what is the recative implication on genertor with this procedure?
Generator Circuit Breaker 
Re: generator transformer (power transformer)
