On behalf of the transformer circuit breaker with bypass breaker operation

Double busbar three main segments with bypass wiring problems present a lot of 500kV Substation 220kV double busbar system uses three main segments with bypass wiring. This wiring 500kV substation in actual operation, on behalf of the transformer in the bypass breaker breaker protection on many occasions during the operation  mcb circuit breaker , operating personnel misuse of accidents, this is mainly due to the operation of the current  electric meter  must be considered transformer (TA) circuit, the DC circuit, protection circuit and the outlet boot failure protection  Circuit breaker such as circuit switching, which switches on the operating personnel and the protection devices in high demand, especially in some less flexible protection switching, complicated operation , you can not fast operation.