Main and Transfer Switchyard

How power plants work: A simple introduction to how electricity is ..

Quote

"In main and transfer switchyard any one circuit breaker fails how to connect the bus coupler bay

help me"

Have you the slightest idea of what you're doing. No one in their right mind would let you loose in a switchyard.

I'm sorry if this sounds offensive but you did say "help me".

I'm trying to keep you alive!

hello engineer,

better you keep off from the switchyard. anyway, when main CB fails, that line load will be shifted to the transfer bus through transfer bus isolator and the line will be connected to the main bus by closing the transfer bus coupler CB. Now all the trips issued by the line protection relays will be delivered to TBC CB and not to the faulty line CB. One disadvantage in this scheme is at a time, only one breaker can be put into transfer. so this is mostly used in 110, 132, 220kV grids stations.