Home › Electrical Engineering Forum › General Discussion › 11 KV SUBSTATION / under ground cable tripped on earth fault › Re: 11 KV SUBSTATION / under ground cable tripped on earth fault
2011/11/05 at 7:38 am
#12614
pillay
Participant
thanks for the reassuarance,but the protection unit ABB SPAJ was inter changed between the sender and receiving end but it still tripped at the sender end , furthermore later tests by calibration guys found both units to be good.I still pray its just the protection systems pc board.