Answer / ramanrajivgandhi

Buchhol's relays,Earth fault relay,Explosion vent relays,Alarm circuit relays,tripping circuit relays

Answer / vikas kumar

that is 2 types of power transfomer protection 1. main protection
2. back up protection
main protection eg: diffrenceal relay protection.
back up protection eg: IDMT over current
& earth fult, dc logic protectio (buchholz, PRV, MOAG,SPR) etc.

Answer / karthi

Differential protection
REF protection
Stand-by Earthfault protection
Backup Overcurrent protection
overflux protection

Answer / magan

above what amp current rating do bus ducts use in LT. ??

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