anandmoh
Electrical
- Jan 30, 2007
- 9
dear fellow members,
what could be the reasons for arcing across the transformer top cover flange whenever the transformer is back charged from the 220kV side.This is a Generator step up unit connected to a Gas turbine Generator thro a GCB.During start ups the auxiliary board is energised thro the220kV breaker which also acts as a Station auxiliary transformer.The transformer tank flanges are a bolted design with equalising copper flexibles shorting links provided across the top and bottom flangeat a number of locations.