Answer Posted / atul pradhan
Generally H.T. side of trans.neutrol grounded through
resistor called NGR which is depends upon earth fault delay
time.At L.T. side neutrol grounded solidly .
This is because when earth fault occurs in phase, fault
current passes through neutral to earth immidiately to
avoide further damage to system.Earth fault protection
relay mounted on neutrel C.T.This relay operates properly.
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