2021-08-03 at 11:08 am
#1205
smuthukrshna
Sensitve earth fault relays are always followed with time delay function.At the time of closing the breaker instantaneous relays will have a tendency to operate either due to line capacitance charging or due to unbalance magentic inrush current.If the time delay is kept to avoid maltripping that is sufficient. Regards S.Muthukrshna