Why stand-by earth fault relay and restricted earth fault relays are connected

Why stand-by earth fault relay and restricted earth fault
relays are connected between neutral and ground in
transformer?

Question Posted / sivasundar

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Why stand-by earth fault relay and restricted earth fault relays are connected between neutral and..

Answer / p.chandramouli

Because the neutral of the Transformers are connected to
ground. And the return currents as well as unbalance
currents flow in neutral in the process of balancing the 3
phase winding system of the Transformer.

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