How Does Earth Fault Relay Works. In case of phase to ground faults high currents flow to the grounded neutral of the transformer. The earth fault relay is a type of relay that can sense the faults between the phase and earth.
The earth fault relay must be very sensitive for sensing the fault. To energize the relay alternating current AC or direct current DC is passed through the coil of the electromagnet magnetizing the core to attract the lever. Earth fault relay senses these faults.
Fault which is the signature of a fault that is either forward or reverse.
The working principle is allmost same just this relay is capable of sensing greater fault currents. Earth fault relay senses these faults. The working principle is allmost same just this relay is capable of sensing greater fault currents. The relay uses a toroid to measure the earth leakage current.
