What Is Earth Fault Protection. The earth fault protection scheme consists the earth fault relay which gives the tripping command to the circuit breaker and hence restricted the fault current. Relay pick up setting the control scheme signals the circuit disconnect to open.
Therefore it has a larger protective zone. Sensitive Earth fault Protection scheme is used for the detection of earth fault. Normally this relay is connected to a CT which is located in the neutralearthing point of a transformer.
These are normally fitted in machines of 1000 HP and above.
Methods of fault protection include Earthing of circuits and equipment. These are normally fitted in machines of 1000 HP and above. What is Ground Fault and Earth fault. The fault current is restricted and the fault is dispersed by the Restricted Earth Fault Protection REFP scheme.
