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What is difference between earth leakage relay and
restricted earth fault relay ?
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Answer Posted / ramesh baba
Both Earth Fault Relay & Restricted Earth Fault Relay works
on the same principle, i.e. when fault current flows faulty
section in to the protective relay they will sense the
fault and trips the circuit.
But the main difference between these two relays is,
*** The earth fault relay will protect the system against
any phase to earth fault. But it can't sense the leakage
currents flowing throgh the neutral.
*** For sensing of over currents or leakage currents
flowing throgh the neutral , the restricted earth fault
relay is used.
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