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What is difference between earth leakage relay and
restricted earth fault relay ?
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Answer Posted / ali alhawarey
earth fault leakage relays are designed to work for any
fault related with earth i.e it can protect the whole
winding but since we use differntial protection no need for
this because differntial protection can protect the winding
up to certian limit
for faults far from the neutral point the leakage current
is high enough for differential protection tripping
for faults near the neutral point the fault voltage is small
nd so currents the differential protection will not operate
this area is coverd by restricted earth fault
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