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Answer Posted / omprakash sahu
Elcb is working based on Earth leakage current. But Rccb is
not having sensing or connectivity of Earth, because
fundamentally Phase current is equal to the neutral current
in single phase. That’s why RCCB can trip when the both
currents are deferent and it withstand up to both the
currents are same. Both the neutral and phase currents are
different that means current is flowing through the Earth.
Finally both are working for same, but the thing is
connectivity is difference.
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