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Answer Posted / venkat narayana
Every body knows that ELCB ---> Earth Leakage Circuit
Breaker it itself indicate that whenever Current leaks and
go to Earth then it trip the circuit that called earth Leakage.
But where as RRCB Residual Cuurent .i.e sum of all Vector
sum is not equal to ZERO that is called Residual. Whcih
flows through the neutral, THis can set according to our
Load condition, that is it trip under Unbalnced currents.
Ir+Iy+Ib = In = 0 Noraml Condition
Ir+Iy+Ib NOt equal to ZERO, under unbalnced condition.
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