Given below are two tools, namely:
(a) Voltage Operated Earth Leakage Circuit Breaker or 'ELCB'.
(b) Current Operated ELCB, formally called Residual Current Circuit Breaker or 'RCCB'.
Which of the following options is incorrect for these devices?
1
One terminal of the ELCB relay is connected to the metal part of the equipment to be protected and the other to the ground wire.
2
Standard RCCBs work fine for standard waveforms, but they are not guaranteed to work on non-standard waveforms such as pulsed DC.
3
The RCCB is connected with both phase and neutral wire, but not with grounded wire, and is tripped when the currents in both are not equal.
4
ELCBs are very sensitive to fault conditions hence sometimes troublesome trips.