Physics · Electrical Instruments
With reference to Earth Leakage Circuit Breakers (ELCB) and Residual Current Circuit Breakers (RCCB), which of the following statements is INCORRECT?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Voltage-operated ELCBs are preferred over RCCBs because they detect current leakage to the ground via any path, including through a human body.✓
- 2An RCCB is connected to both phase and neutral wires, but not directly to the ground wire, and it trips when the currents in phase and neutral are unequal.
- 3Standard RCCBs function accurately with pure sinusoidal waveforms, but their proper operation is not guaranteed on non-standard waveforms like pulsed DC.
- 4One terminal of a voltage-operated ELCB relay coil is connected to the metallic body of the equipment and the other terminal to an independent earth electrode.
Correct answer
Voltage-operated ELCBs are preferred over RCCBs because they detect current leakage to the ground via any path, including through a human body.
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