ELCB is used to protect the circuit from

Question

Question

This question was previously asked in

ISRO (VSSC) Technician Electrician 2019 Official Paper

Answer 1

An Earth-leakage circuit breaker (ELCB) is a safety device used in electrical installations with high Earth impedance to prevent shock.
It detects small stray voltages on the metal enclosures of electrical equipment.
ELCB or Earth Leakage Circuit Breaker are mainly used to protect a device/equipment from leakage of current.
The leakage current is caused due to partial touching of the live conductor with a metallic body of equipment.
The main purpose of Earth leakage protectors is to prevent injury to humans and animals due to electric shock caused by leakage current.