difference between MCB,MCCB,ELCB and ACB

Question

Accepted Answer

MCB, MCCB, ELCB, and ACB are types of circuit breakers used for electrical protection in different applications.

MCB (Miniature Circuit Breaker) is used for low voltage applications and has a lower breaking capacity compared to MCCB.
MCCB (Molded Case Circuit Breaker) is used for higher voltage applications and has a higher breaking capacity compared to MCB.
ELCB (Earth Leakage Circuit Breaker) is used to detect earth faults and provide protection against electric shock.
ACB (Air Circuit Breaker) is used for high voltage applications and can handle large currents.
Examples: MCBs are commonly used in residential electrical panels, while MCCBs are used in industrial settings.
ELCBs are often used in combination with MCBs for enhanced protection.
ACBs are used in power distribution systems for large commercial buildings or industrial plants.

Top L&T Technology Services Electrical Design Engineer interview questions & answers