Difference between MCB, MCCB, MPCB & Their types, Uses & Classification

Question

Accepted Answer

MCB, MCCB, and MPCB are circuit breakers used for electrical protection. They differ in their current ratings and trip characteristics.

MCB stands for Miniature Circuit Breaker and is used for low current applications up to 125A.
MCCB stands for Molded Case Circuit Breaker and is used for higher current applications up to 2500A.
MPCB stands for Motor Protection Circuit Breaker and is used for protecting motors from overload and short circuit.
MCBs are classified based on their trip characteristics such as B, C, and D types.
MCCBs are classified based on their current ratings and trip characteristics such as thermal and magnetic trip units.
MPCBs are classified based on their current ratings and motor protection features such as overload and short circuit protection.
MCBs are commonly used in residential and commercial applications.
MCCBs are commonly used in industrial and commercial applications.
MPCBs are commonly used in motor control panels and industrial applications.

Top IDC Technologies Electrical Design Engineer interview questions & answers