Correct option is B
A
Miniature Circuit Breaker (MCB) is an electromechanical device used to protect electrical circuits from overloads and short circuits. Its key components are:
Bimetallic strip:
· The bimetallic strip heats up due to excessive current, bends, and trips the circuit breaker in case of an overload.
· It is a key component of MCB.
On/Off lever:
· Used to manually switch the MCB ON or OFF.
· It is a standard component of MCB.
Trip coil:
· Used to trip the breaker when a short circuit occurs.
· The high fault current activates the trip coil, breaking the circuit.
· It is an essential part of MCB.
Discharge capacitor:
· MCBs do not use discharge capacitors. Capacitors are generally used in filters, surge protection, or reactive power compensation, but they are NOT a part of the MCB design.
Advantages of MCB over Fuse:
· Can be reset manually after tripping.
· Faster and more reliable in operation.
