Question

Expand Followings- (a) MCCB (b) SCR​

Answer 1

Answer:

Molded Case Circuit Breaker.

Silicon Controlled Rectifier (SCR),

Explanation:

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Answer 2

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MCCB:—

MCCB stands for Molded Case Circuit Breaker. It is another type of electrical protection device which is used when load current exceeds the limit of a miniature circuit breaker. The MCCB provides protection against overload, short circuit faults and is also used for switching the circuits.

SCR:—

A Silicon-Controlled Rectifier, or SCR, is essentially a Shockley diode with an extra terminal added. This extra terminal is called the gate, and it is used to trigger the device into conduction (latch it) by the application of a small voltage.