Question

Write the working of miniature circuit Breaker

Answer 1

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The principal of operation is simple. An MCB functions by interrupting the continuity of electrical flow through the circuit once a fault is detected. In simple terms MCB is a switch which automatically turns off when the current flowing through it passes the maximum allowable limit.

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Answer 2

It works on the principle of magnetic tripping. whenever a high current flows through a circuit , magnetic flux is produced which magnetised the part of mcb which attract the tripping switch to cut the circuit from main lines and hence the whole circuits get protected due to this...