The time to open the circuit breaker contact is called as ________

(A) Closing time

(B) Opening time

(C) Operating time

(D) Circuit breaker time


Answer: (B) Opening time

Explanation:

Opening time of the Circuit Breaker:

The time interval from the energization of the trip coil to the instant of contact separation is called the opening time of the circuit breaker.

Arcing Time:

The time from the separation of contact to the extinction of the arc is called the arcing time.

It depends on the magnitude of fault current as well as the voltage available to maintain the arc and upon the mechanism used for extinguishing the arc.

Total - Break Time:-

The Sum of Opening Time and Arcing Time is called Total Break Time.


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