Question:
The interrupting time of a circuit breaker is the period between the instant of _______.
The interrupting time of a circuit breaker is the period between the instant of _______.
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Interrupting time starts when the trip coil is energized and ends with arc extinction — not just contact parting.
Updated On: Jun 24, 2025
- initiation of short circuit and the arc extinction on an opening operation.
- energising of the trip circuit and the arc extinction on an opening operation.
- initiation of short circuit and the parting of primary arc contacts.
- energising of the trip circuit and the parting of primary arc contacts
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The Correct Option is B
Solution and Explanation
Step 1: Define interrupting time
Interrupting time refers to the duration from the moment the trip command is given to the instant the arc is completely extinguished.
Step 2: Analyze options
Only Option (2) correctly includes both energizing of the trip circuit and completion of arc extinction — which defines the true interrupting time.
Interrupting time refers to the duration from the moment the trip command is given to the instant the arc is completely extinguished.
Step 2: Analyze options
Only Option (2) correctly includes both energizing of the trip circuit and completion of arc extinction — which defines the true interrupting time.
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