For t he same rupturing capacity, the actual current to

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For t he same rupturing capacity, the actual current to be interrupted by an HRC fuse is

1. much less than any circuit breaker
2. much more than any circuit breaker
3. equal to the circuit breaker
4. none of these

Correct Option: A

The cut-off characteristics of HRC fuse are shown below:

t₁ + t₂ = total operating time
As we see here, that operating time is as low as 1/4^th of the cycle, and the actual current to be interrupted is much less than any CB.