Discussion
Which of the following is NOT a valid advantage of an HRC fuse?
Answer: D
The advantages of an HRC (high rupturing capacity) fuse are that it needs no maintenance, it operates very fast and so limits the let through current of a short circuit, and it is cheap. Its disadvantage is that it is a one shot device: once the element has blown, the whole fuse link must be replaced, so it cannot be reused for multiple operations, and the circuit breaker, in contrast, can be reclosed. So the reuse statement is the one that is not an advantage. The answer is option D.
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