Which of the following is the least expensive protection for overcurrent is low voltage system ?
Correct answer: A. Rewireable fuse
- A. Rewireable fuse
- B. Isolator
- C. Oil circuit breaker
- D. Air break circuit breaker
- E. None of the above
Explanation
A rewireable fuse is the simplest and least costly low-voltage overcurrent device, since its fuse wire can be replaced after operation. Isolators do not interrupt fault current, while circuit breakers are more expensive.
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