(i) Fuse performs both detection and interruption functions. Circuit breaker performs interruption function only. The detection of fault is made by relay system.
(ii) The breaking capacity of fuse is very small compare to that of circuit breaker.
(iii) The operating time of the fuse is smaller than operating time of CB.
(iv) After every operation, replacement is required in the fuse. In case of circuit breaker, replacement is not required.
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