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differences between Fuse & Circuit Breaker

 


Basis for Comparison

               FUSE

        CIRCUIT BREAKER

MAINTENANCE

Fuse can only be used 1 time, it is a non- reusable device

Circuit Breaker can offer a total no of operations as declared by the manufacturer.

TRIP TIME

2-5ms, quickest operating device

Vary as per the device, ex: for ACB it can be 30ms & for MCCB can be less than 10ms

UTILIZATION CATEGORY

If the first letter is ‘g’ means both protection (O/L + S/C), If the first letter is ‘a’ only S/C will be there.

If category A it means no Icw shall be there, If category B, Icw shall be there

METHOD OF TRIPPING

‘SOLDER’ for Overload, ‘ELEMENT’ for Short Circuit

Available as ‘MICROPROCESSOR’ type & ‘THERMAL MAGNETIC’ type
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