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How do breakers work?

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Anonymous

15y ago
Updated: 8/17/2019

Circuit breakers can be of these types

Fuse wire that melts when subjected to an over current.

Magnetic.

These contain a small electromagnet coil which becomes magnetised when a current flows through it. An over current operates a switch off mechanism which cannot be reset until the fault current is removed. Thermal,

These contain a bimetallic strip that is heated by the fault current. The strip bends by uneven expansion of the two metals and operates a switch mechanism.

Residual Current Device These monitor the current flowing to and from an electrical product. Any difference in current by a fault flowing via the earth protection wire will operated an electronic trip mechanism to isolate the device. Some breakers combine two of the above types eg thermal magnetic

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Wiki User

15y ago

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