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Technical Article

What is the difference between a relay and a fuse and a circuit breaker?

Time:2019-06-12 17:16:15 Click:

Relay: As the bimetal deformation reaches a certain distance, the control circuit will be disconnected so that the contactor is about to lose power and the main circuit is also disconnected, that is how a relay realizes overload protection to the motor.


Fuse: As long as the current exceeds the specified value for a certain time, it will be melted by its own heat and cut off the power supply.


Circuit breaker: It can automatically cut off the circuit in case of serious overload, short circuit or undervoltage, whose function is equivalent to the combination of fuse switch and over-underheating relay.



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