Abstract: An overcurrent relay able to detect a failure current and rapidly generate a driving signal to drive a circuit breaker in response to the failure current is disclosed. The overcurrent relay has at least one Hall sensor detecting a failure current and outputting a Hall voltage signal; a filter filtering the Hall voltage signal to output a filtered signal having only an exponent wave; a reference voltage provider providing a reference voltage; a comparator comparing the filtered signal with the reference voltage and outputting a trigger signal when the filtered signal reaches the reference voltage; and a circuit breaker driver being triggered by the trigger signal to output a driving signal for driving a circuit breaker.

Abstract: An overcurrent relay able to detect a failure current and rapidly generate a driving signal to drive a circuit breaker in response to the failure current is disclosed. The overcurrent relay has at least one Hall sensor detecting a failure current and outputting a Hall voltage signal; a filter filtering the Hall voltage signal to output a filtered signal having only an exponent wave; a reference voltage provider providing a reference voltage; a comparator comparing the filtered signal with the reference voltage and outputting a trigger signal when the filtered signal reaches the reference voltage; and a circuit breaker driver being triggered by the trigger signal to output a driving signal for driving a circuit breaker.