Detecting apparatus for circuit breaker and circuit breaker

Abstract

A detecting apparatus for a circuit breaker and a circuit breaker are provided. The detecting apparatus includes: a micro control unit including an analog-to-digital conversion port and a digital-to-analog conversion port; and a zero-sequence current transformer coupled in a line of the circuit breaker and including: an induction coil encircling the line of the circuit breaker; a detection winding coupled to the induction coil and connected to the analog-to-digital conversion port, so as to induce an induction signal from the induction coil at least during a leakage period or a leakage detection period and send a leakage signal related to the induction signal to the analog-to-digital conversion port; and a self-detection winding coupled to the induction coil and connected to the digital-to-analog conversion port, so as to receive a self-detection signal sent by the micro control unit via the digital-to-analog conversion port to perform a leakage detection.

Dependencies are inferred from the claim text.