EARTH LEAKAGE CIRCUIT BREAKER

摘要

Disclosed is an earth leakage circuit breaker. The earth leakage circuit breaker is capable of determining an earth leakage signal applied thereto with high accuracy, by performing a trip operation by determining noise components included in the earth leakage signal, such as switching noise or harmonics, based on a determination signal generated by tracking the earth leakage signal. The earth leakage circuit breaker is capable of precisely determining whether to perform a trip operation with respect to an earth leakage signal applied thereto. The earth leakage circuit breaker is capable of preventing a malfunction due to a noise signal similar to an earth leakage signal.

主权项

1. An earth leakage circuit breaker, comprising:
a trip coil configured to generate an electromagnetic force for tripping a circuit; a detection unit configured to detect an earth leakage signal on the circuit; a signal generation unit configured to generate a determination signal by tracking the earth leakage signal; and a controller configured to determine whether the earth leakage signal includes noise or not by comparing the determination signal with a reference signal, and configured to control an operation of the trip coil according to a result of the determination.