| 摘要 |
PROBLEM TO BE SOLVED: To provide an earth leakage circuit breaker capable of determining an earth leakage signal applied thereto with high accuracy, capable of precisely determining whether to perform trip operation with respect to an earth leakage signal applied thereto, and capable of preventing a malfunction thereof due to a noise signal similar to an earth leakage signal.SOLUTION: An earth leakage circuit breaker according to the present invention determines noise components included in an earth leakage signal, such as switching noise or harmonic components, on the basis of a determination signal generated by tracking the earth leakage signal, and performs trip operation. |
