LEAKAGE BREAKER WITH INSTANTANEOUS GROUND FAULT BLACKOUT PROTECTION AND LEAKAGE ALARM FUNCTION

摘要

To provide a leakage breaker for preventing a leakage fire by disabling the leakage breaker in an event of a momentary ground fault and issuing a leakage alarm signal when a leakage current exceeds a reference value.SOLUTION: The leakage breaker includes: portions (1, 2, 3, 4, and 5) for calculating a resistance component leakage current and a combined leakage current from a combined leakage current instantaneous value detected by a ZCT; portions (9, 10, 11 and 12) for activating the leakage breaker to interrupt an electric line when the resistance component leakage current exceeds an allowable value to protect a human body from electric shock; and portions (13, 14, and 15) for instructing a leakage warning when the resistance component leakage current exceeds the allowable value to prevent leakage fire.SELECTED DRAWING: Figure 1