Leakage circuit breaker with instantaneous grounding power failure protection and leakage alarm function

Abstract

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

Description

technical field [0001] The invention relates to a leakage circuit breaker for human body electric shock protection, more particularly, to a leakage current circuit breaker with a leakage alarm function, which prolongs the waiting time for disconnection within the range that does not cause damage to the human body due to electric shock, so as to prevent Power failure caused by instantaneous grounding and prevention of leakage fire. Background technique [0002] At present, in Korea, in addition to high-capacitance industrial transmission lines, an earth leakage circuit breaker for human body electric shock protection is mandatory on AC single-phase 220V transmission lines. However, the single-phase AC 220V transmission line often has instantaneous ground faults due to mice or birds, and instantaneous ground faults of tens of mA and tens of ms caused by dust, moisture, and water leakage. Therefore, the existing earth leakage circuit breaker is cut off every time such an insta...

AI Technical Summary

Problems solved by technology

However, the induction current of the current leakage circuit breaker is 30mA, so the current leakage circuit breaker cannot prevent leakage fire

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