Electric leakage breaker capable of adjusting electric leakage parameters automatically and conducting low-voltage protection

Abstract

The invention provides an electric leakage breaker, which is provided with a microprocessor (12). The microprocessor (12) is respectively and electrically connected with button switches (S2 and S3), an electric operation mechanism movement circuit, an electric leakage detecting circuit, a voltage detecting circuit, an encoding switch setting circuit, an actuating mechanism movement circuit and light-emitting diodes (13 and 17-21). The electric leakage breaker can adjust setting of the electric leakage parameters automatically and has functions of low-voltage protection and over-voltage protection.

Description

technical field [0001] The utility model relates to low-voltage electrical equipment, in particular to a leakage circuit breaker used in the low-voltage electrical equipment, which is mainly used for leakage protection of trunk lines in rural power grids. Background technique [0002] At present, the leakage parameters of leakage circuit breakers used in low-voltage electrical equipment are fixed after the setting is completed. The disadvantages are: due to weather changes, air humidity increases, and the ground fault current increases due to the decline in insulation performance of the line. , and then trip the leakage circuit breaker. At this time, if the leakage parameters are not reset manually, the leakage circuit breaker will not be able to close normally. Leakage circuit breakers used in low-voltage electrical equipment can generally achieve under-voltage protection, but they are helpless for over-voltage protection. In rural power grids, over-voltage is also a freque...

AI Technical Summary

Problems solved by technology

[0002] At present, the leakage parameters of leakage circuit breakers used in low-voltage electrical equipment are fixed after the setting is completed. The disadvantages are: due to weather changes, air humidity increases, and the ground fault current increases due to the decline in insulation performance of the line. , and then trip the leakage circuit breaker. At this time, if the leakage parameters are not manually reset, the leakage circuit breaker will not be able to close normally.

Leakage circuit breakers used in low-voltage electrical equipment generally can only display leakage faults. When other types of faults occur, it is generally difficult for maintenance personnel to judge the type of fault in the line, which is not conducive to finding the cause of the fault.

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