Leakage protector and leakage protection function detection method

Abstract

The invention provides a leakage protector and a leakage protection function detection method. The leakage protection function detection method comprises: when a leakage protector is set in an automatic detection state, periodically determining whether the present timing time reaches preset time span; and under the condition that the present timing time reaches the preset time span, the leakage protector automatically simulating to generate leakage current in a power grid, measuring the leakage current in the power grid, and determining whether the leakage current is larger than a preset leakage current threshold value, and under the condition that the leakage current is generated in the power grid by simulation and the leakage current in the power grid is not larger than the preset leakage current threshold value, outputting a leakage protection function fault signal or outputting a breaker breaking control signal. Thus, the leakage protector can be detected at regular time without manual operation, so as to ensure the leakage protection performance of the leakage protector, and effectively prevent various risks and loss caused by failure of the leakage protector.

Description

technical field [0001] The invention relates to the field of leakage protection, and in particular to a leakage protector and a method for detecting the leakage protection function. Background technique [0002] Leakage protector is a kind of safety electrical appliance, which detects the magnitude of the phase-to-ground leakage current or electric shock current inside the protected grid, sends out a circuit breaker breaking control signal and completes the breaking of the circuit breaker to disconnect the grid power supply. [0003] As a kind of safety electrical appliance, the requirements for the quality and performance of leakage protectors are very strict. After the leakage protector is installed, the test button should be operated to detect the working characteristics of the leakage protector, and it is allowed to be put into use after confirming that it can operate normally. Moreover, its reliability should be tested regularly through the test button during use, and ...

AI Technical Summary

Problems solved by technology

Once the leakage protector fails, when the electric shock current or the phase-to-ground leakage current occurs, huge losses will occur

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