Device and method for achieving earth leakage protection non-power-failure test through bypass circuit follow current

Abstract

The invention discloses a device and method for achieving an earth leakage protection non-power-failure test through bypass circuit follow current. The device comprises a phase line incoming line, a neutral line incoming line, a phase line outgoing line and a neural line outgoing line, a phase line protection switch and a phase line two-way thyristor are in series connection between the phase lineincoming line and the phase line outgoing line, and a voltage meter is in parallel connection with the phase line two-way thyristor; a neural line protection switch and a neural line two-way thyristor are in series connection between the neutral line incoming line and the phase line outgoing line; a variable resistor is connected between the neural line protection switch and the neural line two-way thyristor through a wire and is in parallel connection with an ammeter and a mechanical switch. The device and method can be used for completing a single earth leakage protection test button non-power-failure test, a single earth leakage protection non-power-failure automated detection test and a non-power-failure periodic automatic detection test, when the device is not in the three working states, two-way silicon controlled cannot be connected, and it is avoided that when earth leakage protection causes a trip due to overloading, earth leakage and the like, equipment is damaged or an accident is caused after two-way silicon controlled connection tube charge is too large.

Description

technical field [0001] The invention mainly relates to the field of leakage protection, in particular to a device and method for realizing leakage protection and non-power failure test through freewheeling of a bypass circuit. Background technique [0002] The installation of leakage current action protectors in low-voltage power distribution systems is one of the effective measures to prevent direct contact electric shock accidents and indirect contact electric shock accidents, and it is also a technical measure to prevent electrical fires and electrical equipment damage accidents caused by grounding faults of electrical lines or electrical equipment . In order to verify whether the leakage protection function is normal, it is particularly important to test the leakage protection on a regular basis, but the power supply will be tripped and cut off during the leakage protection test, which will affect the reliability of the power supply. The device and method are used to te...

AI Technical Summary

Problems solved by technology

In order to verify whether the leakage protection function is normal, it is particularly important to test the leakage protection on a regular basis, but the power supply will be tripped and cut off during the leakage protection test, which will affect the reliability of the power supply. Device and method to test the continuity of use of the leakage current action protector, thereby verifying its safety in use

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