All-round leakage protection plug for monitoring live detectability of ground wire

Abstract

The invention discloses an all-round leakage protection plug for monitoring the live detectability of a ground wire. A series loop comprising a current-limiting resistor and a monitoring switch is connected between an internal phase line contact circuit and zero line contact circuit of the all-round leakage protection plug, and the series loop passes through a ground wire live detection inductor. When the ground wire live detection inductor passed by the ground wire has a fault, an all-round leakage protector having a fault can be found in time before an electrical hazard happens through periodical detection by a monitoring circuit, thus the fault can be eliminated in time, and the happening of the electrical hazard can be avoided.

Description

technical field [0001] The invention relates to the technical field of electricity safety protection, in particular to an all-round electric leakage protection plug capable of monitoring the electrification detection capability of ground wires. Background technique [0002] The Chinese Invention Patent Bulletin discloses an all-round electric leakage protection plug, whose patent publication number is CN1350352A. The all-round electric leakage protection plug is an all-round electric safety protector. The zero-sequence current transformer, the live detection sensor of the ground wire through which the ground wire passes, and the test circuit set on the zero-sequence current transformer, the free-trip breaker, the phase line contact, the neutral line contact, the ground wire contacts etc. It can not only detect whether there is residual current (commonly known as leakage current) between the phase and neutral wires through the zero-sequence current transformer through which ...

AI Technical Summary

Problems solved by technology

Although this universal leakage protection plug is provided with a test circuit on the zero-sequence current transformer between the phase and neutral wires, it is used as a regular check to monitor the working ability of the zero-sequence current transformer, but it cannot Regularly check and monitor the working ability of the ground wire live detection sensor, so that once the ground wire live detection sensor fails during use (for example: the connection point of the secondary output end of the ground wire live detection sensor is due to welding open circuit caused by false welding), but because there is no corresponding monitoring device to regularly check whether the working ability of the live detection sensor of the ground wire is missing, if you continue to use it in this case, once the ground wire is accidentally electrified, it may be damaged. Due to the failure of the ground wire live detection sensor, the all-round leakage protection plug cannot implement normal power-off protection, resulting in electrical accidents

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