Protection device for preventing bidirectional earth leakage of ground wire

Abstract

The invention relates to a protection device for preventing bidirectional earth leakage of a ground wire, which is designed for solving the problems of reverse electric leakage caused by interconnection of ground terminals of household circuits in the prior art and realization of open-circuit protection of null and live wires during electric leakage and the like, and comprises a sampling circuit, an electromagnetic low-voltage selection control circuit, a trigger circuit, an alarm circuit and a switch open-circuit circuit, wherein the sampling circuit inputs a direction signal into the input end of the electromagnetic low-voltage selection control circuit through the voltage direction signal sensor, the selection control circuit realizes the selection of forward and reverse signals on action trigger protection, then a trigger signal is input into the trigger circuit, the voltage reduction and threshold selection of the accessed leakage voltage are realized in the trigger circuit, and then the relay is triggered to be closed through the amplification of the triode, so that the corresponding alarm action and the turn-off protection action on the zero line, the fire line and the ground line in the alarm circuit and the switch circuit break circuit are driven, the bidirectional leakage circuit break protection is realized, the cost is relatively low, and the device is more worthy of popularization.

Description

technical field [0001] The invention belongs to the field of electronic appliances, in particular to a two-way leakage protection device for grounding wires. Background technique [0002] With the rapid development of society, the living standards of residents are gradually improving, and the requirements for household electricity consumption are also increasing. Various household appliances have become an indispensable part of our daily life. However, due to the lack of leakage protection systems in various power consumption environments, there have been many electric shock accidents caused by electrical equipment leakage in recent years. Through the analysis of some accident cases, we found that there are the following problems in various leakage protection measures: the self-built houses lack the grounding system of electrical equipment, or the grounding system is not up to standard; the public grounding protection system of some residential quarters has been used for a l...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the existing leakage protection devices, the purpose of the present invention is to provide a two-way leakage protection device for grounding wires. impact, and when the leakage voltage is too high, it will cause electric shock to the human body, and it can effectively solve the protection problem when the internal power supply of the leakage protection switch leaks

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