Zero-sequence phase reversal self-locking type electric leakage protector control circuit and method

Abstract

The invention belongs to the household electric leakage protector product technical field and relates to a zero-sequence phase reversal self-locking type electric leakage protector control circuit and method. The zero-sequence phase reversal self-locking type electric leakage protector control circuit comprises a ground wire electrification detection and indication module, a ground wire voltage following module, a voltage logic analysis module, a phase reversal control module, a threshold value detection module, a self-locking module, a switching logic control module, a ground wire current detection module, a zero-sequence electric leakage detection module, an electric leakage tripping control module, a high temperature protection control module and an electromagnetic tripping coil. Compared with existing voltage type electric leakage protector technology, the zero-sequence phase reversal self-locking type electric leakage protector control circuit and method have high security, can automatically recognize and switch control modes and assist in eliminating security hidden risks caused by the sudden change of an electricity utilization environment.

Description

technical field [0001] The invention relates to the technical field of home leakage protector products, in particular to a zero-sequence reverse-phase self-locking type leakage protector control circuit and a method thereof. Background technique [0002] The existing leakage protectors include voltage type, current type and voltage / current interlock control type. The advantage of this type of product is that it can achieve better versatility by artificially selecting the protection type to adapt to the power environment. The disadvantage is that the leakage protector will not be able to deal with sudden changes in the later stage of the installed product. For example, if the voltage-type leakage protector is preset in advance, when the polarity of the power socket is reversed, and the ground wire of the socket is short-circuited with the live wire , at this time the voltage type leakage protector will lose its protection function. Aiming at this potential safety hazard, the...

AI Technical Summary

Problems solved by technology

The disadvantage is that the leakage protector will not be able to deal with sudden changes in the later stage of the installed product. For example, if the voltage-type leakage protector is preset in advance, when the polarity of the power socket is reversed, and the ground wire of the socket and the live wire are short-circuited , at this time the voltage type leakage protector will lose its protective effect

Aiming at this potential safety hazard, the present invention proposes a zero-sequence reverse-phase self-locking leakage protector protection method to solve the above-mentioned potential safety hazard

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