Power ground fault protection circuit

Abstract

The invention discloses a power ground fault protection circuit, comprising a power circuit, an electric leakage ground detection circuit, a signal amplifying and shaping circuit, and single chip microcomputer control circuit, a power detection and work instruction circuit, a tripping mechanism control circuit, a reverse wiring detection and execution circuit, a wireless network circuit and an automatic reset circuit, wherein the first filtering and voltage stabilizing circuit of the power circuit is connected with the electric leakage ground detection circuit; the second filtering and voltage stabilizing circuit of the power circuit is connected with the signal amplifying and shaping circuit and the single chip microcomputer control circuit; the electric leakage ground detection circuit, the signal amplifying and shaping circuit and the single chip microcomputer control circuit are sequentially connected; the single chip microcomputer control circuit is connected with the power detection and work instruction circuit, the tripping mechanism control circuit, the reverse wiring detection and execution circuit and the automatic reset circuit respectively; and the wireless network circuit is connected with the power circuit and the single chip microcomputer control circuit respectively. The power ground fault protection circuit achieves remote control on a ground fault breaker through the wireless network circuit and the automatic reset circuit, and is of convenient reset operation and high safety.

Description

Technical field [0001] The invention relates to a ground fault protection circuit for a power supply. Background technique [0002] Ground fault circuit breaker GFCI (GroundFaultCircuitInterrupter) is a leakage protection product widely used in North and South American countries and regions such as the United States and Canada. GFCI can provide power to the load through its upper cover jack, and at the same time supply power to the load connected to it through the output connection component, providing electrical safety protection. [0003] The Chinese patent application CN104332946A with the publication date of February 4, 2015 discloses "a power supply ground fault protection circuit and ground fault circuit breaker". The power supply ground fault protection circuit includes a power supply circuit, a leakage ground detection circuit, a signal amplification and shaping circuit, Single chip microcomputer control circuit, power supply detection and work indication circuit, tripping...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a power supply ground fault protection circuit, which overcomes the defect that the existing ground fault circuit breaker circuit can only perform manual reset operation and cannot perform remote reset operation

Images