A power ground fault protection circuit

Abstract

A power supply grounding fault protection circuit includes a power supply circuit, a leakage grounding detection circuit, a signal amplification and shaping circuit, a single-chip microcomputer control circuit, a power supply detection and work indication circuit, a tripping mechanism control circuit, a reverse wiring detection and execution circuit, and a wireless network circuit. And the automatic reset circuit, the first filter voltage regulator circuit of the power supply circuit is connected with the leakage grounding detection circuit, the second filter voltage regulator circuit of the power supply circuit is connected with the signal amplification and shaping circuit and the single-chip control circuit, and the leakage grounding detection circuit, the signal amplification and shaping circuit and the single-chip microcomputer are connected. The control circuits are connected in sequence, the single-chip control circuit is respectively connected with the power supply detection and work indication circuit, the tripping mechanism control circuit, the reverse wiring detection and execution circuit, and the automatic reset circuit, and the wireless network circuit is respectively connected with the power supply circuit and the single-chip control circuit. The invention realizes the remote control of the ground fault circuit breaker through the wireless network circuit and the automatic reset circuit, and has convenient reset operation and high safety.

Description

technical field [0001] The invention relates to a ground fault protection circuit of a power supply. Background technique [0002] Ground Fault Circuit Interrupter GFCI (Ground Fault Circuit Interrupter) is a leakage protection product widely used in the United States, Canada and other North American and South American countries and regions. The GFCI can provide power to the load through the socket on its upper cover, and also supply power to the load connected to it through the output connection component, providing power safety protection. [0003] Chinese patent application CN104332946A published on 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 instruction circuit, tripping m...

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

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