PROTECTION CIRCUIT AND GROUND FAULT CIRCUIT INTERRUPTER

摘要

The present invention relates to a protection circuit and a ground fault circuit interrupter. A protection circuit may include a power supply circuit, a ground fault detection circuit, a signal amplifying and shaping circuit, a microcontroller control circuit, a power supply detection and indicator circuit, a tripping mechanism control circuit, and a reverse grounding detection and execution circuit. The microcontroller control includes a microcontroller, a first capacitor, and a reset filter circuit. The reset filter circuit comprises a reset IC, a second capacitor, and another capacitor. A ground fault circuit interrupter may comprise an interrupter body with a protection circuit in the interrupter body. The practice of the present disclosure may address installation safety risks of conventional ground fault circuit interrupters and arc fault circuit interrupter and improve the safety of ground fault circuit interrupters.

主权项

1. A protection circuit, comprising:
a power supply circuit; a ground fault detection circuit; a signal amplifying and shaping circuit; a microcontroller control circuit; a power supply detection and indicator circuit; a tripping mechanism control circuit; and a reverse grounding detection and execution circuit, wherein:
the microcontroller control comprises a microcontroller, a first capacitor, and a reset filter circuit;the reset filter circuit comprises a reset IC, a second capacitor, and a nineteenth capacitor;a first pin of the reset IC is connected to a VCC of the protection circuit, a second pin of the reset IC is connected to a reset terminal of the microcontroller, and a third pin of the reset IC is grounded;the second capacitor is connected between the second and third pins of the reset IC;the first capacitor is connected between a power supply terminal of the microcontroller and a ground;the nineteenth capacitor is connected between the first pin of the reset IC and the ground;the power supply terminal of the microcontroller is connected to the VCC; anda ground terminal of the microcontroller is grounded.