SAFE QUICK DISCONNECT LEAKAGE PROTECTOR

摘要

The present disclosure provides a safe quick disconnect leakage protector, including a power supply circuit, a sampling circuit, a couple of single-pole single-throws, an on and off control circuit, and a testing circuit. The sampling circuit collects the leakage current signal between the live wire and the neutral wire and outputting the leakage current signal; the main control circuit receives the leakage current signal outputted from the sampling circuit, amplifies the leakage current signal, and outputs a grounding failure control signal when the leakage current reaches the predetermined value; the on and off control circuit receives the grounding failure control signal outputted from the main control circuit and controls the single-pole single-throw switches to disconnect the load from the external power supply according to the grounding failure control signal, thereby protecting the load and improves the safety of the leakage protection of an electrical appliance.

主权项

1. A safe quick disconnect leakage protector, comprising:
a power supply circuit, configured for providing power to the leakage protector; a sampling circuit connected between a live wire and a neutral wire of an input terminal of an external power supply, for collecting a leakage current signal between the live wire and the neutral wire and outputting the leakage current signal; a main control circuit, configured for receiving the leakage current signal outputted from the sampling circuit, amplifying the leakage current signal, and outputting a grounding failure control signal when the leakage current reaches a predetermined value; a couple of single-pole single-throw switches, one of the single-pole single-throw switch being connected between the input terminal of the external power supply and the sampling circuit on the live wire, and the other one being connected between the input terminal of the external power supply and the sampling circuit on the neutral wire; an on and off control circuit, configured for receiving the grounding failure control signal outputted from the main control circuit and controlling the single-pole single-throw switches to disconnect the load from the external power supply according to the grounding failure control signal; and a testing circuit connected to the sampling circuit for providing a stimulated failure current signal to the sampling circuit to test whether the leakage protector work normally.