An intelligent detection and protection circuit for termination of service life of ground fault breaker

Abstract

The related intelligent detection protective circuit for lifetime termination of grounding fault breaker adds an abnormal monitor circuit for the leakage protector fault based on general leakage protector. This invention employs LED to display abnormal condition, and reduces accident for people protection.

Description

Technical field [0001] The invention relates to an intelligent detection and protection circuit for the end of life of a ground fault circuit breaker. Background technique [0002] The basic principle of the ground short-circuit leakage protection device of the low-voltage electrical appliance ground fault circuit interrupter GFCI is: on an AC active line, the loop current of the live line and the neutral line should be equal under the condition of normal power consumption. Once a ground short-circuit leakage accident occurs, the live wire current and the neutral wire current in the loop will be unbalanced. The induction coil in the GFCI leakage protection monitors the current difference and converts it into a voltage signal, which is amplified by the leakage detection circuit IC Then make a judgment and output it to the control part. Once the difference is greater than the set threshold, the control IC will output a corresponding control signal to make the GFCI circuit brea...

AI Technical Summary

Problems solved by technology

[0003] Leakage fault circuit breaker products are a kind of electronic devices that are commonly used now. Due to reasons such as the use environment, power conditions, improper installation, and long-term use of component damage and aging, some products cannot provide correct protection functions. Once the product fails If the control signal cannot be output, or the release fails to operate, it will cause a major electrical safety accident

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