Failure-proof control circuit chip and safety leakage protector

Abstract

The invention relates to a failure-proof control circuit chip and a safe electric leakage protector. According to a technical method, a detection input terminal and a peripheral base limit terminal of the failure-proof control circuit chip IFYK or 2LEK taken as a core circuit are connected with a secondary coil of a zero sequence current mutual inductor; two output terminals of the core circuit are connected with a driving or executing circuit; the executing circuit is used for controlling a loaded alternating current power supply; an input virton potential is used for maintaining the core circuit in a normal switching-on state so as to promote the driving or executing circuit to switch on the loaded alternating current power supply; an electric leakage or electric shock signal is used for triggering a locking circuit in the core circuit in a cut-off state so as to compel the driving or executing circuit to cut off the loaded alternating current power supply, so that the protection and the control of electric leakage are realized; a basic protection circuit, an intercepting circuit, a triggering circuit and the locking circuit in the core circuit are used for monitoring various self failures of the core circuit and compelling the driving or executing circuit to cut off the loaded alternating current power supply. Thus, the electric shock accident caused by the self failure of the failure-proof control circuit chip can be avoided, so that the safe of a human body is ensured.

Description

technical field [0001] The invention relates to a control circuit and an electric shock or leakage protector, in particular to a control circuit chip and a safety leakage protector capable of preventing malfunction and failure. Background technique [0002] In order to verify the novelty of the present invention, the designer consulted a large number of relevant technical materials (professional books, newspapers and periodicals), and also retrieved relevant patent documents. There are many kinds of existing old leakage protectors, which can basically effectively protect and control the leakage or electric shock of the load (electrical appliance) under normal conditions, but there are generally potential fatal defects: when an abnormal fault occurs in itself, its protection function It will fail and form out of control refusal to jump. In case of leakage or electric shock, the AC power supply of the load (electrical appliance) cannot be cut off in time, and the electric shoc...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the technical problems that existing old leakage protectors and their dedicated core control circuits often fail out of control due to their own abnormal faults, cannot cut off the load power supply in time, have potential safety hazards, and seriously threaten personal safety; When an abnormal fault occurs, it can also timely and reliably carry out anti-locking or blocking cut-off protection control, forcefully disconnect the AC power supply of the load (electrical appliance), and can avoid and prevent electric shock when the abnormal fault fails, a new type of "intrinsically safe" safety Leakage protector and its control circuit chip against failure

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