Leakage detection and protection circuit with timing self-test function of discrete components

Abstract

The invention provides a leakage detection and protection circuit with a timing self-test function of discrete components, including a power input terminal, a power user terminal, a power output terminal, a reset button, a main circuit switch, a double induction coil, a tripping coil, a thyristor and The control chip and the timing self-inspection circuit, the timing self-inspection circuit includes the self-inspection chip and the second thyristor; the trigger pole of the thyristor leads to the drive pin of the control chip and leads to the A / D conversion interface of the self-inspection chip, The thyristor anode leads to another A / D conversion interface of the self-inspection chip. The self-inspection chip is used to collect the electrical parameters of the drive pin of the control chip and the electrical parameters of the anode of the thyristor, and compare them with the corresponding set electrical parameters to judge A processing module that controls whether the chip and the thyristor are working normally. The beneficial effect of the present invention is that the electrical parameters of the thyristor, the control chip and the entire detection and protection circuit are collected separately, and at the end of life, it is possible to quickly determine which of the discrete components is damaged, which is convenient and safe to use.

Description

Technical field [0001] The invention relates to the technical field of power sockets, in particular to a leakage detection protection circuit with a discrete component timing self-check function. Background technique [0002] The leakage detection protection circuit disclosed in the invention patent application with the application number 201310452956.0 includes a power input terminal, a power user terminal, a power output terminal, a reset button, a main loop switch linked with the reset button, and a dual circuit for detecting leakage current and low resistance faults. Induction coil, trip coil that drives the built-in iron core through the action of a magnetic field and the mechanical structure to make the reset button drive the main circuit switch to close / open, the thyristor that provides a path for the simulated leakage current, and the thyristor can be known through the detection results of the double induction coil On-off control chip and timing self-check circuit, this c...

AI Technical Summary

Problems solved by technology

[0002] The leakage detection and protection circuit disclosed in the invention patent application with the application number of 201310452956.0 includes a power input terminal, a power user terminal, a power output terminal, a reset button, a main circuit switch linked with the reset button, and a dual circuit for detecting leakage current and low resistance faults. The induction coil, the tripping coil that drives the built-in iron core through the action of the magnetic field and cooperates with the mechanical structure to make the reset button drive the main circuit switch to close / open, the thyristor that provides a path for the analog leakage current, and the thyristor can be known through the detection results of the double induction coil On-off control chip and timing self-test circuit. This circuit judges whether the function of the detection protection circuit is intact by testing whether it can successfully trip and disconnect the main circuit switch. Whether the control chip IC1) is intact or not requires a more complicated judgment process, so the circuit structure needs to be improved

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