Fireproof and electric leakage protection switch with automatic detection and self-resetting functions and protection methods

Abstract

The invention relates to a fireproof and electric leakage protection switch with automatic detection and self-resetting functions. The protection switch comprises a control chip, a relay, a voltage reduction circuit, a power source circuit, an electric leakage detection circuit, a fire arc detection circuit, a mains supply detection synchronous circuit and a driving circuit; the electric leakage detection circuit comprises a mutual inductor coil HGQ1; two input lines of A mains supply penetrate through the mutual inductor coil HGQ1; one end of the mutual inductor coil HGQ1 is grounded, and theother end of the mutual inductor coil HGQ1 is connected with the pin of the control chip; the fire arc detection circuit comprises a mutual inductor coil HGQ2; one input line of the mains supply penetrates through the mutual inductor coil HGQ2; one end of the mutual inductor coil HGQ2 is grounded, and the other end of the mutual inductor coil HGQ2 is connected with the pin of the control chip; the voltage reduction circuit comprises a first resistor module, a second resistor module and an electronic switch module; and the first resistor module and the second resistor module are connected in series. The protection protective switch has electric leakage protection, fireproof protection and automatic resetting functions. In addition, the invention further discloses a corresponding electric leakage protection method and a fireproof protection method.

Description

technical field [0001] The invention relates to the technical field of protection switches, in particular to a fireproof and leakage protection switch with automatic detection and self-resetting and a protection method. Background technique [0002] Current leakage protection switches on the market have the following defects: [0003] First, when the mains voltage is too low, there is not enough energy to drive the relay to turn on and off the mains, and the protection switch cannot work normally. [0004] Second, the leakage protection switch does not have the function of detecting and protecting the circuit against the arc. [0005] Third, after the power is cut off, the protection switch cannot be automatically reset when the leakage or arc is removed, and it needs to be manually reset, which is often not reset in time, which will cause great troubles to production and life, such as refrigerators that need to be started 24 hours a day , The impact of industrial equipmen...

AI Technical Summary

Problems solved by technology

[0003] First, when the mains voltage is too low, there is not enough energy to drive the relay to turn on and off the mains, and the protection switch cannot work normally

[0004] Second, the leakage protection switch does not have the function of detecting and protecting the circuit against the arc

[0005] Third, after the power is cut off, the protection switch cannot be automatically reset when the leakage or arc is removed. It needs to be manually reset, and it is often not reset in time, which will cause great troubles to production and life. For example, a refrigerator that needs to be started 24 hours a day , the impact of industrial equipment downtime on production progress, etc.

[0006] Fourth, there is no automatic detection module for the leakage detection transformer itself. If the leakage detection transformer itself is damaged and cannot work, the protection switch cannot identify the leakage and cut off the power, causing a great safety hazard;

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