Leakage detection protection circuit with lightning protection function

Abstract

The invention discloses a leakage detecting and protecting circuit with a function of preventing impact of lightning and protecting. The leakage detecting and protecting circuit with the function of preventing impact of lightning and protecting is characterized in that tip-ended or arc-faced discharging metal parts are respectively arranged on inner sides of motion metal slices opposite to two main circuit power supplies. The two discharging metal parts are respectively integrated with the motion metal slices of the two main circuit power supplies. The two discharging metal parts are arranged in a protruded and opposite mode at an interval, the same in height and form a discharging device. The leakage detecting and protecting circuit with the function of preventing impact of lightning and protecting has the advantages that elements forming the leakage protection circuit are reduced, used materials and energy are saved, assembly cost is reduced, working efficiency is improved, service life is improved due to the fact that the leakage detecting and protecting circuit can bear hundreds of times of impact from lightning of thousands of voltage instead of only three times which a voltage dependent resistor can bear, service life of the leakage protection circuit is prolonged, manufacture cost is reduced and service life is improved.

Description

technical field [0001] The invention relates to a leakage detection and protection circuit with leakage detection and protection functions applied to a power socket with leakage protection function, and in a power plug. Specifically, the invention relates to a leakage detection with lightning protection function protect the circuit. Background technique [0002] With the continuous development of the power socket and power plug industry with leakage protection function, people have higher and higher requirements for the safety of power socket and power plug with leakage protection function. This just makes people constantly improve the leakage detection and protection circuit with leakage detection and protection function applied in the power socket with leakage protection function and the power plug. [0003] Such as Figure 11 As shown, the common leakage detection and protection circuit is mainly composed of induction coil L1 (1000:1) for detecting leakage current, self-...

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Problems solved by technology

[0010] 1. Usually, the varistor can only withstand 3 instantaneous high voltage shocks exceeding its rated voltage. Therefore, once the varistor is burned, the leakage detection protection circuit will not work normally.

When the user continues to use it without knowing it, it will cause unsafe hazards, and the varistor must be replaced, so the maintenance cost of the leakage protection circuit will be increased virtually.

[0011] 2. A set of discharge metal sheets is set at the power input or power output, which increases the number of components that constitute the leakage protection circuit. On the one hand, it increases the manufacturing cost, and more importantly, increases the assembly cost, which is labor-intensive and time-consuming. Not saving energy

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