Electric leakage protection circuit, electric leakage protection device and electric equipment

Abstract

The invention relates to an electric leakage protection circuit, an electric leakage protection device and electric equipment. The electric leakage protection circuit comprises an electric leakage detection unit, an electric leakage induction coil, a first switch, a second switch, a third switch, an unhooking control unit, a capacitor and an unhooking switch; the electric leakage induction coil isconnected with the first switch and the third switch in series through the unhooking switch and then grounded, and the first switch and the third switch are further connected with the second switch and grounded through the capacitor. The electric leakage detection unit is connected with the electric leakage induction coil and the unhooking control unit. When the electric leakage detection unit detects electric leakage, the unhooking control unit controls the first switch and the third switch to be switched on at the same time, and the unhooking switch is switched off. According to the invention, an electric leakage protection function can be realized, an electric leakage protection circuit, an electric leakage protection device and silicon controlled rectifiers in electric equipment are saved, and the whole circuit can be conveniently and completely integrated.

Description

technical field [0001] The invention belongs to the technical field of power supply, and in particular relates to a leakage protection circuit, a leakage protection device and electrical equipment. Background technique [0002] In an AC power supply system, a leakage protection device is required, and the leakage protection device has the function of personal safety protection for users. [0003] Therefore, the electric power department mandates that electric units or families must install leakage protection devices, and the plugs and power sockets of some household appliances are also equipped with leakage protection devices. In this way, the quantity of leakage protective devices used in our country and even in the whole world is huge. [0004] The leakage protection device uses an integrated circuit to detect leakage, and uses the conduction of the thyristor to force the solenoid to have a current flow, causing the decoupling switch of the solenoid to be disconnected. B...

AI Technical Summary

Problems solved by technology

Because the manufacturing process of thyristor is difficult to match with the current integrated circuit manufacturing process or the manufacturing process becomes complicated

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