Electric leakage switch having FSK communication function

Abstract

The invention provides an electric leakage switch having an FSK communication function, wherein the electric leakage switch is installed in a power grid and is used for carrying out electric leakage protection on a user terminal and a user. The electric leakage switch is composed of a current transformer T, an amplifying circuit, a tripping circuit, an FSK circuit and a control circuit. The control circuit is used for carrying out effective value calculation on a sampling signal SA; a leakage current effective value P2 is coupled to the power grid through the FSK circuit; an obtained external control signal P3 is decoded so as to control tripping or closing of the tripping circuit. The provided electric leakage switch has the simple circuit; a microprocessor is used for carrying out effective value calculation on the sampling signal of the leakage current, thereby improving the leakage current detection precision; a leakage value effective value can be sent out directly by a power grid so as to realize remote communication; after networking, centralized display processing can be realized, so that an operator on duty can monitor leakage situations of all user timely; a leakage tripping phenomenon can be prevented and a leakage point can be searched rapidly and conveniently; and remote monitoring of an intelligent power grid and electricity leakage with security and reliability can be realized.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a leakage switch with FSK communication function. Background technique [0002] The leakage switch (protector) in the low-voltage power distribution system is one of the effective measures to prevent personal electric shock accidents. It is a technical measure to prevent electrical fires and electrical equipment damage accidents caused by leakage. The leakage classification for low-voltage power grids can be divided into general assembly protection. And the last level (direct user) protection two types. Regardless of the general assembly protection and the final protection, the installation of a leakage switch does not mean absolute safety, and prevention should still be given priority to during operation. [0003] Common forms of leakage include chronic leakage that gradually increases with the decline in the insulation performance of electrical equipment and po...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: In order to solve the technical problem that the existing leakage switch cannot communicate, especially the technical problem that the leakage value networking and early warning cannot be realized, the present invention provides a leakage switch with FSK communication function to solve the above problems

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