Electric leakage switch having FSK communication function

A technology of leakage switch and function, which is applied in the direction of electrical components, circuit devices, emergency protection circuit devices, etc., can solve the problems that leakage switches cannot communicate, and cannot realize leakage value networking and early warning, etc., and achieve simple circuits and improve detection accuracy Effect

CN103647252AInactive Publication Date: 2014-03-19JIANGSU GUOXING ELECTRIC EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-03-19
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0028] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0029]As shown in the figure, the present invention provides a leakage switch with FSK communication function, which is installed in the power grid to provide leakage protection for the user end and the user, including a current transformer T, an amplifying circuit, a tripping circuit, an FSK circuit and a control circuit; the current transformer T includes a hollow magnetic ring and a secondary coil wound on the hollow magnetic ring, the power line of the power grid passes through the middle of the hollow magnetic ring and is connected to the user end, and the secondary coil is connected to the amplifying circuit, thereby Output the leakage current signal of ...