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Method and device for detecting breaking and closing positions of vacuum circuit breaker contacts

A technology for vacuum circuit breakers and detection devices, which is applied to high-voltage air circuit breakers, measuring devices, and electrical devices, etc., and can solve the problems of inability to detect the opening and closing positions of contacts and high mechanical reliability requirements for auxiliary contacts, etc.

Inactive Publication Date: 2014-12-24
SHENYANG POLYTECHNIC UNIV
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AI Technical Summary

Problems solved by technology

The existing technology generally adopts the method of detecting auxiliary contacts. However, this method requires high mechanical reliability of the auxiliary contacts. Once a mechanical failure occurs, the detection of the opening and closing positions of the contacts cannot be realized.

Method used

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  • Method and device for detecting breaking and closing positions of vacuum circuit breaker contacts

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further explained in detail below.

[0020] like figure 1 As shown, the device for detecting the opening and closing positions of the vacuum circuit breaker contacts includes a copper foil 3, a vacuum circuit breaker, and a detection processing unit 4, wherein the copper foil 3 is attached to the surface of the vacuum circuit breaker, and is connected with the shielding cover 2 The copper foil 3 is connected to the input end of the detection processing unit 4 through wires. In the present invention, the copper foil 3 is bonded to the outer surface of the vacuum circuit breaker, and its position is adjusted to be at the same height as the shield cover 2 in the arc extinguishing chamber 1. The detection processing unit 4 detects the induced electric field value on the copper foil, and when the vacuum circuit breaker ...

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Abstract

A method and device for detecting breaking and closing positions of vacuum circuit breaker contacts are provided. According to the method, due to the fact that capacitance of a shielding case changes when the vacuum circuit breaker contacts break and close, a capacitance value of the shielding case is calculated by detecting a value of a copper foil induced electric field at the position of the shielding case on the surface of a vacuum circuit breaker, and the breaking and closing positions of the contacts are determined. The device comprises copper foil, an electric field sensor and a detecting and processing unit, wherein the copper foil as high as the shielding case is attached to the surface of the vacuum circuit breaker and connected to the input end of the detecting and processing unit through a lead. By means of the method, the breaking and closing positions of the contacts in an arc extinguishing chamber of the vacuum circuit breaker are acquired indirectly by detecting the value of the induced electric field at the position of the shielding case on the surface of the vacuum circuit breaker. The device is simple in structure, convenient to use, low in cost and high in detection sensitivity.

Description

technical field [0001] The invention relates to a method and a device for detecting the opening and closing position of a contact, in particular to a method and a device for detecting the opening and closing position of a vacuum circuit breaker, belonging to the detection field. Background technique [0002] With the development of economy, the improvement of technology and information level, and the increasingly prominent global resource and environmental problems, the reliable power supply of power grid has become extremely important to users. Vigorously promoting the intelligentization of power grids has become a new challenge under the current situation of my country's power grid construction. The strong smart grid is a whole composed of various power equipment after intelligentization. The so-called intelligentization of power equipment does not mean the change of the basic principle of the equipment, but refers to the status visualization and digitalization of measurem...

Claims

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Application Information

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IPC IPC(8): H01H33/66G01B7/00
Inventor 侯春光王兴华赵洋曹云东
Owner SHENYANG POLYTECHNIC UNIV
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