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Direct-acting three-working-position isolation switch moving contact device

A technology for isolating contacts and isolating switches, which is applied in the direction of air switch parts and contact engagement, etc. It can solve the problems of contact welding, uncompact structure, and difficult assembly, etc., and achieves high reliability, simple structure, and convenient installation Effect

Inactive Publication Date: 2012-06-27
CHINA TIANSHUI CHANGCHENG SWITCHGEAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the moving contacts currently used have complex anti-rotation structures, and the components are installed separately. The structure is not compact, it is not easy to assemble, and it does not have the function of guiding and positioning and current isolation, especially for the rated peak withstand current of 31.5kA and above. When the moving contact is inserted, under the action of short-circuit current, first, the pressure of some spring contacts will be reduced or lost, the contact resistance will increase, and the contact will be welded; second, the moving contact and the contact will be welded. The inner wall of the head bracket is in contact, and local welding may also occur

Method used

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  • Direct-acting three-working-position isolation switch moving contact device
  • Direct-acting three-working-position isolation switch moving contact device
  • Direct-acting three-working-position isolation switch moving contact device

Examples

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Embodiment 1

[0019] Embodiment 1: A direct-acting three-position isolating switch moving contact device, including a toroidal isolating contact bracket 1, the torus isolating contact bracket 1 has an inner hole, and the two ends of the inner hole of the isolating contact bracket The coil spring contact finger 5 is installed in the circumferential groove, and the movable contact 7 is inserted in the inner hole of the isolation contact bracket 1, and contacts with the coil spring contact finger 5, at both ends of the inner hole of the isolation contact bracket 1 Between the provided coil spring contact fingers 5, an insulating guide block 4 is arranged symmetrically along the axial direction of the inner hole of the isolating contact bracket 1, and an insulating guide block 4 is provided on the outer wall of the moving contact 7. Matching anti-rotation groove 6. It also includes an insulating screw 8, the insulating screw 8 has threads, the movable contact 7 has an inner hole, and the inner ...

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PUM

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Abstract

The present invention relates to an isolation switch, especially relating to a direct-acting three-working-position isolation switch. The invention provides a direct-acting three-working-position isolation switch moving contact device which comprises a circular ring body isolation contact bracket which has a bore. Circular grooves at two ends of the bore of the isolation contact bracket are provided with spiral spring contact fingers. A moving contact is inserted in the bore of the isolation contact bracket and is in contact with the spiral spring contact fingers. Between the spiral spring contact fingers, insulating guide blocks are symmetrically arranged along an axial direction of the bore of the isolation contact bracket. An outer wall of the moving contact is provided with an anti-rotation groove which is matched with the guide blocks. The invention has the advantages of accurate positioning, simple and compact structure, integral installation, convenient installation, small volume, high reliability, and low cost.

Description

technical field [0001] The invention relates to an isolating switch, in particular to a direct-acting three-position isolating switch. Background technique [0002] With the rapid development of my country's electric power and switchgear manufacturing industry, direct-acting isolating switches and three-position isolating switches are widely used in switch cabinets, especially C-GIS inflatable cabinets, making safe, reliable, high current-carrying, and simple in structure. The movable movable contact structure has been widely used. However, most of the moving contacts used at present have a complex anti-rotation structure, and the components are installed separately. The structure is not compact, it is not easy to assemble, and it does not have the function of guiding and positioning and current isolation, especially for the rated peak withstand current of 31.5kA and above. When the moving contact is inserted, under the action of short-circuit current, first, the pressure of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H31/02H01H1/38
Inventor 于庆瑞马炳烈任召田王宏宏王瑞焦军霞
Owner CHINA TIANSHUI CHANGCHENG SWITCHGEAR CO LTD
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