Composite vacuum on-load tap-changer switching assembly

A technology of on-load tap change and switch switching, which is applied in the direction of electric switches, high voltage/high current switches, electrical components, etc., to improve the service life of switches and reduce maintenance workload

Active Publication Date: 2012-08-01
SHANGHAI HUAMING POWER EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provi

Method used

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  • Composite vacuum on-load tap-changer switching assembly
  • Composite vacuum on-load tap-changer switching assembly
  • Composite vacuum on-load tap-changer switching assembly

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Embodiment Construction

[0028] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the implementation of the present invention will be further described below in conjunction with specific illustrations.

[0029] see figure 2 , a composite vacuum on-load tap changer switch assembly, the upper bracket is composed of a front upper bracket 110 made of insulating material and a rear upper bracket 120 made of insulating material, the front upper bracket 110 and the rear upper bracket The inner ends of 120 are all semicircular, forming a hoop, and fixed on the insulating main shaft 200 . The lower bracket is composed of a front lower bracket 130 made of insulating material and a rear lower bracket 140 made of insulating material. The inner ends of the front lower bracket 130 and the rear lower bracket 140 are semicircular, forming a hoop form. fixed on the insulating main shaft 200.

[0030] The upper bracket is located above th...

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PUM

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Abstract

A composite vacuum on-load tap-changer switching assembly comprises a transition resistor assembly fixedly installed on an insulation spindle, an upper support and a lower support. A contact assembly, which is installed on the upper support, comprises two transition contacts and one main on-off contact. A vacuum tube assembly, which is installed between the upper support and the lower support, comprises three vacuum tubes and three groups of vacuum tube opening and closing mechanisms. Two vacuum tubes are connected in series with the transition contacts and the transition resistor. One vacuum tube is connected in series with the main on-off contact. A cam, which is installed on a batten of a switch cage body, drives the motion of the three groups of vacuum tube opening and closing mechanisms so that the three vacuum tubes close and disconnect according to a certain opening and closing time sequence. An inner end of a moving contact assembly installed on the lower support clamps a moving contact eduction disc assembly installed on the batten of the switch cage body and an outer end clamps a main contact in a static contact assembly. According to the invention, during switching, electric arc only generates in the vacuum tube. Using the vacuum tube to perform quenching of the arc can not pollute transformer oil in a switch oil chamber so that the switch can be maintenance-free.

Description

technical field [0001] The invention relates to the technical field of vacuum on-load tap-changers, in particular to a composite vacuum on-load tap-changer switching assembly. Background technique [0002] The existing compound on-load tap-changer is an on-load tap-changer that combines the functions of switching and selection into one. The on-load tap-changer is mounted on the transformer cover by means of the switch head flange. [0003] The switching components used for the switching of the existing compound on-load tap-changer are as follows: figure 1 As shown, it includes a switch assembly bracket 1 installed on the insulating main shaft (not shown in the figure) and rotates with the insulating main shaft, a transition resistor 2, a transition contact 3, and a transition contact 4 installed on the switching assembly support 1 , the main on-off contact 5, the outgoing contact 6, and the moving contact 7; among them, the transition contacts 3 and 4 are arranged on both ...

Claims

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Application Information

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IPC IPC(8): H01H1/56H01H33/664H01F29/04
Inventor 肖日明
Owner SHANGHAI HUAMING POWER EQUIP CO LTD
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