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Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer

A technology of on-load tap change and vacuum bubble, which is applied in the direction of electric switch, high-voltage/high-current switch, high-voltage air circuit breaker, etc., and can solve the problem of short service life of tap changer, prone to power supply accidents, transition contacts, main on-off Contact burnout and other problems to achieve the effect of avoiding pollution, reducing maintenance and material consumption

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

AI Technical Summary

Problems solved by technology

[0006] 1. The switching of the transition contact and the main on-off contact and the fixed contact will generate an arc, causing the transition contact and the main on-off contact to burn out, resulting in a short service life of the tap changer, and also prone to power supply accidents

Method used

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  • Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer
  • Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer
  • Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer

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Embodiment Construction

[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with specific illustrations.

[0022] Such as figure 1 , figure 2 , image 3 As shown, the switching core of the on-load tap-changer of the present invention is divided into three groups of vacuum-bubble group units by 12 vacuum bubbles, and replaces the three-phase copper-tungsten contacts of the existing on-load tap-changer for switching.

[0023] Twelve vacuum bubbles 620 are arranged between the upper and lower splints according to the circumference, and every 4 vacuum bubbles 620 form a group to form a transition switching unit of one-phase vacuum bubbles. The upper ends of the four vacuum bubbles V1, V2, V3, and V4 of each phase of the vacuum bubble transition switching unit are connected by an arc-shaped conductive plate 610 included in the upper splint (not shown ...

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Abstract

The invention discloses a vacuum tube group for replacing a copper-tungsten contact group of an on-load tap changer, which comprises three vacuum tube group units, wherein each vacuum tube group is a one-phase vacuum tube transitional switching unit; three-phase vacuum tube group units are arranged on the circumference by 120 degrees; and each phase vacuum tube transitional switching unit consists of four vacuum tubes which are distributed according to the circumference. The on-load tap changer generates electric arc only in the vacuum tube during switching without generating electric arc outside the vacuum tubes, thereby no electric arc is generated in an oil chamber of the on-load tap changer and oil of insulated transformer in the oil chamber cannot be polluted by electric arc; and the invention can maintain the insulating performance of the oil in the transformer for a long term, greatly reduce the fault rate of the changer, simultaneously reduce the maintenance of the changer and material loss and prolong the service life of the changer and the transformer.

Description

technical field [0001] The invention relates to the technical field of on-load tap-changers for power transformers, in particular to a vacuum bulb group that replaces the copper-tungsten contact group of the existing on-load tap-changer, so that the on-load tap-changer actually becomes a vacuum on-load tap changer. Connect the switch. Background technique [0002] The on-load tap-changer is used in power transformers or industrial transformers. It taps when the transformer does not interrupt the load current (that is, under load), changes the turns ratio of the transformer, and adjusts the output voltage of the transformer. [0003] Among them, the combined on-load tap-changer is composed of a diverter switch with current conversion and a tap selector for pre-selecting the tap position without current. The diverter switch includes a diverter switch core and a diverter switch oil chamber. The diverter switch core is mainly composed of a diverter switch insulating cylinder, u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F29/04H01H33/66H01H33/666
Inventor 肖日明肖毅
Owner SHANGHAI HUAMING POWER EQUIP CO LTD
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