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Vacuum vessel switching core used by on-load tap-changer

A technology of on-load tap-changing and vacuum bubble, which is applied in electric switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., and can solve the problems of prone to power supply accidents, shortened life of tap-changers, transition contacts, and main on-off Contact burning and other problems, to reduce the maintenance workload, prolong the maintenance cycle, avoid the effect of switching power life

Active Publication Date: 2011-06-08
SHANGHAI HUAMING POWER EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The switching of the transition contact and the main on-off contact and the fixed contact will cause arcing, which will easily cause burnout of the transition contact and the main on-off contact, resulting in shortened life of the tap changer, and also prone to power supply accidents

Method used

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  • Vacuum vessel switching core used by on-load tap-changer
  • Vacuum vessel switching core used by on-load tap-changer
  • Vacuum vessel switching core used by on-load tap-changer

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Embodiment Construction

[0063] 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 described below in conjunction with specific illustrations.

[0064] The M series on-load tap-changer is a combined on-load tap-changer, which is composed of a diverter switch with current conversion and a tap selector for pre-selecting the tap position without current.

[0065] see figure 1 , figure 1 It is a schematic diagram of the appearance of the vacuum bubble switching core used in the on-load tap changer of the present invention. The vacuum bubble switching core includes a switch intermediate insulating cylinder 100, a spring quick mechanism 200 and a switching core part 300. The entire switching core part 300 is installed on the bottom of the switching switch intermediate insulating cylinder 100 through three pillars 310, and the spring quick mechanism 200 is also installed at the bottom of the ...

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Abstract

The invention discloses a vacuum vessel switching core used by an on-load tap-changer, which can mutually exchange with the switching core of the existing M-type on-load tap-changer without changing a switch oil chamber; the vacuum vessel switching core comprises a vacuum vessel transition switching assembly, a neutral point switch and a main through-flow assembly, wherein an upper group and a lower group of triphase cavel-shaped contacts in the main through-flow assembly are combined to put below the vacuum vessel transition switching assembly, and are connected with an original contact by soft connection; the vacuum vessel transition switching assembly is electrically connected with the original neutral point contact by the neutral point switch so as to ensure that the position of the main contact and the position of the neutral point contact do not change. The invention keeps the appearance structure and installation size of the original M-type on-load tap-changer switching core, can conveniently change the original M-type on-load tap-changer switching core on the basis of changing no other components of the original M-type on-load tap-changer, is suitable for replacing and maintaining the existing M-type on-load tap-changer used on site and is suitable for manufacturing new vacuum M-type on-load tap-changers.

Description

technical field [0001] The invention relates to the technical field of on-load tap-changers for power transformers, in particular to a vacuum bubble switching core that can be directly interchanged with the switching core of an existing M-type on-load tap-changer without changing the oil chamber of 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] According to the different types of transformers, the on-load tap-changers are divided into two types: oil-immersed and dry-type, of which oil-immersed on-load tap-changers are used for oil-immersed transformers; dry-type on-load tap-changers are used for dry-type transformer. The oil-immersed on-load tap-changer is also divided into two types: built-in type and externa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/666H01H33/66H01F29/04H01H1/56
Inventor 肖日明肖毅肖申
Owner SHANGHAI HUAMING POWER EQUIP CO LTD
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