Vacuum tube switching core used for M type on-load tap-changer

A technology of on-load tap change and vacuum bubble, which is applied in the direction of transformers, electrical components, variable inductors, etc., and can solve the problems of prone to power supply accidents, shortened life of tap changers, burning of transition contacts and main on-off contacts. damage and other problems, to reduce the maintenance workload, prolong the maintenance cycle, and avoid the effect of switching power life

Active Publication Date: 2010-06-23
SHANGHAI HUAMING POWER EQUIP CO LTD +1
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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 tube switching core used for M type on-load tap-changer
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  • Vacuum tube switching core used for M type on-load tap-changer

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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 present invention will be further elaborated below in conjunction with specific diagrams.

[0029] 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.

[0030] see figure 1 , figure 1It is a schematic diagram of the appearance of the vacuum bubble switching core used in the M-type on-load tap-changer of the present invention. The diverter switch includes a vacuum bubble switch core 200 and a diverter switch insulation cylinder 100. The shape, structure and size of the diverter switch insulation cylinder 100 are exactly the same as the diverter switch insulation cylinder in the existing switch core. The vacuum bubble switch core 200 is connected to the bottom of the switch insulation barrel ...

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Abstract

The invention relates to a vacuum tube switching core used for an M type on-load tap-changer, which can be exchanged with a switching core of a traditional M type on-load tap-changer without changing a selector switch oil chamber. The vacuum tube switching core comprises a vacuum tube transition changing-over assembly and a main flow passage part, wherein an upper group of three-phase cavel contacts and a lower group of three-phase cavel contacts in the main flow passage part are combined together, placed at the lower part of the vacuum tube transition changing-over assembly and connected with an original main contact through soft connection to ensure that the position of the main contact is not changed. In the invention, the appearance structure and the installation size of switching core of the original M type on-load tap-changer are retained, thereby the switching core of the original M type on-load tap-changer can be conveniently replaced without changing the M type on-load tap-changer and other parts, for example, the structure of the selector switch oil chamber and the position of a connection pile head are not changed. The invention is suitable for the replacement and maintenance of the M type on-load tap-changer used on site and the manufacture of a new M type on-load tap-changer.

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 different types of transformers, there are oil-immersed on-load tap-changers for oil-immersed transformers, and dry-type ones for dry-type transformers. The oil-immersed type is also divided into two types: built-in and plug-in. According to the structure of the on-load tap changer, it can be divided into two types: combined type and compound type. In the ...

Claims

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Application Information

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