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Bushing and method for filtering and/or processing oil of bushing

A bushing and oil technology, which is applied in the field of high-pressure or ultra-high-pressure bushings, can solve the problem that oil filtration takes a long time, and achieve the effect of reducing time

Inactive Publication Date: 2016-03-09
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Since the transformer contains a large amount of oil, the oil filtration treatment takes a long time, and the maintenance of the bushings is affected by the regular maintenance of the transformer's oil, without any possibility of arranging this treatment differently

Method used

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  • Bushing and method for filtering and/or processing oil of bushing
  • Bushing and method for filtering and/or processing oil of bushing
  • Bushing and method for filtering and/or processing oil of bushing

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Embodiment Construction

[0027] The invention is based on the idea that a valve system carried by the body of the bushing is capable of filling the bushing oil under vacuum operation according to two different open-closed configurations, enabling proper filtration of the filtered oil during the filtration process. flow and enable proper oil flow for cooling during bushing normal operation.

[0028] as in figure 1 As seen in , the bushing 1 according to the invention comprises a substantially cylindrical outer body 2 made up of several parts 3, 4, 6, 7 connected to each other.

[0029] as in figure 2 As seen in , this outer body or housing 2 extending along the longitudinal direction AX encloses a central straight conductor 8 such as a rod or tube extending along the direction AX, and the conductor 8 is cylindrical and extends along the direction AX Extended grading capacitors 9 surround. The grading capacitor 9 consists of oil-impregnated paper wound on an inner metal tube 10 .

[0030] There is ...

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PUM

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Abstract

A bushing (1) comprising a body (2) enclosing a central conductor (8), a grading capacitor (9) made by oil impregnated paper surrounding the central conductor (8), a gap (12) between an exterior surface of the grading capacitor (9) and an interior surface of the body (2), a ring seal (18) surrounding the grading capacitor (9) to separate the gap (12) into a first and a second part (19, 21), at least on valve system (13) and : - a first valve (14) allowing communication of the first part (19) with the exterior plant when in the open position during the treatment process ; - a second valve (16) allowing communication of the second part (21) with the exterior plant when in the open position during the treatment process ; - a third valve (17) closed during the treatment process, and open during the normal service to allow communication of the first and second parts (19, 21).

Description

technical field [0001] The invention relates to a high-voltage or extra-high-voltage bushing for DC or AC power transmission systems, wherein the primary insulator of the bushing, ie its grading capacitors, is based on oil-impregnated paper (OIP) technology. Background technique [0002] In such systems it is important to maintain the proper insulation rating of the bushings through periodic decontamination and treatment of the impregnating oil contained in the bushings. This process is necessary to remove moisture, dissolved gases and any other kind of solid contamination such as residues from the casing manufacturing process or from natural aging of paper or oil. [0003] Such casings consist of a central tube, generally constructed of aluminum, covered by a solid cylinder of wound paper comprising several aluminum foils. This solid cylindrical part, called a grading capacitor, is generally enclosed in a cylindrical body called an insulator, which realizes the external in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/58H01B19/00
CPCH01B17/34H01F27/04H01F27/14
Inventor 乔瓦尼·泰斯丁奇安马可·巴特里诺米洛德·塞豪瓦克马尔科·帕沃内
Owner GENERAL ELECTRIC TECH GMBH