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Bushing

A sleeve and insulating core technology, applied in the field of indoor or outdoor sleeves and the construction of the sleeves, can solve the problems of no cost efficiency and the like, and achieve the effect of easy manufacturing

Inactive Publication Date: 2007-01-10
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no cost effective and reliable known method to have a protective layer that keeps moisture away from the epoxy

Method used

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Embodiment Construction

[0026] Description of preferred embodiments

[0027] The following description refers to both methods and apparatus.

[0028] figure 1 A bushing according to a preferred embodiment of the invention is shown. The bushing comprises, an insulating core 1 comprising a diffusion barrier 2 . Diffusion barrier 2 consists of a continuous membrane, the figure 1 wherein it covers substantially the entire surface of the insulating core. The central tube 3 is arranged in the center of the casing. The central tube 3 may or may not be in the current carrying path. The insulating core is made, for example, of a composite material comprising epoxy, such as epoxy resin impregnated paper (RIP). Insulating cores can be produced by wrapping paper and equalizing plates on a central tube, then impregnated with resin in a mould. These equalization plates (not shown) are made of metal foil, preferably aluminum foil, or conductive ink, and are used to control the electric field inside and outsi...

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Abstract

A bushing for an electrical device, comprising an insulating core (1, 7, 9), where at least a part of the insulating core (1, 7, 9) comprises a continuous diffusion barrier (2, 8) with firm adhesion to the insulating core (1, 7, 9). The bushing is manufactured by coating at least a part of the insulating core (1, 7, 9) with the continuous diffusion barrier (2, 8). Use of a bushing in a transformer.

Description

technical field [0001] The present invention relates to an indoor or outdoor bushing and a method of constructing said bushing. Background technique [0002] The main function of bushings is to carry current across a grounded barrier, such as the wall or casing of an electrical device. The bushing prevents current from entering the ground barrier by virtue of its insulating properties. The jacket is constructed with or without a condenser. [0003] A condenserless bushing consists of a current carrying center conductor surrounded by a solid, liquid or gaseous dielectric medium and ceramic or elastomeric insulator. [0004] Condenser bushings for medium and high voltages have an additional piece called an insulating core that aids in the distribution of the electric field along the length of the bushing. The insulating core is disposed around the center tube in the current carrying path of the bushing. For some types of bushings, the center tube is not in the current carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/26H01B17/30H01F27/04
CPCY10T16/063H01B17/303Y10T16/05Y10T29/49002H01F27/04
Inventor 彼得·伊斯贝里卡里纳·欧内比埃里克·约翰松托马斯·利廷贝里道格拉斯·吉特森
Owner HITACHI ENERGY SWITZERLAND AG
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