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Arrester

A technology for lightning arresters and electrical equipment, applied in the field of lightning arresters, to achieve the effects of simplifying equipment structure, suppressing partial discharge, and preventing gaps

Active Publication Date: 2011-08-03
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the GIS internal gas tank type surge arrester thus constituted, the triple joint ( Hereinafter referred to as "triple junction (triple junction)" is not sufficiently shielded by the high voltage shield 380, so as Figure 7 , Figure 8 As shown in , there is a problem that partial discharge occurs in the air (gap) portion of the triple junction when the electric field goes around to the side of the triple junction.

Method used

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Examples

Experimental program
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Embodiment 1

[0039] figure 1 It is a partial cross-sectional view showing an example of a 66 / 77 kV class lightning arrester of the present invention.

[0040] In this figure, the electrical equipment having the lightning arrester of the present invention is provided with an equipment box 1 that airtightly accommodates electrical equipment such as switches (not shown), and in the equipment box 1, for example, SF 6 gas and other insulating gases. Moreover, an opening 1a is provided at the bottom of the equipment box 1, and a sleeve 2 is arranged in the opening 1a. The front end of the sleeve 2 itself is located in the equipment box 1, and the middle portion of the sleeve 2 closes the opening. The portion 1 a is airtightly covered, and a lightning arrester mold body 6 described later is detachably mounted in the sleeve 2 .

[0041] The sleeve 2 is provided with a hard and insulating sleeve body 3 made of epoxy resin mold body, etc., and a high-voltage shield embedded in the front end of th...

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Abstract

To ensure a surface pressure on the interface between the insertion hole in a bushing and a rubber mold body to prevent a void from occurring. The inventive bushing (2) is provided with an insertion hole (3a) for housing an arrester mold body (6), and a tapered insertion hole (53a) spreading in a conical shape from the high pressure side of the bushing (2) to the low pressure side is provided in a region where electric field of the insertion hole (3a) concentrates. The arrester mold body (6) is provided with a rubber mold body (67) consisting of silicone rubber or the like integrally molded around the outer periphery of an arrester element laminate (61), and the rubber mold body (67) is provided with a conical portion (67b) to be able to be fitted to the tapered inner surface of the tapered insertion hole (53a).

Description

technical field [0001] The present invention relates to a lightning arrester provided with a laminated body (hereinafter referred to as a "surge arrester element laminate") of a plurality of non-linear resistance elements (hereinafter referred to as "surge arrester elements") mainly composed of zinc oxide. A lightning arrester that secures the surface pressure of the interface between the insertion hole of the sleeve and the rubber mold body including the arrester element laminate and prevents the generation of voids. Background technique [0002] Generally, a gas insulated switchgear installed in a power station, a substation, etc. is equipped with a surge arrester to protect electrical equipment such as a switchgear or a transformer from abnormal voltage intrusion from the line during a lightning strike. [0003] In the known prior art, such lightning arresters such as Figure 4 As shown, the arrester element laminate 100 is erected on the bottom 110a of the tank 110 fille...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02B13/02H01C7/10H01C7/12
CPCH01C7/126H01C7/10H01C7/102
Inventor 岩井田武斋藤和弘足立和久濑间信幸汪士楠
Owner FUJI ELECTRIC CO LTD
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