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Arrestor and method of measuring leakage current of arrestor

A lightning arrester and lightning protection technology, applied in the field of lightning arresters, can solve problems such as the increase of insulating cap 310, and achieve the effects of size reduction, structure simplification, and cost reduction

Active Publication Date: 2012-03-28
JAPAN AE POWER SYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the difficulty is that the insulating cap 310 would be enlarged more than necessary

Method used

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  • Arrestor and method of measuring leakage current of arrestor
  • Arrestor and method of measuring leakage current of arrestor
  • Arrestor and method of measuring leakage current of arrestor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0086] figure 1 The partial sectional view in shows an example of the arrester of the present invention, which belongs to the class of 66 / 77kV.

[0087] In this drawing, the electrical equipment with the lightning arrester of the present invention includes an equipment housing 1, which hermetically accommodates electrical equipment such as switches (not shown in the figure). And, for example for SF 6 Insulating gas such as , etc. is filled into the equipment casing 1 . In addition, an opening portion 1a is provided at the bottom of the device case 1, and the sleeve 2 is installed into the opening portion 1a so that the top end of the sleeve 2 itself is located inside the device case 1, and the sleeve 2 itself The rear end hermetically covers the opening portion 1a. A formed lightning protection element stack 6 is detachably installed in the sleeve 2 , wherein the formed lightning protection element stack 6 has a lightning protection element stack 61 which will be mentioned...

no. 2 approach

[0107] Figure 4 It is a partial sectional view of the arrester according to the second embodiment of the present invention. Meanwhile, in the drawings, the same reference numerals are used to refer to those figure 1 The parts that are the same as the corresponding parts in , and the detailed descriptions are omitted.

[0108] In this embodiment, by making the sleeve 2 from an insulating material such as epoxy resin, a current cut-off area Z can be formed at the rear end of the sleeve 2 leading to the outside of the device housing 1 . Specifically, the current cut-off area Z is located at a portion extending from the end face of the rear end of the lower cylindrical portion 52 as an insulating cylindrical member toward the outer wall of the device case 1 .

[0109] For the lightning arrester of this structure, on the outside of the equipment housing 1, the grounding conductor E is installed in the current cut-off area Z located at the rear end of the sleeve 2—that is, by st...

no. 3 approach

[0112] Figure 5 (a) is a partial sectional view of a lightning arrester according to a third embodiment of the present invention, Figure 5 The plan view in (b) shows the sealing cover in this embodiment. Meanwhile, in the drawings, the same reference numerals are used to refer to those figure 1 The parts that are the same as the corresponding parts in , and the detailed descriptions are omitted.

[0113] exist Figure 5 In (a), the formed lightning protection element stack 6 has: a lightning protection element stack 61 formed by stacking a plurality of lightning protection elements, wherein the lightning protection element uses zinc oxide as a main component; a joint conductor 62, which is installed on the top of the lightning protection element stack 61 side (high-voltage side); a cylindrical pressure metal fitting 64, which is installed to the rear end side (low-voltage side) of the lightning protection element stack 61; and a molded insulator 67d, which is made of a m...

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PUM

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Abstract

An arrestor has a bushing (2) hermetically provided in an opening (1a) of an apparatus case (1), and an arrestor molded body (6) of the invention is removaly installed in the bushing (2). The bushing (2) has a hard, insulative bushing body (3) and a high-pressure shield body (4) embedded in the head section of the bushing body (3) so as to be co-centric with the bushing body (3). The bushing body(3) has a hollow cylinder section (53) provided with a tapered insertion hole (53a), and the high-pressure shield body (4) has a shield body (41). The arrestor molded body (6) has an arrestor elementlayered body (61) formed by layering arrestor elements (61a) having zinc oxide as the main component, and a rubber molded body (67) formed of silicone rubber etc. is provided outside the arrestor element layered body (61).

Description

technical field [0001] The invention relates to a lightning arrester. More specifically, the present invention relates to a lightning arrester having a laminated body (hereinafter referred to as "lightning protection element stack") composed of two or more non-linear resistance elements (hereinafter referred to as "lightning protection element"), The resistance element therein contains zinc oxide as a main component. Background technique [0002] In general, in gas-insulated switchgear installed in power stations or substations, etc., lightning arresters should be installed to protect power equipment such as switchgear or transformers, so as to prevent abnormal voltage from invading through power cables when lightning occurs. of these devices. [0003] So far, existing technologies such as Figure 16 A lightning arrester of the type shown (see, for example, Non-Patent Document No. 1), this lightning arrester having a stack of lightning protection elements 100 is placed ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12H02B13/02H01T1/00H02B13/065H02B3/00
CPCH01C7/12H01C7/126
Inventor 伊藤敦绵引聪史斋藤和弘岩井田武中岛昌俊汪士楠足立和久濑间信幸品川润一
Owner JAPAN AE POWER SYST
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