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Preparation method of nonlinear resistance piece for miniaturization GIS lightning arrestor

A technology of non-linear resistors and lightning arresters, applied in the direction of resistance manufacturing, resistors, varistors, etc., can solve the problems of increasing floor area and transportation costs, unsatisfactory, heavy weight, etc., achieve good performance uniformity, and improve production Efficiency, the effect of reducing the pressure ratio

Active Publication Date: 2008-03-12
CHINA XD ELECTRIC CO LTD
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Problems solved by technology

[0002] The arrester for GIS (high-voltage switchgear with sulfur hexafluoride gas as insulation and arc-extinguishing medium) has a large volume and heavy weight, which increases the floor area and transportation costs. In order to reduce the size of the arrester, it is necessary to reduce the resistance core of the arrester. Therefore, the resistance sheet of the resistance core body is required to be miniaturized, and it is an effective technical means to improve the potential gradient of the resistance sheet, while the potential gradient of the existing D5 type zinc oxide nonlinear resistor sheet is low ( 200v / mm), if the size of the resistor is to be reduced, it cannot meet the requirements of the miniaturized GIS arrester for the potential gradient (300-400v / mm) of the nonlinear resistor and the square wave flow capacity

Method used

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  • Preparation method of nonlinear resistance piece for miniaturization GIS lightning arrestor

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with specific examples.

[0021] A kind of preparation method of non-linear resistive sheet for miniaturization GIS lightning arrester, comprises the steps:

[0022] a. Raw material ratio, by mole percentage, including the following components: Additive Bi 2 o 3 : 0.7-0.8%, Sb 2 o 3 : 0.7-0.8%, Cr 2 o 3 : 0.4-0.6%, MnCO 3 : 0.4-0.6%, Co 2 o 3 : 0.9-1.1%, SiO 2 ,: 0.6-0.8%, Y 2 o 3 : 0.1-1%, the balance is mainly ZnO; the specific composition of raw materials is shown in Table 2, and ten optimal formulas have been designed.

[0023] b. Calculate and weigh the additive components and the main ingredient ZnO of each raw material in Table 2, mix and calcinate the additive components first, the calcination temperature is 850°C, keep the heat for half an hour, and then the calcined additive Mixed with the main material ZnO for conventional wet pulverization;

[0024] c. Spray and granu...

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Abstract

The invention discloses a preparation method for the non-linear resistors of high-potential gracient, strong square wave tolerance and good pressure ratio aging performance used for mini-type GIS lightning arrester, which comprises steps as follows: to weight the following additive constituents after mixture making with ZnO as the major ingredient: Bi2O3 of 0.7-0.8 percent , Sb2O3 of 0.7-0.8 percent , Cr2O3 of 0.4-0.6 percent , MnCo3 of 0.4-0.6 percent , Co2O3 of 0.9-1.1 percent , SiO2 of 0.6-0.8 percent and Y2O3 of 0.1-1 percent ; after mixed calcining, the additive constituents are required to have waterproof pulverization mix with ZnO; firing them to form ceramic chip under 1100 degrees centigrade for four hours after granulation mechanism, molding and batching out and making heat treatment after grinding; jet cutting the Al electrodes onto both ends of the ceramic chip and coating the insulating barrier on the circumference surface of the ceramic chip, by which the resistors are produced.

Description

technical field [0001] The invention relates to a preparation method of a non-linear resistance sheet for an arrester, in particular to a preparation method of a non-linear resistance sheet for a miniaturized GIS arrester. technical background [0002] The arrester for GIS (high-voltage switchgear with sulfur hexafluoride gas as insulation and arc-extinguishing medium) has a large volume and heavy weight, which increases the floor area and transportation costs. In order to reduce the size of the arrester, it is necessary to reduce the resistance core of the arrester. Therefore, the resistance sheet of the resistance core body is required to be miniaturized, and it is an effective technical means to improve the potential gradient of the resistance sheet, while the potential gradient of the existing D5 type zinc oxide nonlinear resistor sheet is low ( 200v / mm), if the size of the resistor sheet is to be reduced, it cannot meet the requirements of the miniaturized GIS arrester ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/12H01C7/10H01C17/00
Inventor 马军王玉平胡小定
Owner CHINA XD ELECTRIC CO LTD
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