Determination of gases and gas pressure in GIS spacer voids

Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1989-10-29 DOI:10.1109/CEIDP.1989.69531

J. Braun, J. Groeger

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引用次数: 20

Abstract

The gas contents of voids found in commercial epoxy spacers and laboratory samples are investigated as part of a broader investigation into the aging characteristics of GIS (gas-insulated switchgear) spacers. Gas chromatography techniques were successful in identifying permanent gases and organic vapors in epoxy spacers. Simple crushing and, where practical, drilling were used to release the gaseous effluents. Analyses performed on production epoxy spacers yielded predominantly nitrogen and oxygen with, in much smaller concentrations, uncured residues and curing by-products similar to those dissolved in the epoxy mass. Given the high temperatures at the time of formation of the cavities, diffusion processes in the liquid-like mass will establish rapid equilibrium between the voids and the surrounding epoxy mass. Control of the gas and pressure content in epoxy cavities is similarly difficult to achieve where desired because of diffusion effects in the curing mass. While oxygen depletion can be readily ascribed to reaction with the uncured epoxy, the presence of excess nitrogen cannot yet be explained satisfactorily.<>

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GIS间隔空隙中气体和气体压力的测定

作为对GIS(气体绝缘开关设备)隔离垫老化特性更广泛调查的一部分，研究了商用环氧隔离垫和实验室样品中空隙的气体含量。气相色谱技术成功地鉴定了环氧隔离剂中的永久气体和有机蒸汽。在可行的情况下，使用简单的破碎和钻孔来释放气体废水。对生产环氧隔离剂进行的分析主要产生了氮和氧，其浓度要小得多，未固化的残留物和固化副产物类似于溶解在环氧树脂中的残留物。考虑到空腔形成时的高温，液体状物质中的扩散过程将在空腔和周围环氧物质之间建立快速平衡。由于固化质量中的扩散效应，控制环氧树脂腔中的气体和压力含量同样难以实现。虽然氧的消耗可以很容易地归因于与未固化的环氧树脂的反应，但过量氮的存在还不能令人满意地解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference on Electrical Insulation and Dielectric Phenomena,

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