Surface resistance of PVC in the presence of salt-fog

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI:10.1109/CEIDP.1997.634578

Hui Zhang, R. Hackam

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引用次数: 4

Abstract

Polymer materials are increasingly being used in a wide range of applications in outdoor and indoor insulation. The aging of polymeric insulation is influenced by the presence of moisture and contamination which gradually change the property of the surface from being hydrophobic into hydrophilic. The modified surface then permits the development of dry band arcing that leads to flashover. It has been suggested that measurements of the surface resistance of insulators in situ might offer a convenient method to characterize its electrical property and thus its performance under operating conditions. In the present paper the surface resistance and the contact angle of polyvinyl chloride (PVC) rod specimens are measured in the presence of salt fog. The dependence of the surface resistance on such parameters as the duration of the wetting, the applied electric stress, the length of the specimen rod and on the time subsequent to die removal from the fog chamber is reported. The contact angle is also measured and is correlated with the surface resistance. The diffusion coefficient of the saline solution into the PVC is determined.

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盐雾存在时聚氯乙烯的表面电阻

高分子材料在室内外保温方面的应用越来越广泛。聚合物绝缘材料的老化受水分和污染的影响，使其表面由疏水性逐渐转变为亲水性。修改后的表面允许干带电弧的发展，导致闪络。有人建议，在现场测量绝缘子的表面电阻可能提供一种方便的方法来表征其电性能，从而表征其在工作条件下的性能。本文测量了盐雾存在下聚氯乙烯(PVC)棒试样的表面电阻和接触角。表面电阻的依赖关系，如润湿的持续时间，施加的电应力，试样棒的长度和随后的模具从雾室取出的时间。接触角也被测量，并与表面电阻相关。测定了盐溶液在聚氯乙烯中的扩散系数。

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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IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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