老化交联聚乙烯电缆模型的退化和电气性能

Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics Pub Date : 1989-07-03 DOI:10.1109/ICSD.1989.69219

A. Motori, F. Sandrolini, G. Montanari

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引用次数: 15

摘要

讨论了不同老化时间下交联聚乙烯(XLPE)电缆模型在热应力和热电复合应力作用下的直流电导率测量结果。结果表明，电导率随时效时间的变化与其他性能(密度、结晶度、电强度和微观结构)的变化有关，因此与时效过程有关。电导率是一种整体特性，能够很好地表明绝缘材料由于电应力和热应力而退化，即使电应力引起的失效主要是局部现象。

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Degradation and electrical behavior of aged XLPE cable models

Results of DC electrical conductivity measurements performed at different aging times on cross-linked polyethylene (XLPE) cable models subjected to thermal and combined thermal-electrical stresses are discussed. It is shown that the variations of electrical conductivity with aging time are related to those of other properties (density, crystallinity, electric strength, and microstructure) and hence to the aging processes. Electrical conductivity is shown to be a bulk property well able to indicate the degradation of an insulating material due to electrical and thermal stresses, even if the failure due to electrical stress is primarily a localized phenomenon.<>

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Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics

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