新老聚乙烯绝缘电缆击穿部位的检验

Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics Pub Date : 1989-07-03 DOI:10.1109/ICSD.1989.69162

R. Naybour

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引用次数: 2

摘要

对放电进行了监测，并在测试击穿的短电缆中进行了定位。这些试验已用于检测预击穿劣化。放电定位系统是新颖的，能够定位有限能量击穿点。并非所有的故障都是在屏幕内部边界区域开始的。在最大电场为30 MV/m的情况下，对新电缆和干老化电缆进行的短期击穿试验中，放电水平在1 pC检测限以上没有逐渐增加。在环境温度下施加电压老化似乎可以提高击穿强度

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Examination of the breakdown site in new and aged polyethylene insulated cables

Discharges have been monitored and located in short lengths of cable tested to breakdown. These tests have been used to detect prebreakdown deterioration. The discharge location system is novel and has enabled limited energy breakdown sites to be located. Not all the breakdowns were initiated at the region of the inner screen boundary. In short-term tests to breakdown on new and dry aged cables at a maximum field of 30 MV/m there was no gradual increase in the discharge level above the detection limit of 1 pC. It appears possible that ageing with applied voltage at ambient temperature can improve the breakdown strength.<>

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

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