Influence of surface and internal defects on polyethylene electrical routine test on VHV cables
Influence of surface and internal defects on polyethylene electrical routine test on VHV cables
复制标题
表面和内部缺陷对聚乙烯超高压电缆电气例行试验的影响
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
H. Auclair
中科院分区：
文献类型：
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作者：
R. Jocteur;E. Favrie;H. Auclair
为了提高聚乙烯电缆绝缘的可靠性，必须消除两类有害缺陷：1-在卷筒常规测试过程中存在的嵌入导电污染物。2-电缆成型附件上可能出现的意外表面缺陷。对特殊样品和商用电缆及附件的实验室研究确定：1-湿度对表面缺陷的危害。例行试验的应用条件，即施加的电压水平和持续时间。对含有短缺陷的样品的寿命曲线进行检查，用针尖模拟，证明了消除有害杂质而不使绝缘老化的可能性。
In order to improve the reliability of polyethylene cable insulation two types of harmful defects must be eliminated: 1- Imbedded conducting contaminants present during the course of routine test on drums. 2- Accidental superficial defects which may appear on the cable moulded accessories. A laboratory study on special samples and on commercially-made cable and accessories determined: 1- The harm of humidity on superficial defects. 2- The conditions of application for the routine test, i. e. the applied voltage level and the duration of time. Examination of the life curves obtained on sample containing short defects, simulated by a needle tip, proved the possibility of elimination of harmful impurities without aging the insulation.