Laboratory aging of TR-XLPE cables at 500Hz

被引：0
|
作者：
Person, TJ [1 ]
Mendelsohn, A [1 ]
机构：
[1] Dow Chem Co USA, Somerset, NJ 08873 USA
来源：
CONFERENCE RECORD OF THE 2004 IEEE INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATION | 2004年
关键词：
D O I：
10.1109/ELINSL.2004.1380673
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Two 15kV cables insulated with 5.6mm of tree-retardant cross-linked polyethylene (TR-XLPE) have been subjected to wet-electrical aging at 5.9kV/mm (150V/mil) and 500Hz. A daily thermal load cycle is induced, with 8 hours of 50Hz current and a 16-hour cool in the ambient tank water. The insulation shield temperature in water reaches 45degreesC at the end of the heating cycle, similar to the AEIC Accelerated Water Treeing Test. The condition of the aged cable has been assessed after 3 months and 6 months of aging by a series of diagnostic tests. Breakdown strength and dissipation factor measurements are similar at the two aging times, indicative of an extremely slow aging mechanism. Water-treeing characterization after 6 months of aging is compared to evaluations after various aging times at 60Hz as per the Accelerated Water Treeing Test protocol. The results of the 500Hz aging program indicate a much lower degree of aging acceleration for TR-XLPE insulated cables than is predicted by models in the literature for XLPE cables.
引用
收藏
页码：518 / 522
页数：5
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