交联聚乙烯高压电力电缆在施工过程中的防水控制及处理

针对交联聚乙烯(XLPE)绝缘电力电缆运行过程中进水或者受潮,导致电气绝缘性能和机械性能将急剧下降,严重影响电缆使用寿命的问题,分析了电缆受潮后产生水树对电缆的危害及作用机理,指出施工过程中电缆可能进水的原因及防水措施,阐述了电缆进水后缓冲层充氮气辅助抽真空和芯线充氮气的除水方法及步骤。

Aiming at the decline of electric insulation propertis and Mechanical properties for XLPE cable because of the inside water or damp, which sleeply affect it＇s service life,the mechanism and harm of water-tree in the cable was analysed,the seepage-prevention measures during the construction was put＂ forward, the method to remove dampness by injeted nitrogen was illustrated.