一起 500 kV HGIS 外置式电流互感器线圈受潮缺陷分析及处理

Analysis and Treatment of An Damping Defect of External Current Transformer Winding of 500 kV HGIS

摘要:

针对一起 500 kV HGIS 外置式电流互感器受潮的案例开展分析，结合该类设备结构，找出了受潮原因，提出了 防潮措施以及受潮电流互感器的干燥措施。通过案例的分析认及处理认为，该类型外置式电流互感器结构在户外运 行时极易导致雨水进入，应加强密封; 当电流互感器线圈受潮时，采用电加热和热风法相结合的方式能够取得较好的 效果。

Abstract:

Based on the analysis of a damping defect of external current transformer of 500 kV HGIS，the reasons of damping are found out and the moisture － proof measures and drying measures are put forward for current transformer． Through the analysis and treatment of the case，it is believed that the rainwater can easily get into this type of external current transformer when it is running outdoors，and the sealing should be strengthened． When the coil of current transformer is damped，the combination of electric heating and hot air method can achieve wonderful results．