220 kV电流互感器故障原因分析

通过介绍220kV电流互感器绝缘结构、故障形成原因及故障诊断方法，同时列举了油中溶解气体含量超标及红外测温异常2个实例，提出了电流互感器事故预防措施，指出高压电流互感器的主要故障多由于受潮和放电，当试验结果出现异常时应进行综合分析判断。

Cause Analysis on 220 kV Current Transformer Faults

Through introdudng the insulation structure of current transformer, fault formed reason, and fault diagnosis method of 220 kV current transformer, simultaneously, enumerating two example of dissolved gas content exceeding standard in the oil and infrared thermometric abnormity, this paper bring forwards the preclusive measures of current transformer fault. When the test result is abnormal, comprehensive analysis and judgement should be paid to the high voltage current transformer fault which occurs almost on account of being moistened and discharged.