一起110千伏油浸式电流互感器电容量异常问题的原因分析

Cause Analysis of Abnormal Capacitance of 110kV Oil Immersed Current Transformer

针对一起油浸式电流互感器电容量增大的案例,通过显著性差异分析识别了故障,经试验、解体分析查明了异常原因为末屏引出至二次接线盒的压接点存在松动缺陷。该案例的分析对电容式电流互感器电容量异常的分析和处置具有一定借鉴意义。

In view of a case fo increasing capacitance of oil immersed current transformer,that fault is identified significant difference analysis.Through test and disassembly analysis,it is found that the abnormal reason is that the crimping contact from the end screen to the secondary junction box is loose.The analysis of this case has certain reference significance for the analysis and disposal of abnormal capacitance of capacitive current transformer.