电容式电压互感器电容和介损试验的分析

Testing Analysis of Capacitance and Dielectric Loss for the Capacitor Voltage Transformer

为避免电容式电压互感器(CVT)发生故障,必须对其进行预防性实验。首先介绍了电容式电压互感器的结构特点,并基于高压西林电桥的原理,对电容式电压互感器电容和介损测试的接线、试验的方法等进行了分析,提出了试验中注意的问题及各种试验接线的功效。

The preventive experiment must be carried out in order to avoid CVT＇s breaking down. This paper first introduces the structural features of capacitor voltage transformer. And based on balance principal of schering bridge,it analyses the test connections and methods for capacitance and dielectric loss measuring. Some problems needing to pay attention to in testing and the function for different test connection are presented.