电容式电压互感器介损测试分析

Testing and Analysis of Dielectric Loss of Capacitor Voltage Transformer

电容式电压互感器(CVT)通常可分为有分压抽头和无分压抽头两种,对于无分压抽头的叠装式全密封互感器,介损和电容量的测试易受中间电磁单元的影响。文章就此现象进行了分析,并对不同接线方式下的测试数据进行了比较,指出了在生产应用中存在的常见错误,并提出了解决方案。

Capacitor voltage transformer（CVT） is in general classified into such two types as taps with voltage division and without voltage division.For stack type fully encapsulated transformer without voltage division tap,the test dielectric loss and capacitance are easily subjected to the influence of middle electromagnetic unit.This phenomenon is analyzed in this paper,and different test data at different connection are compared.The mistakes existed in manufacturing is pointed out and the solutions and reasonable suggestions are presented.