Since a single-section insulated capacitive voltage transformer(CVT)consists of two capacitors in series enclosed in a porcelain bushing,the insulation resistance test requires the removal of a bulky primary lead from a height.The insulation resistance test needs to be removed from a height and the bulky primary lead should be removed.During the insulation resistance test,the disassembly time of the lead accounts for 82.3％of the total test time.In this paper,a method is proposed to test the insulation resistance of single-section CVT without removing the high-voltage lead.After field comparison,the test method is proved accurate and reliable,which can significantly improve the test efficiency of CVT insulation resistance test.
维普
万方数据