提高试验电压测试断路器均压电容介损真实值的探讨

Improve Examination Voltage to Test The Ture Value of the Measure tanδ of the Capactors

在历年预防性试验中发现断路器端口并联的均压电容介损多数超标,这实际是选择的试验电压不当造成的,如果全部更换就会带来较大的经济损失。但提高试验电压测断路器端口并联的均压电容介质损耗将趋于正常。所以,试验电压应取接近运行的额定电压才能表现其真实性。通过分析,提高试验电压测试断路器并联电容器介损真实值势在必行。

It is often found that the measure tanδof many switch parallel connection capacitors is overfulfill in usual precautionary examination , It is because of the examination voltage . If we replace all capacitors , it will waste a lot of manpower and resource . The measure tanδ will become rare if we increase the examination voltage. So it is necessary to improve examination voltage to test the rare value of the mesure tanδ of the capactors .