断路器主回路电阻测试结果受试验电流影响的分析

Analysis of the Relation Between Main Circuit Resistance of the Breaker an Test

针对发电机断路器主回路电阻现场测试结果异常增大的现象,分析了以交流大电流通流后测试、带负荷后测试、以及使用超大直流电流3种测试方法的结果,证实断路器主回路电阻测试结果不仅与试验电流大小有关,且与通流时间有关。

For the phenomenon of main circuit resistance abnormal increasing on the generator breaker（GCB）, this paper study the relation between main circuit resistance of the breaker and test current though the test after the large AC current, the test after load-current, and the test with ultra-large DC current, and then we draw the conclusion that the test result of main circuit resistance having relation not only with how much of the current, but also with test time.