摘要
带脱离器的避雷器是一种新型电力设备,当避雷器出现劣化或损坏失效时,脱离器会迅速动作,将故障避雷器从电力系统中退出,近年来,其获得了越来越广泛的应用。介绍了两起现场带脱离器避雷器的缺陷情况,其中一起为通过红外测试发现的内部受潮,另一起则是避雷器异常脱落。对第一起缺陷中的故障避雷器进行直流1m A试验,75%U1m A下泄漏电流试验及解体,验证了红外测试的结果及其有效性。经分析认为两起事故都是由于带脱离器的避雷器密封性能未做好而导致的。
Attester with disconnector is a new type of power equipment. When arrester becoming deterioration or damaged, disconnector will act quickly to cut off the fault arrester from the transmission system. Therefore, in recent years it has been used more and more widely. Tile author introduces two defects of field arrester with disconnector. One is internal moisture found by infrared testing and another is abnormal shedding. DC lmA voltage test, leakage under 75% UlmA test and disintegration have been done to the first one. The results verified the validity and the effectiveness of the infrared testing. Analysis results show that the two accidents are due to disengaging device sealing problem.
出处
《电瓷避雷器》
CAS
北大核心
2015年第4期70-72,77,共4页
Insulators and Surge Arresters
关键词
避雷器
脱离器
红外测试
密封
arrester
disconnector
inirared testing
sealling
