一起变压器低压侧35 kV避雷器事故分析  

An Accident Analysis of 35 kV Surge Arrester on Low Voltage Side of Transformer

作　　者：张志恒 刘同宝 倪诗坤 ZHANG Zhiheng;LIU Tongbao;NI Shikun(State Grid Lianyungang Power Supply Company,Lianyungang 222000,China)

机构地区：[1]国网连云港供电公司,江苏连云港222000

出　　处：《山东电力高等专科学校学报》2020年第6期23-25,共3页Journal of Shandong Electric Power College

摘　　要：针对某变压器低压侧35 kV金属氧化物避雷器在运行中爆炸事故,进行了现场检查、电气试验和解体检测,确定事故原因是避雷器盖板包裹了绝缘加强护套引起的避雷器受潮。通过优化变压器低压侧避雷器的接线,提高了避雷器的绝缘密封性能。In allusion to the explosion accident of 35 kV metal oxide surge arrester on the low voltage side of a transformer during operation,the on-site inspection,electrical test and disassembly test are carried out.It is determined that the cause of the accident is that the surge arrester is moistened due to the insulating reinforcement sheath wrapped by the arrester cover plate.By optimizing the connection of the surge arrester on the low voltage side of the transformer,the insulation sealing performance of the surge arrester is improved.

关 键 词：避雷器 受潮 高压引线绝缘 

分 类 号：TM862[电气工程—高电压与绝缘技术]