摘要
对贵州电网的多起SAS-550型电流互感器事故,通过现场检查、返厂解体、雷电侵入波相关性分析等手段进行探讨。检查发现电流互感器的玻璃绝缘筒内壁及电容屏外表面有放电痕迹,经分析是玻璃绝缘筒内部绝缘劣化而造成了绝缘击穿。该型电流互感器发生故障的现象及部位大体相同,导致事故多次发生的原因是产品设计和制造质量存在缺陷。
Aiming at the several accidents of SAS-550 type current transformer occurred in Guizhou Power Grid, investigations of the accidents are carried out in this paper through the on-site inspection, disintegration in manufactory and lightning intruding overvoltage analysis, and it proves that the defects in product design and workmanship are the main cause of the accidents.
出处
《南方电网技术》
2013年第3期117-119,共3页
Southern Power System Technology
关键词
电流互感器
绝缘击穿
电容屏
雷电侵入波
current transformer
insulation breakdown
capacitive screen
lightning incoming wave
