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Analysis on Short Circuit Accident of Earthing Switch of Gas Insulated Metal-enclosed Switchgear
Author(s): 
Pages: 106-108
Year: Issue:  11
Journal: Guangdong Electric Power

Keyword:  气体绝缘金属封闭开关设备隔离开关短路事故装配清洁度;
Abstract: 以一起气体绝缘金属封闭开关设备(gas insulator switchgear,GIS)接地开关短路事故为例,分析事故发生的原因是隔离开关气室内金属异物在电场力和机械振动的作用下,引起盆式绝缘子沿面放电,导致绝缘破坏;在重合闸过程中,盆式绝缘子再次发生放电,电弧在气流的作用下,引起隔离开关静触头屏蔽罩与筒壁发生短路,强大的电流导致屏蔽罩烧熔.由此判断厂内装配环境控制不严格以及金属异物等杂质严重威...
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