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高压电器  2015 

一起气体绝缘金属封闭开关设备悬浮放电缺陷分析

DOI: 10.13296/j.1001-1609.hva.2015.10.034, PP. 205-208

Keywords: 气体绝缘金属封闭式开关设备,局部放电,特高频法,悬浮放电

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Abstract:

文中分析了一起典型的气体绝缘金属封闭开关设备悬浮放电缺陷。通过局部放电特高频检测确定了故障位置,根据信号特征判断缺陷类型为悬浮放电。经解体检查,发现隔离开关动触头U型座套与绝缘拉杆之间的连接销钉位置存在明显放电痕迹,销钉尺寸不满足设计要求。销钉与U型座的在隔离开关分闸状态下,由于配合不当造成连接不良,形成了悬浮电位。

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