变压器在运行中,若发现轻瓦斯保护装置动作,则应立即对变压器的外部进行检查。
(1)检查变压器储油柜中的油位和油的颜色、气体继电器中的气体量与颜色。
(2)检查变压器本身和强迫油循环系统中有无漏油之处。
如果上述检查均未发现有异常现象,进一步就可通过查气体继电器中气体的性质,必要时还可对变压器油进行取样、化验,进行综合分析来确定故障原因。
气体继电器中气体的性质,可依据表来进行确定。
表 气体继电器中气体性质与颜色对应关系参考表
气体颜色 无色无味 黄色 淡灰色或强臭 灰色或黑色 可燃性 不可燃 不易燃 可燃 易燃 故障性质 空气 木质纸麻等绝缘材料 铁芯
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