【单选题】
检修工作时凡一经合闸就可送电到工作地点的断路器和隔离开关的操作手把上应悬挂 :___。
A. 止步,高压危险
B. 禁止合闸 ,有人工作
C. 禁止攀登 ,高压危险
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答案
B
解析
暂无解析
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SF6 断路器是用 ___ 作为绝缘介质和灭弧介质。
A. 液态[图片 s_f_6.pn]
B. [ 图片 s_f_6.pn]气体
C. [ 图片 s_f_6.pn]分解的低氟化硫
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