切换27.5千伏电压互感器转换小开关时,时间为什么不能过长?应控制在几秒?
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Besides saving distance along the track line,another advantage of the Scharnow Turn over the Williamson Turn in a man overboard situation because().
A. it is faster
B. it can be used in both the immediate action and the delayed action situations
C. in fog,if the turn is started as soon as the man goes over,the vessel will be at the point where he went over when the turn is completed
D. it returns the vessel to the original track line on a reciprocal course
你组织本单位一些退休老同志乘火车旅游,不巧遇上暴雨,导致前方铁轨塌陷,火车无法继续行驶,要修复至少需要一天时间,而此时有部分老同志由于连降暴雨而身体不适,这时你怎么办?
根据《钢结构高强度螺栓连接技术规程》JGJ82的规定,在安装工程中,不得使用螺纹损伤及沾染赃物的高强度螺栓连接,不得用高强度螺栓兼作()。
220kV线路的相电压是127kV
A. 正确
B. 错误