问题
问答题 简答题
交流电气化铁路光电综合缆线路设置屏蔽地线的间隔和接地电阻有何要求?
答案
参考答案:受交流电气化铁路影响的光电综合缆线路,其金属护套应单设专用的屏蔽地线,屏蔽地线间距不宜大于4KM。其接地电阻,在通信站不应大于1Ω,在变电所及分区亭附近不应大于2Ω,车站及其他接地点不宜大于4Ω。
交流电气化铁路光电综合缆线路设置屏蔽地线的间隔和接地电阻有何要求?
参考答案:受交流电气化铁路影响的光电综合缆线路,其金属护套应单设专用的屏蔽地线,屏蔽地线间距不宜大于4KM。其接地电阻,在通信站不应大于1Ω,在变电所及分区亭附近不应大于2Ω,车站及其他接地点不宜大于4Ω。
请阅读下面这篇文章,根据所提供的信息,完成下面表格,把答案写在答题卡指定的位置上。 Dear friend, I am from America.My name is Barry Hall.I am a 13-year-old boy and I study in Green Middle School of New York.My birthday is August 10th. I go to school from Monday to Friday.We have four classes in the morning and two in the afternoon.At school,I like math,history and PE.My PE teacher’s name is Paul.He is young and very healthy.After school,some boys and I often play soccer with him.I like playing computer games and painting very much. I like China and I want to have a pen friend from China.Do you want to be my pen friend?Please write and tell me about you and your family.My e-mail address is Barry-h@hotmail.com.
|