For telecommunication lines, when its outside part uses optical fiber cable and at the entrance of building it is then changed to metallic line, such as twisted pair or coaxial cable. 关于电信线缆,当它的外部使用光纤电缆,而在建筑的入口处改成了金属电缆,如双绞线或同轴电缆。
The maximum lightning overvoltage on the entrance cable and the equipment are presented with the different operating modes and different length of cable. 计算了在架空进线所接电缆段不同长度情况下,雷击架空进线保护段外产生的侵入波传递到该变电站时,电缆段和变电站设备上的雷电过电压最大值。
It is crucial to limit the overvoltage of cable entrance, and the arresters installed at cable terminal and GIS are unnecessary. 过电压保护的关键在于限制电缆首端的过电压,电缆末端和GIS不需加装避雷器;
Reinforcing ground creep at entrance of tunnel by prestressed anchor cable 预应力锚索加固隧道洞口蠕滑山体