绝缘电缆

中文字数:2159,中文页数:3  英文字数:1058页数:3

 绝缘电缆在电气领域有着极为广泛的应用。小型电缆长被用于办公室、家庭以及工厂的扩展软线。大型电缆常被用于连接移动距离受限制的机械设备。在某些情况下，轻型电缆可以载负负荷极大的线路。例如需要几千马力才能驱动的拉索。在那些由于树木太多或有无法靠近的楼宇以及其他建筑物而不宜使用明线的地方，可以在配电线路中使用架空电缆、埋地电缆被用于包括大的变电站之间的传输线路等许多地方。一些电力电缆的电压等级可达到765千伏。且负荷可达上百兆瓦。更高电压等级的电缆在不久将会成为现实。
 （电缆）导线间极近的间距以及存在着的绝缘物会在电缆中产生电容。其每一单位长度的电容量较架空线路每一单位的电容量大得多。

 Insulated cables have many applications in the field of eldctric power。Small cables are used as extension cerds around offices，homes，and faxtories.Larger cables are used for connation to machjnes that are movable over restrictes distances.Insome instances portable cabes carryquite heavy electrical loads,as for example the vase of elevrivally driven drag lines,which require several thousand horsepower for operaion.overhead cables find application in distribuion circuits here tree conditionsor proximitu to buildings and other structures make the use of  pen-wire lines impracicable.Underground cables are used in many siuayions,including major transmission ciracitd between large stations,some cable power circuits operate at765kilvots and carry loads of several hundered megawatts,cables of even higher voltage will probably become available soon.

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