中压电缆电压等级在海外项目中的正确选择

Correct Selection of Voltage Levels of Medium-voltage Cablesin Overseas Projects

梳理电缆电压的定义和电力系统的接地分类,介绍全球影响力大的电缆标准里中压电缆的电压标识,并按美国、加拿大,其他典型国家及国际电缆标准分别说明如何正确选择中压电缆的电压等级,并强调IEC标准对线电压高于1 kV不超过35 kV的规定。

This article sums up the definitions of cable voltages,the grounding classification of power systems,the voltages identification of medium-voltage cables in the global influential power standards,gives the way to select the voltage levels of medium-voltage cables according to the national cable standards of typical countries such as U.S.and Canada,and the international cable standards,and particularly points out that it is required in the applicable IEC standard that the line voltage be between 1 kV and 35 kV.