What is the significance of the voltage rating notation Uo/U (Um) (e.g., 6/10 (12) kV) in VDE 0250 specifications?
In international and German VDE standards (specifically VDE 0250), the voltage rating of a cable is not a single value but a set of three parameters. For example, a 6/10 (12) kV rating defines the electrical limits under different operating conditions.
在国际和德国 VDE 标准（特别是 VDE 0250）中，电缆的额定电压不是单一数值，而是一组三个参数。例如，6/10 (12) kV 额定值定义了不同运行条件下的电气极限。