2
自己查到的一些資料,供大家參卡, 以300/500V為例
rated voltage U。(300V)---the power-frequency voltage to earth for which the cable is designed 額定電壓U。是電線跟地面的電壓
rated voltage U (500V)----- the power-frequency voltage betwwen conductors for which the cable is designed 額定電壓U是導(dǎo)體之間的電壓
Voltage designation 額定電壓表達方法
The cable shall be designated by the rated voltage U。and U expressed in the formed U。/U unless otherwise specified in the appropriate cable standard. 除非適用的電線標準有具體規(guī)定,否則電線的額定電壓應(yīng)該以U。/U的形式表示。
In an a.c. system, the rated voltage of a cable should be at least equal to the nominal voltage of the system for which it is intend. This condition applies both to the value U。and the value U. 在交流系統(tǒng)中, 電纜的額定電壓最少應(yīng)該等于系統(tǒng)的標稱電壓,并且同時適用于U。 和U.
根據(jù)這些資料,大家能不能幫忙解答一下上面的問題。
3
300/500V所代表的是銅線所能通過最大的電壓--額定電壓
額定電壓