IEC 60152:1963 pdf download 三相电系统的相导线按小时数进行识别

IEC 60152:1963 pdf download,Identification by hour numbers of the phase conductors of 3-phase electric systems.
三相电系统的相导线按小时数进行识别
1.Object
The object of this recommendation is to identify the conductors of 3-phase interconnected systems
by the use of hour (clock-face) numbers,taking as a basis the phase sequence,starting from an arbitraryorigin,of their applied voltages.
This system of marking with hour numbers takes into account the shift in the phase-voltage vectors
due to interposed power transformers and determined by the winding connection,but it disregards anyshift resulting from the impedances of the conductors and of the transformer windings which willvary with the length and the connected load and which plays no part in this system of conductor identification.
Thus,the same number accompanies a given conductor along its whole length and is subject to change
only when the conductor system "passes through"a transformer.This change in hour number isconstant for a given transformer and indicates the change in position of the voltage vectors introducedby the transformers at no load.
1. 目的
本建议的目的是通过使用小时（时钟）数字，根据应用电压的相序列，从一个任意起点开始，来识别三相互连系统的导线。
此标记小时数的系统考虑了由于中间的功率变压器引起的相电压矢量的偏移，并由绕组连接确定，但忽略了由导线和变压器绕组的阻抗引起的任何偏移，后者将随着长度和连接负载而变化，并且在导线识别系统中不起任何作用。
因此，同一个数字将伴随着给定的导线沿着其整个长度，并且只有当导线系统“通过”变压器时才会发生变化。对于给定的变压器，小时数的这种变化是恒定的，并指示了在空载时变压器引入的电压矢量的位置变化。