标准摘要
[中文适用范围]： IEC 62505的这一部分适用于单极、两极和三极交流（ac）隔离开关、接地开关和开关，这些开关：设计用于牵引系统中的室内或室外固定安装，并且；以 IEC 60850 中规定的交流线路电压和频率运行。 注 1 IEC 60850 规定了交流牵引系统：15 kV 16.7 Hz、12 kV 25 Hz、12.5 kV、20 kV 以及 25 kV 50 Hz、 12.5 kV、20 kV、25 kV 以及 60 Hz 的 50 kV。注 2：由于交流牵引系统的铁轨通常接地并包含在返回电流路径中，因此所有相对地电压都将在 IEC 60850 规定的容差范围内。然而，相间电压有时会更高，例如在自耦变压器系统中。 [外文原描述]： IEC 62505-2:2016 is applicable to single-pole, two-pole and three-pole alternating current (AC) disconnectors, earthing switches and switches which are designed for indoor or outdoor fixed installations in tractions systems, and operated with an AC line voltage and frequency as specified in IEC 60850. The main changes with respect to the previous edition are as follows: - reflect the latest versions of standards referenced and remove text already included in the IEC 62271 series; - rework Table 1 according to the changes of IEC 62497-1:2010. This publication is to be read in conjunction with IEC 62271-1:2007 , IEC 62271-102:2001 , and IEC 62271-103:2011 .
英文名称Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 2: Disconnectors, earthing switches and switches with nominal voltage above 1 kV