标准摘要
[中文适用范围]: IEC 62505 的这一部分适用于单极和两极交流 (ac) 断路器,这些断路器: 设计用于牵引系统中的室内或室外固定安装,并且;使用 IEC 60850:2014 中指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 50 Hz 时的 25 kV 和 50 Hz 时的 12.5 kV、20 kV、25 kV 以及 50 kV。 60 赫兹。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。尽管如此,相间电压有时会更高,例如在自耦变压器系统中。本标准也适用于断路器的操作装置及其辅助设备。本标准不涉及带有独立手动操作机构的断路器。注 3:不可能为这些断路器规定短路关合电流,而且这种依赖手动操作很可能不符合安全考虑。 [外文原描述]: IEC 62505-1:2016 is applicable to single-pole and two-pole alternating current (AC) circuit-breakers 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 60850:2014. 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; - extend the scope to include single-pole and two-pole circuit-breakers; - 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 , and IEC 62271-100:2008 .
英文名称Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 1: Circuit-breakers with nominal voltage above 1 kV