标准摘要
[中文适用范围]： 本国际标准适用于电信和信号网络防雷击或其他瞬态过电压的间接和直接影响的浪涌保护器件（SPD）。这些 SPD 的目的是保护连接到电信和信号网络的现代电子设备，其标称系统电压高达 1000 V（均方根）交流电和 1500 V 直流电。 [外文原描述]： IEC 61643-21:2000+A1:2008 is applicable to devices for surge protection of telecommunications and signalling networks against indirect and direct effects of lightning or other transient overvoltages. The purpose of these SPDs is to protect modern electronic equipment connected to telecommunications and signalling networks with nominal system voltags up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c. The contents of the corrigendum of March 2001 have been included in this copy. This consolidated version consists of the first edition (2000) and its amendment 1 (2008). Therefore, no need to order amendment in addition to this publication.
英文名称Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Performance requirements and testing methods