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的电涌保护装置，以防止雷电或其他瞬态过电压的间接和直接影响。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，标称系统电压高达 1 000 V（rms）交流和 1 500 V 直流 [外文原描述]： 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.
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