标准摘要
[中文适用范围]： IEC 61643-21:2025适用于用于防护雷电间接和直接效应或其他瞬态过电压的防浪涌装置。这些装置旨在连接到电信和信号网络，以及额定电压不超过1 000 V RMS和1 500 V DC的设备。这些电信和信号网络还可以在同一线上提供电力，例如以太网供电（PoE）。本文件规定了这些装置的性能和安全要求、测试方法及额定值。这些装置至少包含一个限压元件（钳位或切换），旨在限制浪涌电压并分流浪涌电流。本版第二版取消并替代了2000年首次发布的第一版、2008年的第1次修订和2012年的第2次修订。本版构成技术修订。与前一版相比，本版包括以下重大技术变更：a）基于IEC 61643-01:2024的IEC 61643-21的新结构；b）增加了基于IEC 61643-01:2024的多项安全要求。本国际标准应与IEC 61643-01:2024一起使用。 [外文原描述]： IEC 61643-21:2025 is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages. These devices are intended to be connected to telecommunications and signalling networks, and equipment rated up to 1 000 V RMS and 1 500 V DC. These telecommunications and signalling networks can also provide power on the same line, e.g. Power over Ethernet (PoE). Performance and safety requirements, tests and ratings are specified in this document. These devices contain at least one voltage-limiting component (clamping or switching) and are intended to limit surge voltages and divert surge currents. This second edition cancels and replaces the first edition published in 2000, Amendment1:2008 and Amendment 2:2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) New structure of IEC 61643-21 based on IEC 61643-01:2024; b) Several safety requirements based on IEC 61643-01:2024 have been added. This International Standard is to be used in conjunction with IEC 61643-01:2024.
英文名称Low voltage surge protective devices - Part 21: Surge protective devices connected to telecommunications and signalling networks - Requirements and test methods