GB/T18802.12—2024目次前言...........................................................................................W引言...........................................................................................K1范围...........................................................................................12规范性引用文件.................................................................................13术语、定义和缩略语...........................................................................23.1术语和定义..............................................................................23.2本文件中缩写术语和缩略词列表（见表1和表2）.................................................................................134保护需求....................................................................................155被保护的系统和设备............................................................................155.1总则...................................................................................155.2低压电源系统...........................................................................155.3被保护设备特性.........................................................................186电涌保护器....................................................................................186.1SPD基本功能...........................................................................186.2补充要求...............................................................................186.3SPD分类...............................................................................196.4SPD特性...............................................................................206.5SPD特性的补充资料.....................................................................217SPD在低压电源系统的应用...............................................................267.1概述...................................................................................267.2根据试验类别确定SPD安装位置..........................................................277.3SPD保护模式及安装.....................................................................277.4影响SPD保护效果时需考虑的因素........................................................297.5SPD特性的选择........................................................................347.6辅助装置的特性.........................................................................42附录A（资料性）本文件与IEC61643-12:2020相比的结构变化情况..................................44附录B（资料性）本文件与IEC61643-12：2020的主要技术差异及其原因.............................45附录C（规范性）选用SPD的典型资料及试验程序的解释...........................................46附录D（资料性）UC和系统标称电压之间的关系示例及金属氧化物压敏电阻（MOV）UP和UC之间的关系示例...........................................................54附录E（资料性）环境-低压系统（LV）中的电涌电压..............................................56附录F（资料性）部分雷电流计算................................................................61附录G（资料性）由高压系统和地之间故障引起低压系统的ToV.......................................................................63附录H（资料性）配合规则和原则................................................................77GB/T18802.12—2024附录I（资料性）应用示例.......................................................................
