IEC 62305-4:20 24提供了电气和电子系统电涌保护措施(SPM)的设计、安装、检查、维护和测试要求，以降低结构内雷电电磁脉冲(LEMP)导致永久性故障的风险。 这第三版取消并取代了2010年出版的第二版。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)添加新的资料性附件E和附件F，分别使用光伏装置中的建模和均流确定均流； b)增加关于系统级性能测试方法的新的资料性附件G； c)增加关于SPD保护装置中感应电压的新信息性附件H。

IEC 62305-4:2024 provides requirements for the design, installation, inspection, maintenance, and testing of surge protection measures (SPM) for electrical and electronic systems to reduce the risk of permanent failures due to lightning electromagnetic impulse (LEMP) within a structure.
This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of new informative Annex E and Annex F on the determination of current sharing using modelling and current sharing in PV installations respectively;
b) addition of a new informative Annex G on methods of testing of system level behaviour;
c) addition of a new informative Annex H on induced voltages in SPD-protected installations.