HD 60364-4-442:2012 低压电气装置 第 4-442 部分：安全保护 保护低压装置免受因高压系统接地故障和低压系统故障引起的暂时性过电压
Low-voltage electrical installations - Part 4-442: Protection for safety - Protection of low-voltage installations against temporary overvoltages due to earth faults in the high-voltage system and due to faults in the low voltage system
The rules of this Part of IEC 60364 are intended to provide requirements for the safety of electrical installations in the event of voltage disturbances and electromagnetic disturb...