建筑物电气装置 第4部分:安全防护 第44章:过电压保护 第442节:低压电气装置对暂时过电压和高压系统与地之间的故障的防护
Electrical installations of buildings—Part 4:Protection for safety—Chapter 44:Protection against overvoltages—Section 442-Protection of low-voltage installations against temporary overvoltages and faults between high-voltage systems and earth