GOST R 50571.18-2000 建筑物的电气装置.第4部分:安全防护.第44章:过电压保护.第442节:低压电气装置的高压系统与地之间的故障防护
Electrical installations of buildings. Part 4. Protection for safety. Chapter 44. Protection against overvoltages. Section 442. Protection of low-voltage installations against faults between high-voltage systems and earth