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2011GOST R 50571-4-44-2011 Low-voltage electrical installations. Part 4-44. Safety requirements. Protection against voltage disturbances and electromagnetic disturbances
2000GOST R 50571.18-2000 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