KS C IEC 60364-4-44:2020 Low-voltage electrical installations - Part 4-44: Protection for safety- Protection against voltage disturbances and electromagnetic disturbances
2020KS C IEC 60364-4-44:2020 Low-voltage electrical installations - Part 4-44: Protection for safety- Protection against voltage disturbances and electromagnetic disturbances
2013KS C IEC 60364-4-44:2013 Low-voltage electrical installations-Part 4-44:Protection for safety-Protection against voltage disturbances and electromagnetic disturbances