KS C IEC 61800-4-2020 Adjustable speed electrical power drive systems-Part 4:General requirements-Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding 35 kV
2020KS C IEC 61800-4-2020 Adjustable speed electrical power drive systems-Part 4:General requirements-Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding 35 kV
2005KS C IEC 61800-4:2005 Adjustable speed electrical power drive systems-Part 4:General requirements-Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding 35 kV