KS C IEC 61466-1:2019 Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V — Part 1: Standard strength classes and end fittings
2019KS C IEC 61466-1:2019 Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V — Part 1: Standard strength classes and end fittings
2003KS C IEC 61466-1:2003 Composite string insulator units for overhead lines with a nominal voltage greater than 1000V-Part 1:Standard strength classes and end fittings