DIN EN 61466-1:1997 Composite string insulator units for overhead lines with a nominal voltage greater than 1 kV - Part 1: Standard strength classes and end fittings (IEC 61466-1:1997); German version EN 61466-1:1997
2017DIN EN 61466-1:2017 Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V - Part 1: Standard strength classes and end fittings (IEC 61466-1:2016); German version EN 61466-1:2016
1997DIN EN 61466-1:1997 Composite string insulator units for overhead lines with a nominal voltage greater than 1 kV - Part 1: Standard strength classes and end fittings (IEC 61466-1:1997); German version EN 61466-1:1997