This specification applies to rotating electrical machines with rated voltages from 5 kV to 24 kV inclusive and with rated output from 5 MVA upwards for generators and from 5 MW upwards for motors. Requirements for machines with rated voltage above 24 kV should remain the subject of individual agreement. This specification is also applicable to machines with rated outputs between 1 MVA (1 MW) and 5 MVA (5 MW) and with rated voltages of 5 kV and above, provided its use has been agreed beforehand.
DS/EN 50209:1999 history
1999DS/EN 50209:1999 Test of insulation of bars and coils of high-voltage machines