... variable test voltage from 0 to 60, 75, 80, 90 or 100 kV Test as per International standardsDYT series insulating oil ... smoothvariable test voltage from 0 to 60, 75, 80, 90 or 100 kV for testing thedielectric strength of insulating oil in ... variable test voltage from 0 to 60, 75, 80, 90 or 100 kV