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