Technical library
Does High Voltage Testing Damage A Motor?

Does High Voltage Testing Damage A Motor?

Motor Testing

Maintenance professionals tasked with maintaining electric motor reliability are often concerned with testing their critical motors at voltages well above nameplate levels. It can certainly feel counterintuitive to test a 460V motor to 2,000V or a 4,160V motor to 9,320V. After all, the motor is only rated for this lower voltage, right?


Some may even have had experiences with motor failure following a hipot or surge test at these elevated voltages. These events can create even more hesitation in using high voltage testing as an in-service evaluation technique.

Authors Drew Norman
Download PDF