The Induced Over Voltage Test Set or D.V.D.F / I.O.V.W is designed to test the insulation strength between turns and other components within transformers. It is designed as per the BIS and other standard specifications.

How does it work? 

During this test, double the standard voltage is applied to the low-tension (L.T.) terminals for a duration of one minute, with an increased frequency used to limit the magnetizing current.

This setup is a mechanically integrated unit that includes a motor and generator, along with a power and control panel to manage the output voltage. The control panel is equipped to handle motor startup, regulate the generator’s output, and measure the voltage and current for all three phases on both the input and output sides. Additionally, it features a protection circuit to ensure safe operation.