High-Voltage High-Frequency Testing for Medium-Voltage Motor Insulation Degradation

Most of the present high-voltage high-frequency insulation material testing focuses on the thermal and electrical properties of transformer oil and cable insulation. This paper elucidates the methodology and the experimental setup for high-voltage high-frequency testing of motor winding insulation. The experimental setup gives a pulsed output of voltages ranging from 2 kV till 10 kV peak-to-peak. The experimental setup is used to test the insulation material Kapton HN at different thicknesses [1mil, 2mil, 3mil and 5 mil) at a frequency of 3kHz. Results of the breakdown tests as well as the experimental setup are discussed in this paper.