Searching for Optimal Connection Schemes for Partial Discharge Testing of Inverter-Fed Rotating Machines

Partial discharge testing of complete, low voltage induction machines using the configurations proposed in the IEC 60034-27-5CD, is discussed. Based on tests performed on a machine with accessible coil terminals, the most promising configurations for type tests and quality control, is proposed and the limits of the IEC 60034-18-41 highlighted.