Abstract – Partial discharge (PD) testing, both off- and on-line, is widely used by manufacturers and end users of high voltage generators and motors to assess the insulation condition of the stator winding to aid maintenance planning. The widespread use of this technology lead to the development of standards such as IEEE 1434, IEC 60034-27-1 and IEC 60034-27-2 that provide guidance on uniform methods of measurement and data interpretation.
