2007GB/T 20833-2007 The guide for partial discharge measurements and evaluation on stator bar and winding insulation of rotating machinery
GB/T 20833.1-2016 Rotating electrical machines—The stator winding insulation of rotating electrical machines—Part 1: Off-line partial discharge measurements has been changed from GB/T 20833-2007 The guide for partial discharge measurements and evaluation on stator bar and winding insulation of rotating machinery.