Hydrogenerator Stator Winding Maintenance Course

Presented by IRIS Power

Overview: The course presented by Dr. Nicolas Dehlinger is intended to provide plant and engineering personnel with the importance design features of hydrogenerators stator windings that can affect maintenance and winding life. More specifically, the electrical, mechanical and thermal design of the windings is reviewed. The main failure mechanisms of the windings are then described (inadequate design/manufacturing, loose windings, thermal aging, load cycling, partial discharges and contamination) are outlined. Since most windings need maintenance or replacement due to insulation problems, the importance of the insulation condition in determining maintenance and life is stressed. Typical off-line tests such as insulation resistance, polarization index, dc ramp, partial discharge and high potential are discussed, followed by a presentation on proven online tests and monitors: thermal, partial discharge and magnetic flux.  The emphasis for each test and monitor will be on applicability to specific windings and practical interpretation. Finally, basic methods to repai the common stator winding problems will be presented.

Who should attend?

Engineering and maintenance personnel who purchase, test, maintain, and/or repair high voltage rotating machines. Consultants, manufacturers and repair shop personnel



Monday, July 13, 2020


9:00 AM—5:00 PM




$200, must register in advance

Attendee Limit: