Matl - WG1310 - Materials SC - Thermal Cycle Testing of Form-Wound Stator Bars and Coils for Large Generators

Large motor and generator stator windings may suffer from insulation problems caused by frequent and rapid load shifts. A large Working Group is revising the first version of a test procedure to simulate this failure process. The purpose is a well-defined test procedure that is performed in the same way by all test organizations that can judge the relative ability of different insulation systems to resist "thermal cycling". Based on experience gained in the past 10 years with the first version of IEEE 1310, the WG is further tightening the test procedure to reduce variability. No specific pass-failure criteria will be included. The work is well advanced and a final version will be voted on in 2011.