A thermal cycling type test for generator stator winding insulation

A test has been designed and implemented which cycles the temperature between 40 degrees C and 150 degrees C in about 80 min by the use of circulating currents and cooling air. The test has been successfully used to evaluate the relative performance of similar stator bars made by three different man...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 1991-12, Vol.6 (4), p.707-713
Main Authors: Stone, G.C., Lyles, J.F., Braun, J.M., Kaul, C.L.
Format: Article
Language:English
Subjects:
A.c. Machines
Applied sciences
Combustion
Cooling
Delamination
Electrical engineering. Electrical power engineering
Electrical machines
Exact sciences and technology
Insulation testing
Manufacturing
Performance evaluation
Stator bars
Stator windings
System testing
Temperature
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Summary:A test has been designed and implemented which cycles the temperature between 40 degrees C and 150 degrees C in about 80 min by the use of circulating currents and cooling air. The test has been successfully used to evaluate the relative performance of similar stator bars made by three different manufacturers. The thermal cycling test was able to duplicate the insulation delamination process and presumably those insulation systems which performed well in the thermal cycling test could last longer in service. In addition to being used for pumped-storage generators, the thermal cycling test may be useful to evaluate the insulation system in combustion turbine generators.< >
ISSN:0885-8969
1558-0059
DOI:10.1109/60.103645