A thermal cycling type test for generator stator winding insulation

Author

Stone, G.C. ; Lyles, J.F. ; Braun, J.M. ; Kaul, C.L.

Author_Institution

Ontario Hydro, Toronto, Ont., Canada

Volume

6

Issue

4

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

707

Lastpage

713

Abstract

A test has been designed and implemented which cycles the temperature between 40°C and 150°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

Keywords

electric generators; machine insulation; machine testing; stators; circulating currents; cooling air; generator stator winding insulation; insulation delamination process; pumped-storage generators; stator bars; thermal cycling type test; Combustion; Cooling; Delamination; Insulation testing; Manufacturing; Performance evaluation; Stator bars; Stator windings; System testing; Temperature;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.103645

Filename

103645