Comparative evaluation of glass conducting armour materials for form-wound stator coils

Author

Stranges, M.K.W. ; Hayward, J.E. ; Omranipour, R. ; Dymond, J.H.

Author_Institution

GE Canada Inc., Peterborough, Ont., Canada

fYear

2004

fDate

19-22 Sept. 2004

Firstpage

216

Lastpage

221

Abstract

Semiconducting armour tape with a particulate-loaded binder is typically used for maintaining the ground potential plane within the slot section of a vacuum-pressure impregnated (ATI) stator coil. This paper compares the measured resistances as a function of distance from the ground plane for three commercially available semiconducting glass armour tapes. Results are presented from room temperature resistance tests performed before and after VPI processing, and from an elevated temperature cycle resistance test on the fully processed bars. Similar previous resistance tests and the relative merits of using woven glass and polyester fleece are discussed. The paper also describes results from voltage endurance (VE) tests on different conducting armour and groundwall configurations, and observations of surface deterioration under the ground plane.

Keywords

glass; machine testing; materials testing; polymers; resins; stators; VPI processing; ground potential plane; particulate-loaded binder; polyester fleece; resistance measurement; room temperature resistance test; semiconducting glass armour tape; surface deterioration; temperature cycle resistance test; vacuum-pressure impregnated stator coil; voltage endurance test; woven glass; Coils; Conducting materials; Electrical resistance measurement; Glass; Land surface temperature; Performance evaluation; Semiconductivity; Semiconductor materials; Stators; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on

ISSN

1089-084X

Print_ISBN

0-7803-8447-4

Type

conf

DOI

10.1109/ELINSL.2004.1380527

Filename

1380527