Applications of insulation resistance and high direct voltage ramp tests to the assessment of insulation systems of hydrogenerator stator bars and coils

Author

Gronowski, B.

Author_Institution

Gen. Electr. Canada, Peterborough, Ont.

fYear

2006

fDate

11-14 June 2006

Firstpage

392

Lastpage

395

Abstract

The paper discusses the application of the insulation resistance and polarization index and the high direct voltage ramp tests to the assessment of the integrity of insulation of hydrogenerator stator bars and coils. In the paper, examples of continuously recorded insulation resistance and current measured during the high direct voltage ramp tests are presented for epoxy-mica insulated stator bars of hydrogenerators. The paper defines also new parameters for the interpretation and comparison of various test data obtained from the insulation resistance and the high direct voltage ramp tests

Keywords

coils; electric current measurement; electric resistance measurement; epoxy insulation; hydroelectric generators; insulation testing; machine insulation; machine testing; mica; polarisation; stators; coil; current measurement; direct voltage ramp test; epoxy-mica insulation; hydrogenerator stator bar; insulation assessment; insulation resistance measurement; polarization index; Circuit testing; Coils; Dielectrics and electrical insulation; Electric resistance; Electrical resistance measurement; Insulation testing; Machine windings; Stator bars; System testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on

Conference_Location

Toronto, Ont.

ISSN

1089-084X

Print_ISBN

1-4244-0333-2

Type

conf

DOI

10.1109/ELINSL.2006.1665340

Filename

1665340