Title :
Applications of insulation resistance and high direct voltage ramp tests to the assessment of insulation systems of hydrogenerator stator bars and coils
Author_Institution :
Gen. Electr. Canada, Peterborough, Ont.
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;
Conference_Titel :
Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on
Conference_Location :
Toronto, Ont.
Print_ISBN :
1-4244-0333-2
DOI :
10.1109/ELINSL.2006.1665340
