Effect of surge testing on unimpregnated ground insulation of VPI stator coils

Author

Stranges, Meredith K W ; Snopek, David A. ; Younsi, A. Karim ; Dymond, James H.

Author_Institution

GE Ind. Syst., GE Canada Inc., Peterborough, Ont., Canada

Volume

38

Issue

5

fYear

2002

Firstpage

1460

Lastpage

1465

Abstract

The IEEE 522 guide for testing turn-to-turn insulation in form wound coils for alternating-current machines is currently under working group review, with the intent to eliminate problems in interpretation and application. The guide is written for the testing of fully processed coils, while the motor industry uses the test guide for pre-impregnated vacuum-pressure-impregnated coils wound in the stator core. The impact of applied surge voltages on the ground insulation was investigated using finite-element analysis of stress and testing on actual coils. This paper presents data on surge testing of turn and ground insulation, and discuss some ideas on the use of surge voltages as a quality assurance test.

Keywords

AC machines; IEEE standards; coils; finite element analysis; insulation testing; machine insulation; machine testing; stators; surges; IEEE Standard 522; VPI stator coils; alternating-current machines; applied surge voltages; finite-element analysis; fully processed coils; ground insulation; motor industry; pre-impregnated vacuum-pressure-impregnated coils; quality assurance test; stator core; surge testing; surge testing effect; turn insulation; turn-to-turn insulation testing; unimpregnated ground insulation; Coils; Finite element methods; Impulse testing; Insulation testing; Manufacturing; Petroleum; Stators; Surges; Voltage; Wounds;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2002.802943

Filename

1035202