Next generation insulation for high operating stress

Author

Emery, F.T. ; Smith, J.D.B.

Author_Institution

Siemens Westinghouse Power Corp., Fort Payne, AL, USA

fYear

2001

fDate

2001

Firstpage

209

Lastpage

212

Abstract

The accurate control of the combination of mica paper, appropriate resin, and accelerator are important contributors to the overall mechanical and electrical properties of the high voltage coil groundwall insulated with mica paper tapes and impregnated with a high temperature epoxy resin. This paper presents the results of the dielectric performance when using special designed mica tapes for vacuum-pressure-impregnated (VPI) groundwall insulation. The objectives are to develop a glass backed mica tape with higher dielectric properties than commercially available tapes. Custom tapes were developed; working with a number of tape manufacturers. These tapes were used to make up insulated test bars and the best performing tape was applied to full size coils. This paper reports the final results of this investigation to develop the next generation stator groundwall system

Keywords

impregnated insulation; insulation testing; machine insulation; mica; paper; stators; accelerator; dielectric performance; electrical properties; glass backed mica tape; high temperature epoxy resin; high voltage coil groundwall insulation; impregnated mica paper tapes; insulated test bars; mechanical properties; mica paper; resin; stators; vacuum-pressure-impregnated groundwall insulation; Coils; Dielectrics and electrical insulation; Epoxy resins; Glass; Manufacturing; Mechanical factors; Stress; Temperature control; Testing; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Conference, 2001. Proceedings

Conference_Location

Cincinnati, OH

ISSN

0362-2479

Print_ISBN

0-7803-7180-1

Type

conf

DOI

10.1109/EEIC.2001.965612

Filename

965612