A new mica-free turn insulation for rotating HV machines

Author

Björklund, A. ; Brammer, R. ; Rudolfsson, D. ; Paloniemi, P. ; Seppas, J. ; Svensson, G.

Author_Institution

HV Insulation, ABB Corp. Res., Vasteras, Sweden

fYear

1994

fDate

5-8 Jun 1994

Firstpage

482

Lastpage

484

Abstract

A new mica-free turn insulation for rotating HV machines has been developed. The insulation consists of a high temperature resistant wire-enamel coated with a chromium oxide-binder layer. The chromium oxide acts as a PD resistant coating protecting the wire enamel from degradation. By accelerated aging tests it is shown that the chromium oxide coating is well as good as the normally used mica. The main advantages of the new insulation are the possibilities of a rapid production process and its space saving performance

Keywords

ageing; ceramic insulation; insulated wires; insulating coatings; insulating thin films; insulation testing; life testing; machine insulation; partial discharges; Cr₂O₃; accelerated aging tests; chromium oxide-binder layer; degradation protection; high temperature resistant wire-enamel; mica-free turn insulation; partial discharge resistant coating; rotating HV machines; Accelerated aging; Cable insulation; Chromium; Coatings; Degradation; Production; Protection; Temperature; Testing; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on

Conference_Location

Pittsburgh, PA

ISSN

1089-084X

Print_ISBN

0-7803-1942-7

Type

conf

DOI

10.1109/ELINSL.1994.401414

Filename

401414