Title :
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
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;
Conference_Titel :
Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-1942-7
DOI :
10.1109/ELINSL.1994.401414
