By Topic

Development of non-filled EPR insulation system for power lead of 66 kV-class superconducting fault current limiter

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

8 Author(s)
Sakai, M. ; Toshiba Corp., Yokohama, Japan ; Fukuda, A. ; Moriyama, H. ; Shimada, M.
more authors

Development of ethylene-propylene rubber (EPR) insulation system has been advanced for a compact power lead of 66 kV-class high temperature superconducting fault current limiter (SCFCL). It is well known that insulation layers of superconducting cables are molded by extruding EPR containing inorganic filler. The power leads are not as long as the superconducting cables, making it difficult to mold their insulation layers by extrusion. When molding EPR by heat treatment, voids tend to remain in the insulation layer because of the low viscosity of filler-containing EPR. Partial discharge will occur and insulation deteriorates if voids exist in the insulation layer. Fluidity of EPR without filler (non-filled) was experimentally investigated to be used for insulating power leads. It was found that the viscosity of non-filled EPR is sufficiently low. It was also found that non-filled EPR has excellent crack resistance. An insulation model was easily constructed with simple dies. No voids were found in the insulation layer of this model, and no cracks occurred by thermal cycling between 333 K and 77 K. Consequently, it was confirmed that non-filled EPR is a suitable material for insulating power leads.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:10 ,  Issue: 1 )