Title :
Dielectric Characteristics of EPR for 66 kV-Class Power Leads of High-Tc Superconducting Fault Current Limiter
Author :
Sakai, Masahiro ; Kaneiwa, Hiroshi ; Koyama, Hishoshi ; Yazawa, Takashi ; Urata, Masami ; Tokunaga, Yoshitaka ; Inoue, Kuniaki
Author_Institution :
Toshiba Corp., Kanagawa
fDate :
6/1/2006 12:00:00 AM
Abstract :
A 66 kV-class power lead insulation system has been developed for high-Tc superconducting fault current limiters (SCFCL). The power leads are insulated with ethylene-propylene rubber without organic filler, and have excellent crack resistance. This system was evaluated by an insulation model and was shown to have strong enough electrical insulation properties for 66 kV-class equipment. To minimize insulation layer thickness, the dielectric characteristics of this EPR were investigated in detail. The specimens were made 0.3-10 mm thick: near the thickness of an actual power lead insulation layer. The breakdown stress was measured at room temperature and at liquid nitrogen temperature. The V-t characteristic was also measured. Based on the study, the power lead insulation model was constructed and its electrical insulation properties were evaluated
Keywords :
cracks; dielectric measurement; electric breakdown; ethylene-propylene rubber; fault current limiters; high-temperature superconductors; power cable insulation; superconducting cables; superconducting devices; 0.3 to 10 mm; 66 kV; EPR; V-t characteristic; breakdown stress measurement; crack resistance; dielectric breakdown; electrical insulation properties; ethylene-propylene rubber; high-Tc superconducting fault current limiter; liquid nitrogen temperature; power lead insulation system; room temperature; Dielectric measurements; Dielectrics and electrical insulation; Electric breakdown; Electric resistance; Fault current limiters; Paramagnetic resonance; Power system modeling; Rubber; Superconducting epitaxial layers; Temperature measurement; Dielectric breakdown; V-t characteristic; ethylene-propylene rubber; high-Tc superconducting; power lead insulation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2006.873247
