Title :
Evaluation of ethylene propylene rubber as an electrical insulation material of superconducting cable
Author :
Mizuno, Yukio ; Ohe, Toshio ; Nomizu, Keizoh ; Muneyasu, Hideo ; Nagao, Masayuki ; Kosaki, Masamitsu ; Shimizu, Noriyuki ; Horii, Kenji
Author_Institution :
Dept. of Electr. & Electron. Eng., Toyohashi Univ. of Technol., Japan
Abstract :
The mechanical and electrical properties of ethylene propylene rubber (EPR) pieces were made in comparison with polyethylene (PE) in the cryogenic temperature region to examine the possibility for use in solid electrical insulation material of superconducting cables. The mechanical properties of EPR are preferable to those of PE because of its low shrinkage. The electric strength and dielectric loss tangent of EPR are comparable to those of PE at liquid helium temperature. Based on these encouraging results, an extruded EPR-insulated cable was fabricated and its 15 m length was cooled down to liquid helium temperature successfully. A partial discharge experiment at the temperature showed good electrical characteristics
Keywords :
cable insulation; dielectric losses; electric strength; organic insulating materials; rubber; superconducting cables; EPR; cryogenic temperature region; dielectric loss tangent; electric strength; electrical insulation material; electrical properties; ethylene propylene rubber; liquid helium temperature; mechanical properties; partial discharge; shrinkage; solid electrical insulation; superconducting cable; Cryogenics; Dielectric losses; Dielectrics and electrical insulation; Helium; Mechanical factors; Paramagnetic resonance; Polyethylene; Rubber; Superconducting cables; Temperature;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172062
