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

fYear

1991

fDate

8-12 Jul 1991

Firstpage

317

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICPADM.1991.172062

Filename

172062