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ac treeing of ethylene‐propylene rubber in cryogenic temperature region
Author(s) -
Minoda Atsushi,
Mitsuyama Yasuichi,
Mizuno Yukio,
Nagao Masayuki,
Kosaki Masamitsu
Publication year - 1998
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(199808)124:3<1::aid-eej1>3.0.co;2-c
Subject(s) - electrical treeing , materials science , ethylene propylene rubber , composite material , electron paramagnetic resonance , liquid nitrogen , electrical resistivity and conductivity , electrical engineering , partial discharge , polymer , chemistry , voltage , nuclear magnetic resonance , physics , organic chemistry , copolymer , engineering
The authors have proved that ethylene‐propylene rubber (EPR) is suitable for the solid electrical insulating material of superconducting and cryoresistive cables due to its excellent mechanical and good electrical properties. It is imperative to study the treeing resistivity of EPR in view of long‐term reliability as a cable insulator. The objectives of this paper are to establish an ac treeing test method of opaque EPR samples with fillers and to examine the treeing resistivity of EPR at both liquid‐nitrogen and room temperatures and the effect of fillers on treeing resistivity. It was found that EPR has enough resistance to ac treeing at liquid‐nitrogen temperature and that fillers improve ac treeing resistivity slightly. High reliability of EPR insulation is expected during long‐term operation at cryogenic temperature. © 1998 Scripta Technica, Electr Eng Jpn, 124(3): 1–9, 1998