Electricity: conductors and insulators – With fluids or vacuum – Conduits – cables and conductors
Patent
1988-05-20
1989-08-22
Nimmo, Morris H.
Electricity: conductors and insulators
With fluids or vacuum
Conduits, cables and conductors
174 25C, 174120FP, 428377, H01B 906
Patent
active
048598046
ABSTRACT:
An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
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Sakurai, T. et al., 275Kv Self-Contained Oil-filled Cable Insulated with Polymethylpentene Laminated Paper, IEEE Transactions on Power Apparatus and Systems, vol. PAS-100, No. 5, (May 1981) pp. 2575-2583.
Hagiuda Yasuhiro
Hata Ryosuke
Hirose Masayuki
Kuwabara Hidemitsu
Mizumoto Yasuharu
Nimmo Morris H.
Sumitomo Electric Industries
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