Electricity: conductors and insulators – With fluids or vacuum – Conduits – cables and conductors
Patent
1985-06-26
1987-06-23
Grimley, Arthur T.
Electricity: conductors and insulators
With fluids or vacuum
Conduits, cables and conductors
174120FP, H01B 906
Patent
active
046754709
ABSTRACT:
An oil-immersion electrically insulated cable of high performance is constructed by wrapping a conductor with insulation formed by winding on the conductor polypropylene film having a density in the range of 0.905 to 0.915 g/cm.sup.3, a birefringence in the range of 0.020 to 0.035, a ratio of strengths in two axial directions (tensile strength in the longitudinal direction/tensile strength in the lateral direction) in the range of 5 to 15, and impregnating the insulating layer with an insulating oil, preferably DDB oil.
REFERENCES:
patent: 3450968 (1969-06-01), Cox
patent: 3484664 (1969-12-01), Liddicoat
patent: 3775549 (1973-11-01), Matsuda et al.
patent: 3844860 (1974-10-01), Edwards
patent: 4237334 (1980-12-01), Kojima et al.
patent: 4571357 (1986-02-01), Hata
patent: 4602121 (1986-07-01), Priaroggia
Cheng, F. S. et al.; Effect of Impregnant on the Electrical and Mechanical Properties of Polypropylene Paper; Wire and Wire Products; May 1972; pp. 57-63.
Hata Ryosuke
Hirose Masayuki
Horiuchi Satoshi
Tsunashima Kenji
Yamanouchi Shosuke
Grimley Arthur T.
Nimmo Morris H.
Sumitomo Electric Industries
Toray Industries Inc.
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