High voltage direct current cable with impregnated tape insulati

Details High voltage direct current cable with impregnated tape insulati High voltage direct current cable with impregnated tape insulati

1981-12-04

1983-11-22

Grimley, A. T.

Electricity: conductors and insulators

With fluids or vacuum

Conduits, cables and conductors

174 25C, 174102SC, H01B 714, H01B 902, H01B 906

Patent

active

044170939

ABSTRACT:
A direct current, electric, submarine cable which may be used in long lengths and at great depths and which has improved voltage breakdown characteristics with respect to voids which form in the insulation. The cable has a conductor surrounded by an inner semi-conductive screen which is surrounded by cellulose paper tape insulation which is surrounded by an outer semi-conductive screen which is surrounded by a metal sheath. The paper tape is impregnated with a compound comprising a viscous hydrocarbon oil containing a substance having polar groups, the amount of the substance being sufficient to make the volume resistivity of the compound 100 times lower than the volume resistivity of the tape with the compound therein.

REFERENCES:
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patent: 3948787 (1976-04-01), Munch
Constandinov, Dr. T. E., "The Electrical Resistivity of Insulating Papers", Insulations/Circuits, 6/1970, pp. 36-38.
Pohnan, Frank J., "Voids and Wax in Solid High-Voltage Cables", AIEE Transactions, vol. 70, Part II, 1951, pp. 1372-1375.

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