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US 8,772,639 B2Granted
Maintenance of electric cables by self-repairing
AssigneeElectricite de France
InventorsYves Bertrand, Céline Martin, Gérard Mortha
Life of this patent
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Abstract
A method is provided for maintaining an electric cable, said electric cable comprising at least one electric conductor surrounded by an outer sheath, said outer sheath containing an insulating oil distributed around said electric conductor, such as a fluid-oil cable or an oil-filled cable. A drying oil, selected so as to solidify upon contacting the air, is added to the oil of the cable for sealing off any accidental oil leak through an outer sheath of the electric cable.
Claims14
A method of maintenance of an electric cable, said cable comprising:
- at least one electric conductor;
- an outer sheath surrounding said electric conductor;
- an insulating oil contained in said outer sheath and distributed around said electric conductor,
- the method comprising the steps of:
- selecting a drying additive in order to solidify upon contacting the air, and
- adding a drying additive to the insulating cable oil, in a proportion chosen for sealing off any oil leak through the outer sheath.
3 more elements
A self-repairing electric cable device comprising:
- at least one electric conductor,
- an outer sheath arranged around said electric conductor, said outer sheath containing an insulating oil distributed around said electric conductor, a composition of the insulating cable oil comprising at least one drying additive, a proportion of the drying additive in the composition of the cable oil being chosen for sealing off a possible oil leak through the outer sheath.
Dependencies are inferred from the claim text.