An electrical device containing an enzymatically-degummed vegetable oil is disclosed. Also disclosed are methods for insulating and cooling a transformer using enzymatically-degummed vegetable oils, and methods for adding an enzymatically-degummed vegetable oil to an enclosure of an electrical device. Further disclosed are processes for making dielectric fluids using enzyme-degumming of vegetable oils or using enzyme-degummed vegetable oils as the starting material for the process.

An electrical device containing an enzymatically-degummed vegetable oil is disclosed. Also disclosed are methods for insulating and cooling a transformer using enzymatically-degummed vegetable oils, and methods for adding an enzymatically-degummed vegetable oil to an enclosure of an electrical device. Further disclosed are processes for making dielectric fluids using enzyme-degumming of vegetable oils or using enzyme-degummed vegetable oils as the starting material for the process.

The invention relates to the use of a composition comprising a mixture of vegetable oil fatty acid esters as a dielectric fluid in an electrical apparatus.

The invention relates to the use of a composition comprising a mixture of vegetable oil fatty acid esters as a dielectric fluid in an electrical apparatus.

A technique facilitates construction and operation of a power cable which may be used to supply power to an electric submersible pumping system downhole into a wellbore. The power cable comprises at least one electrical conductor. Each electrical conductor is insulated with an insulation layer and protected from deleterious fluids by a fluid barrier layer. Further protection is provided by a protective layer disposed around the fluid barrier layer. The protective layer is foamed to provide a cushion layer and to further protect components of the power cable. An armor layer may be disposed around the protective layer.

A technique facilitates construction and operation of a power cable which may be used to supply power to an electric submersible pumping system downhole into a wellbore. The power cable comprises at least one electrical conductor. Each electrical conductor is insulated with an insulation layer and protected from deleterious fluids by a fluid barrier layer. Further protection is provided by a protective layer disposed around the fluid barrier layer. The protective layer is foamed to provide a cushion layer and to further protect components of the power cable. An armor layer may be disposed around the protective layer.

Coated conductors comprising a conductor and a peelable polymeric coating at least partially surrounding the conductor, where the peelable polymeric coating comprises from 1 to 8 microcapillaries which comprise a low-viscosity filler material. Also disclosed are methods for making such coated conductors.

Coated conductors comprising a conductor and a peelable polymeric coating at least partially surrounding the conductor, where the peelable polymeric coating comprises from 1 to 8 microcapillaries which comprise a low-viscosity filler material. Also disclosed are methods for making such coated conductors.

A power cable includes a conductor; an inner semi-conductive layer covering the conductor; an insulating layer covering the inner semi-conductive layer, the insulating layer being impregnated with an insulating oil; an outer semi-conductive layer covering the insulating layer; a metal sheath layer covering the outer semi-conductive layer; and a cable protection layer covering the metal sheath layer. The insulating layer is formed by cross-winding insulating paper and impregnating the insulating paper with the insulating oil. The inner semi-conductive layer and the outer semi-conductive layer are formed by cross-winding semi-conductive paper and impregnating the semi-conductive paper with the insulating oil. A thickness of the outer semi-conductive layer is 7.5 to 15% of a total thickness of the inner semi-conductive layer, the insulating layer, and the outer semi-conductive layer.

A power cable includes a conductor; an inner semi-conductive layer covering the conductor; an insulating layer covering the inner semi-conductive layer, the insulating layer being impregnated with an insulating oil; an outer semi-conductive layer covering the insulating layer; a metal sheath layer covering the outer semi-conductive layer; and a cable protection layer covering the metal sheath layer. The insulating layer is formed by cross-winding insulating paper and impregnating the insulating paper with the insulating oil. The inner semi-conductive layer and the outer semi-conductive layer are formed by cross-winding semi-conductive paper and impregnating the semi-conductive paper with the insulating oil. A thickness of the outer semi-conductive layer is 7.5 to 15% of a total thickness of the inner semi-conductive layer, the insulating layer, and the outer semi-conductive layer.