Abb Technology Ag

Nkt Hv Cables Ab

Nkt Hv Cables Gmbh

Abb Hv Cables (switzerland) Gmbh

Abb Schweiz Ag

Jörn Antonischki

Kristian Gustafsson

Dariusz Bednarowski

Nikolaus Zant

Marc Jeroense

Kenneth Johannesson

Lei Xie

Emmanuel Logakis

Julita Krol

A pressurisation and heating device for restoring an insulation system of a power cable, the pressurisation and heating device including: a first part including a first channel configured to receive a portion of the power cable, a second part including a second channel configured to receive a portion of the power cable, wherein the pressurisation and heating device is configured to be set in a closed state in which the first channel faces the second channel thereby forming a heating chamber extending from a first end to a second end, opposite the first end, of the pressurisation and heating device, wherein the pressurisation and heating device is configured to be pressurised to obtain a pressure higher than atmospheric pressure inside the heating chamber when the power cable is arranged sealed in the heating chamber, wherein the pressurisation and heating device has an at least 20 cm long axially extending section which is primarily made of material at most having a conductivity of the order of 1000 S/m at 20° C.

Pressurization and heating device and method for insulation system restoration of a power cable

A method of building an insulation system around a naked conductor section of a power cable. The insulation system includes an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer. The method includes: a) placing the naked conductor section in a mold, and b) molding an insulation system around the naked conductor section, wherein the molding of the insulation system involves injecting a first semiconducting compound into a first mold cavity to form an inner semiconducting layer around the naked conductor section, injecting an insulation compound into a second mold cavity to form an insulation layer around the inner semiconducting layer, and injecting a second semiconducting compound into a third mold cavity to form an outer semiconducting layer around the insulation layer.

Method of building an insulation system around a naked conductor section of a power cable

A method for heat treatment of an electric power cable, the electric power cable including a polymer-based electrical insulation system with a polymer composition. The method steps include placing the electric power cable having the polymer-based electrical insulation system into a heating chamber and exposing the polymer-based electrical insulation system to a heat treatment procedure when the electric power cable is located in the heating chamber. The step of placing the electric power cable into the heating chamber includes winding the electric power cable about a substantially vertical center axis to form a substantially horizontal first layer of a plurality of substantially horizontal turns of the electric power cable, winding the electric power cable about the center axis to form a plurality of substantially horizontal second layers, each second layer being formed by a plurality of substantially horizontal turns of the electric power cable and stacking the plurality of horizontal second layers above the first layer. An apparatus is provided for performing the method.

Method for heat treatment of an electric power cable

A device for machining an electrical cable having a cylindrical part and a conical part adjoining the cylindrical part. The device includes a fixture arranged to receive the cable and to hold the cable in a fixed position, the fixture defines an elongated space for accommodating the cable, a tool for removing material from the cable including at least one cutter, and rotational guiding means for guiding a first rotation of the cutter about a longitudinal axis of the space. The cutter is elongated and the longitudinal axis of the cutter is arranged inclined with respect to the longitudinal axis of the space so that the angle between the longitudinal axes of the cutter and the space is between 10 and 80 degrees. The device further includes drive means for providing a second rotation of the cutter about a rotational axis through the tool in order to cause the machining.

Device and method for machining an electrical cable

Growing community of inventors

Fågelmara, Sweden

Jörn Antonischki