Borealis Ag

Nkt Hv Cables Ab

Peter Sunnegårdh

Per-Ola Hagstrand

Villgot Englund

Ulf Nilsson

Annika Smedberg

Virginie Eriksson

Carl-Olof Olsson

Johan Andersson

Marc Jeroense

Anders Gustafsson

Niklas Thorn

Hossein Ghorbani

Birgitta Källstrand

Jonas Jungqvist

Emy Silfverberg

Pär Lilja

Jonny Brun

A transmission cable includes a conductor or a bundle of conductors extending along a longitudinal axis, which is circumferentially covered by an insulation layer having an extruded insulation material, whereby the transmission cable passes the electrical type test as specified in Cigr&#xe9; TB496, whereby the rated voltage Uis 450 kV or more. The type test includes subjecting the power cable to a DC voltage of 1.85*Uduring 10 to 15 cycles at negative polarity, followed by a polarity reversal with another 10 to 15 cycles at positive polarity at a DC voltage of 1.85*U, followed by additional 2 to 5 cycles during at least 4 to 10 days at positive polarity, and wherein Uis 450 kV, or 525 kV, or more.

Electrical HV transmission power cable

An electric power cable and a process for the production of the cable including a metal conductor and an electric insulation system surrounding the conductor coaxially and radially outwards of the conductor having improved electric properties. The insulation system includes an inner semi-conducting layer surrounded radially outwards by an insulation layer and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer. The electric power cable further includes an inner water blocking material arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material arranged radially outwards from the insulation system. An inner barrier layer is arranged as a diffusion hindering layer between the inner water blocking material and the insulation system and an outer barrier layer is arranged as a diffusion hindering layer between the insulation system and the outer water blocking material.

Electric power cable and a process for the production of the power cable

Growing community of inventors

Kallinge, Sweden

Peter Sunnegårdh