US 2020/0013526 A1Published application

Power cable

AssigneeLs Cable & System Ltd.

InventorsJi Sung KIM, Weon Bae KIM, Kyoung Ro KO, Su Kil LEE, Joon Keun LEE, Soon Il SOHN, Kum Hwan CHA, Jae Cheol GWAG, Tae Hyun KIM

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Abstract

Provided is a power cable, particularly, an ultra-high voltage underground or submarine cable for long-distance direct-current transmission. More specifically, the present invention relates to a power cable, in which an insulating layer has high dielectric strength, an electric field applied to the insulating layer is effectively reduced, and particularly, a large void is suppressed from occurring in the insulating layer when the power cable is left at low temperatures for a long time until electric current is supplied thereto after installed in a low-temperature environment, thereby effectively preventing partial discharge, dielectric breakdown, etc. from occurring due to an electric field concentrated in the large void.

Claims17

Dependent claims

A power cable comprising:

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,
wherein 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, and
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.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/495,261Filed 30 Mar 2017
Priority: KR 10-2017-003744924 Mar 2017
Published: 9 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H01B 9/02
Power cables: with screens or conductive layers, e.g. for avoiding large potential gradients
H01B 9/027
With screens or conductive layers, e.g. for avoiding large potential gradients: composed of semi-conducting layers
H01B 3/20
Mainly consisting of organic substances: liquids, e.g. oils
H01B 3/30
Mainly consisting of organic substances: plastics; resins; waxes

Family

US 10,672,539 B2Related patent
US 2020/0013526 A1This patent

From the US filing history. Foreign family members aren’t listed.

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