Stainless steel screen and non-insulating jacket arrangement for power cables

Patent metadata

Field	Value
Publication number	US-10535448-B2
Application number	US-201715850685-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 21, 2017
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A cable including a conductor. An insulation system surrounds the conductor. A metallic screen surrounds the insulation system. A jacket surrounds the insulation system. The metallic screen is constructed of stainless steel.

First claim

What is claimed is:

1. A cable comprising:
a conductor;
an insulation system directly surrounding the conductor, wherein the insulation system is a three part insulation system that includes a semi-conductive polymer layer surrounded by an insulative polymer layer surrounded by a semi-conductive polymer layer;
a metallic screen directly surrounding, and in contact with, the insulation system; and
a conductive jacket surrounding the metallic screen,
wherein said metallic screen is constructed of non-corrugated stainless steel, and
wherein said conductive jacket includes sufficient carbon black density added to control sheath voltage by reducing the accumulation of induced sheath voltage, but simultaneously does not include sufficient carbon black density that would allow accumulation of circulating currents.

2. The cable as claimed in claim 1 , wherein the metallic screen is bonded to either one of an outside surface of the insulation system or an inside surface of said jacket.

3. The cable as claimed in claim 1 , wherein said metallic screen is less than 0.5 mm thick.

4. A cable comprising:
a conductor;
an insulation system directly surrounding the conductor, wherein the insulation system is a three part insulation system that includes a semi-conductive polymer layer surrounded by an insulative polymer layer surrounded by a semi-conductive polymer layer;
a stainless steel non-corrugated metallic screen directly surrounding, and in contact with, the insulation system; and
a conductive jacket surrounding the metallic screen,
wherein said jacket includes conductive particles, and
wherein said conductive jacket includes sufficient carbon black density added to control sheath voltage by reducing the accumulation of induced sheath voltage, but simultaneously does not include sufficient carbon black density that would allow accumulation of circulating currents.

5. The cable as claimed in claim 4 , wherein the metallic screen is bonded to either one of an outside surface of the insulation system or an inside surface of said jacket.

6. The cable as claimed in claim 4 , wherein said metallic screen is less than 0.5 mm thick.

Assignees

• Nexans

Inventors

• Henriksen Martin
• Dubois David

Classifications

• H01B9/02 Primary

  with screens or conductive layers, e.g. for avoiding large potential gradients · CPC title

• H01B7/22

  Metal wires or tapes, e.g. made of steel · CPC title

• H01B9/027 Primary

  composed of semi-conducting layers · CPC title

• H01B7/26

  Reduction of losses in sheaths or armouring · CPC title