Cable, a method of constructing a cable, and use of a cable

US6750399B1 · kind B1 · utility

Assignee

• NKT CABLES ULTERA A/S

Inventor

• Manfred Däumling · Zweibrücken, DE

Key dates

• Filing date: May 16, 2002
• Grant date: Jun 15, 2004
• Expiry date: May 16, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E40/60
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A cable has three or more conducting layers which are mutually separated by isolating layers, resistive layers, or reduced electrical contact surfaces. The conducting layers include electrical conductors helically arranged with predetermined pitch lengths. The predetermined pitch lengths increase in steps from layer to layer from a radial innermost conducting layer to an intermediate conducting layer located between the radial innermost conducting layer and a radial outermost conducting layer, but the predefined pitch lengths remain substantially constant or decrease in steps from layer to layer from the intermediate conducting layer to the radial outermost conducting layer. As a result, an even current distribution and, thereby, a reduced AC loss is obtained.