| 摘要 |
<p>An umbilical cable, particularly adequate for subsea exploration, contains two or more three-phase power supply circuits, each consisting of three conductors grouped in a trefoil configuration, each conductor including a metal core surrounded by an insulating sheath, each conductor being provided with an individual shielding whose cross-section is less than, equal to or greater than that of the core. Advantageously, each insulating sheath may be surrounded by a layer of semiconductor material. Filler spacers made of an insulating material, preferably polyethylene, may be used to aid in the positioning of the trefoils. The cable provides an economy of material, an increased flexibility, a reduction of the diameter of the finished cable and a substantial decrease of manufacturing time as compared with cables produced in accordance with the known art. A manufacturing method for an umbilical cable is also disclosed.</p> |
