Patent ID: 6259030
Filing Date: 2001-07-10
Classification: H01B

Abstract:
An electrical cable for high-voltage circuits, said electrical cable adapted for use in fixed type apparatuses, said electrical cable comprising:a reinforcing fibrous thread;a tubular core portion having a diameter of about 1.3 mm for winding a wire therearound, said core portion comprising fluorine rubber and a ferrite powder mixed therewith, said ferrite powder comprising at least about 40% and less than about 85% by weight of said core portion;wherein the fluorine rubber is mixed with a reinforcing polymer compatible with the fluorine rubber, which is blended with a copolymer of ethylene and vinyl acetate;an electrically conductive wire, wound around said core portion so as to form a predetermined number of spirals therearound;wherein said electrically conductive wire has a diameter of not more than about 40 micrometers and said number of spirals being at least about 10,000 spirals/m; andwherein said electrically conductive wire is wound around said core portion while penetrating partially into said core;an insulating layer covering said conductive wire and said core portion, comprising two sublayers, the two sublayers comprising;an inner layer of a flexible crosslinked polyethylene coating having a melting point of at least 120 degrees C. and containing no flame retarders;an outer layer of a non-flammable material extruded over said crosslinked polyethylene;a polyvinyl chloride (PVC) sheath around said insulating layer; andwherein said electrical cable has an impedance of about 30 to 35 kohms.