Patent ID: 8578602

Claim:
A method of connecting two high voltage direct current cables in a cable joint, wherein each high voltage direct current cable comprises, from an inside portion to an outside portion in a radial direction, a central electrode, a circumferential cable insulation layer, and an outer electrode layer, the method comprising the steps of: a. connecting the central electrode of the two cables; b. forming at least one circumferential and contiguous layer of field grading material connecting the outer electrode layer with the central electrode and contiguously covering the cable insulation layer of a respective cable; c. forming a circumferential joint insulation layer around the layer of field grading material; and d. providing a circumferential joint outer electrode layer connecting the cable outer electrode layers of the two cables, wherein a section of the cable insulation layer which is covered by the layer of field grading material in step b is shaped as a cone converging towards a respective terminal end of the respective cable, wherein an angle between an axial direction with respect to an axis of the conductor and a plane of the shaped cone is in a range of 5-45°.