FLEXIBLE JOINT WITH RESISTIVE FIELD GRADING MATERIAL FOR HVDC CABLES AND METHOD FOR CONNECTING SAME TO HVDC CABLES
First Claim
1. 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. providing 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 the corresponding cable;
c. providing 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.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of connecting two high voltage DC cables in a flexible cable joint. Each high voltage DC cable can include, from the inside to the outside, a central conductor, an adjacent circumferential cable inner semicon layer, an adjacent circumferential cable insulation layer, and an adjacent circumferential cable outer semicon layer. The method includes: connecting the conductors of the two cables in a cable joint; providing adjacent to the conductors a circumferential joint inner semicon layer connecting the cable inner semicon layers of the two cables; providing at least one circumferential and contiguous layer of field grading material connecting the cable outer semicon layer with the joint inner semicon layer and covering the cable insulation layer of the corresponding cable; providing a circumferential joint insulation layer around the layer of field grading material, and where appropriate around the joint inner semicon layer; and providing a circumferential joint outer semicon layer connecting the cable outer semicon layers of the two cables.
-
Citations
33 Claims
-
1. 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. providing 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 the corresponding cable; c. providing 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
Specification