| 摘要 |
Cable end section comprises end-parts of N electrical phases/neutral, and a thermally-insulation envelope comprising cooling fluid. The end-parts each comprises a conductor and are arranged with phase 1 innermost, N outermost surrounded by the neutral, electrical insulation being between phases and N and neutral. The end-parts comprise contacting surfaces located sequentially along the longitudinal extension of the end-section. A termination unit has an insulating envelope connected to a cryostat, special parts at both ends comprising an adapter piece at the cable interface and a closing end-piece terminating the envelope in the end-section. The special parts houses an inlet and/or outlet for cooling fluid. The space between an inner wall of the envelope and a central opening of the cable is filled with cooling fluid. The special part at the end connecting to the cryostat houses an inlet or outlet, splitting cooling flow into cable annular flow and termination annular flow. |
| 主权项 |
1. A termination unit comprising an end-section of a cable, the end section of the cable defining a central longitudinal axis and comprising:
end-parts of N electrical phases, and an end-part of a neutral conductor the end-parts of the N electrical phases and the end-part of the neutral conductor each comprising at least one electrical conductor and being arranged in the cable concentrically around a core former with a phase 1 located relatively innermost, and phase N relatively outermost in the cable, phase N being surrounded by the neutral conductor, electrical insulation being arranged between neighbouring electrical phases and between phase N and the neutral conductor, and wherein the end-parts of the neutral conductor and the electrical phases each comprise a contacting surface to provide an electrical connection, the contacting surfaces being located sequentially along the longitudinal extension of the end-section of the cable, where the termination unit further comprises: a thermally insulating envelope connected to a cryostat, special parts at both ends of the termination unit comprising an adapter piece at the interface to the cable and a closing end-piece for terminating the thermally insulating envelope in the longitudinal direction of the end-section of the cable, the special parts at both ends housing at least one of an inlet and outlet for cooling fluid,
where the space defined by an inner wall of the thermally insulating envelope, as well as a central opening of the cable, i.e. inner volume of the former are filled with the cooling fluid, wherein the termination unit is configured to provide a counter flow configuration for the cable, and wherein the special part at the interface to the cable houses at least one of an inlet and an outlet configured to provide a cable annular flow of cooling fluid and a separate annular flow through said space defined by the inner wall of the thermally insulating envelope of the termination unit and filled with cooling fluid. |
