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Coupling unit of two multilayer cables of high-voltage generator stator winding

  • US 4,477,690 A
  • Filed: 08/10/1982
  • Issued: 10/16/1984
  • Est. Priority Date: 12/18/1980
  • Status: Expired due to Fees
First Claim
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1. A coupling unit of two multilayer, high-voltage cables, said coupling unit comprising:

  • cable ends of two multilayer cables which have concentrically arranged conducting layers made as tubes separated by insulating layers,jumpers electrically connecting corresponding conducting layers of the multilayer cables, each insulating layer adjacent to the jumpers having an outer, axial face in the shape of a frustum, each said jumper defined by a plurality of individual elements forming a part of a hollow cylinder limited axially by two planes, each said jumper connecting respective conducting layers of the cable ends and arranged with respect to one another so that each jumper is a cylindrical surface having circumferentially spaced slots between adjacent elements and running parallel to the jumper axis, the elements of respective jumpers connecting each conducting layer tube being displaced circumferentially with respect to the jumpers connecting the innermost conducting layer so that the circumferentially spaced slots of the jumpers outwardly of said innermost conducting layer are located radially opposite the jumper elements of the adjacent jumper, each said jumper carrying an annular insulating bushing said bushings positioned symmetrically relative to the transverse plane dividing said jumper into two equal parts and extending axially relative to the cables,thin-walled insulating cylinders secured in said bushings and arranged concentrically with the jumpers, and similar thin-walled cylinders secured in and extending from each insulating layer of the cable ends,the opposite ends of the insulating bushings and the outer ends of the insulating layers, as well as the surfaces of two adjacent jumpers, the inner conducting layer, the conducting layer tubes, and the conducting layer coupled thereto, between which said insulating bushings are situated, form insulation chambers containing the thin-walled insulating cylinders, adjacent insulating cylinders having ends in overlapped relationship, whereas the surface of the outermost jumper and the tube of the external conducting layer coupled thereto at the surface of the cable end and the ends of the insulation bushings, as well as the surfaces of the thin-walled insulating cylinders, form an insulation cavity, the number of insulating cavities of each cable end being less by one than the number of insulating layers, and the insulation cavities of each cable end communicating with one another andcooling ducts in each cable formed by two adjacent, spaced concentric tubes electrically connected to one another and forming one conducting layer, corresponding cooling ducts of each cable communicating with each other.

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