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

• Current Assignee: Alexandr I. Nikolsky, Gennady A. Bezchastnov, Jury F. Telezhnikov, Konstantin F. Potekhin, Konstantin N. Maslennikov, Lev A. Zolotov, Pavel S. Kabanov, Pavel Z. Nikitin, Tibor M. Nemeni, Veniamin S. Turutin, Yanush B. Danilevich
• Original Assignee: Alexandr I. Nikolsky, Gennady A. Bezchastnov, Jury F. Telezhnikov, Konstantin F. Potekhin, Konstantin N. Maslennikov, Lev A. Zolotov, Pavel S. Kabanov, Pavel Z. Nikitin, Tibor M. Nemeni, Veniamin S. Turutin, Yanush B. Danilevich
• Inventors: Nikitin, Pavel Z., Nemeni, Tibor M., Zolotov, Lev A., Bezchastnov, Gennady A., Nikolsky, Alexandr I., Telezhnikov, Jury F., Potekhin, Konstantin F., Maslennikov, Konstantin N., Kabanov, Pavel S., Danilevich, Yanush B., Turutin, Veniamin S.
• Primary Examiner(s): Gonzales, John
• Assistant Examiner(s): NIMMO, MORRIS
• Application Number:
  US06/414,326
• Time in Patent Office: 798 Days
• Field of Search: 174/15 C, 174/88 C
• US Class Current: 174/15.6
• CPC Class Codes: H02G 15/24 Cable junctions
• CPC Class Codes: H02K 2203/15 Machines characterised by cable windings, e.g. high-voltage cables, ribbon cables
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/40 for high voltage, e.g. affording protection against corona discharges
• CPC Class Codes: Y10S 174/22 Winding per se
• CPC Class Codes: Y10S 174/32 having means for cooling

Abstract

A coupling unit for two multilayer cables of a stator winding of a high-voltage generator, located in the end-face portion thereof, comprises terminations (1) of interconnected multilayer cables, wherein conducting layers (2,10) and conducting layer tubes (6,8) are concentrically arranged and separated from one another by insulating layers (7, 9, 14, 15), jumpers (18, 20, 22, 24) electrically coupling said conducting layers (2, 10) and conducting layer tubes (6, 8). A portion of each insulating layer (7, 9, 14, 15), facing the jumpers (18, 20, 22, 24) has a shape of an end insulation frustum (16). Each jumper (18, 20, 22, 24) is a totality of components made as a portion of a hollow cylinder limited by two planes. Each jumper (18, 20, 22, 24) carries an insulating bushing (12, 21, 23, 25). Thin-walled insulation cylinders (27, 28) are secured in each end insulation frustums (26) and in frustums (26) of the insulation bushings (19, 21, 23, 25). The surfaces of the frustum (26 ) of the insulating bushing (19, 21, 23, 25), the end insulation frustum (16), two adjacent jumpers (18, 20, 22, 24) and conducting layers (2, 10) coupled thereto and conducting layer tubes (6, 8) form an insulation chamber (30). The surface of the jumper (24), the tube (12) of the exterior conducting layer (10) connected to said jumper (24), the end insulation frustum (16), the frustum (26) of the insulating bushing (25), the thin-walled cylinders (27, 28) form an insulation cavity (31). The insulation chambers (30) communicate with one another and with the cooling ducts (5, 13) and with the insulation cavity (31).

Claims

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 and

cooling 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.