Abb Ab

Abb Inc.

Bo Hernnäs

Mats Leijon

Lars Gertmar

Peter Templin

Bengt Rydholm

Peter Carstensen

Bertil Larsson

Claes Ivarson

Bertil Berggren

Goran Holmstrom

Gunnar Kylander

Jan-Anders Nygren

Bengt Rothman

Sören Berggren

Erland Sörensen

Alberti Backlund

Mons Hölleland

Leif Johansson

Hans-Olof Kalldin

Bengt Goran

Gunnar Davidsson

A rotating electrical machine and method for making the machine, where the machine includes a high-voltage stator winding and elongated support devices for supporting the winding. The machine and method employ an arrangement of cable that is made of inner conductive strands, covered with a first semiconducting layer, which is covered with an insulating layer, which is covered with a second semiconducting layer. The cable is wound in slots in the stator such that separate cable lead-throughs are positioned in specific arrangements with respect to each other and in slots of the stator. The arrangement of the cable in the stator protects the integrity of the respective components in the cable and particularly the second semiconducting layer.

Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same

The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable () comprising one or more current-carrying conductors () with a number of strands () surrounded by at least one outer and one inner semiconducting layer () and intermediate insulating layers (). The outer semiconducting layer () is at earth potential. The stator winding may be produced with full or fractional slot winding, the phases of the winding being Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter. The invention also relates to a hydro-generator plant, a generator included in the plant and a procedure for building such a plant.

Hydro-generator plant

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Västerås, Sweden

Bo Hernnäs