Siemens Aktiengesellschaft

Transformatoren Union Aktiengesellschaft

Rudolf Dedelmahr

Friedrich Alber

Hans Schott

Siegfried Weiss

Wolfgang Bendel

Gerhard Altmann

Rudolf Link

Winfried Jungnitz

Richard Pfeiffer

Hermann Eyrich

Klaus Seeliger

Heinz Sesterheim

Siegfried Kromer

Coil for high-voltage transformer

Process for producing a cast resin coil

A clamping frame for a transformer core has a clamping frame part and a tensioner. The surfaces of the tensioner and of the clamping frame part abutting the transformer core lie in a common plane. The tensioner features an engagement part, which engages in a recess of the clamping frame part.

Integrated frame system

Method of manufacturing a transformer winding embedded in casting resin by winding coils respectively by themselves and independently of one another for disposition thereof in tandem in axial direction of the winding includes placing the wound coils in a substantially annular casting mold having an inner and an outer jacket, with respective impregnated corrugated mats of insulating material as spacers disposed between the inner jacket and the coils as well as between the coils and the outer jacket, the inner and the outer jackets being fixed between mold end walls at respective ends of the casting mold; and disposing the casting mold containing the wound coils in an evacuated chamber and pouring casting resin into the casting mold through an axially parallel slot formed in the outer jacket thereof. Additionally included are spreading the inner jacket in radial direction so as to permanently deform the inner spacer to a dimension at which the radial extent of the inner spacer is reduced, the inner jacket being formed with axially parallel edges at ends thereof overlapping in circumferential direction and slidable on one another during the deformation so as to spread the inner jacket in radial direction; fixing the coils of the winding on the inner spacer against movement in axial direction; and surrounding respective edges at the ends of the inner and the outer jackets with an elastic layer at the inner face of the respective mold end walls.

Method of manufacturing transformer windings embedded in casting resin

Multiphase transformer for power distribution in a supply network includes a single block of cast resin having high voltage and low voltage conductor windings embedded therein, and an iron core with a plurality of legs and an upper and lower yoke formed of closely-stacked transformer laminations centrally embedded in the block, the block having axially-extending ribs integral therewith defining troughs between the ribs and defining spaces between the ribs and the core, legs and yokes, watertight caps disposed between the ribs closing off the troughs and holding the core, legs and yokes, and mechanically compacted dry quartz sand filled in the space.

Multiphase transformer for power transmission in a supply system

Growing community of inventors

Aichtal, Germany

Rudolf Dedelmahr