Abstract: A winding arrangement for a transformer includes a plurality of stabilising elements, a winding block, a top end press element and a bottom end press element. The top end press element is arranged on a top end of the winding block and the bottom end press element is arranged on a bottom end of the winding block. The plurality of stabilising elements are arranged to make the winding arrangement self-supporting and isolated from short circuit forces, wherein the at least one stabilising element comprises any one out of: at least one insulated tie-rod made of fibre glass or plastic, arranged between the top end press element and the bottom end press element and at least one insulated band arranged around the winding block, the top end press element and the bottom end press element.

Abstract: A method for manufacturing an electric winding of an electromagnetic induction apparatus includes providing a conductor structure and forming an electric winding by means of the conductor structure. The conductor structure includes a conductor element extending longitudinally along a main extension direction and one or more spacer bands arranged on corresponding lateral surfaces of the conductor element. Each spacer band includes a supporting structure made of electrically insulating material and spacer elements made of electrically insulating material arranged on the supporting structure. The spacer elements are spaced one from another along the supporting structure. The electric winding extends axially along a winding direction and has a plurality of turns arranged around the winding direction. Each turn of the electric winding is formed by a corresponding longitudinal portion of the conductor element.

Abstract: A method for manufacturing an electric winding of an electromagnetic induction apparatus includes providing a conductor structure including a conductor element extending longitudinally along a main extension direction and one or more spacer tapes of electrically insulating material around said conductor element along said main extension direction, each spacer tape having spacer portions at corresponding lateral surfaces of said conductor element and spaced one from another along the lateral surfaces. The method includes forming an electric winding extending axially along a winding direction and having a plurality of turns arranged around said winding direction where each turn is formed by a corresponding longitudinal portion of said conductor element.

Abstract: A method for manufacturing an electric winding of an electromagnetic induction apparatus includes providing a conductor structure and forming an electric winding by means of the conductor structure. The conductor structure includes a conductor element extending longitudinally along a main extension direction and one or more spacer bands arranged on corresponding lateral surfaces of the conductor element. Each spacer band includes a supporting structure made of electrically insulating material and spacer elements made of electrically insulating material arranged on the supporting structure. The spacer elements are spaced one from another along the supporting structure. The electric winding extends axially along a winding direction and has a plurality of turns arranged around the winding direction. Each turn of the electric winding is formed by a corresponding longitudinal portion of the conductor element.

Abstract: The present invention relates to an electrical transformer comprising an electrical insulator and a winding of an electrical conductor around a core, said insulator being formed of an essentially non-porous composite material comprising a resin matrix and up to 85% by weight of insulating fibres surrounded by the resin matrix, the composite material having a maximum moisture content of less than 0.5% by weight at 23° C. and 50% relative humidity.

Abstract: An electrical transformer includes a coil pack including windings, and spacers axially spacing turns of the windings from one another and being formed of a thermoplastic material. Sticks couple and position the spacers. The coil pack has high resistivity to creep and permits temperature rise without degradation of transformer insulation, providing for extended service life and unique methods of transformer system upgrade.

Abstract: The present invention relates to an electrical transformer comprising an electrical insulator and a winding of an electrical conductor around a core, said insulator being formed of an essentially non-porous composite material comprising a resin matrix and up to 85% by weight of insulating fibres surrounded by the resin matrix, the composite material having a maximum moisture content of less than 0.5% by weight at 23° C. and 50% relative humidity.