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: 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 electric transformer comprising: a magnetic core; at least one coil assembly which is positioned around a portion of the magnetic core and comprises a plurality of windings; a structure adapted for applying a clamping force on the magnetic core and/or the windings; and a cooling circuit adapted for conveying cooling fluid directly inside the coil assembly.

Abstract: An electric transformer comprising: a magnetic core; at least one coil assembly which is positioned around a portion of the magnetic core and comprises a plurality of windings; a structure adapted for applying a clamping force on the magnetic core and/or the windings; and a cooling circuit adapted for conveying cooling fluid directly inside the coil assembly.

Abstract: An electrical induction device for high voltage applications, of the type comprising a magnetic core which has at least one leg and is operatively coupled to a supporting structure, at least one inner winding which is arranged around said leg and has a first rated voltage, at least one outer winding which is arranged around said at least one inner winding and has a second rated voltage; and electrically insulating means, wherein said at least one inner winding comprises a plurality of substantially concentric turns formed by a sheet of electrically conducting material which is spirally wound, and in that said electrically insulating means comprise at least one layer of electrically insulating material which is arranged between mutually facing surfaces of said concentric turns, and first shaped insulating means which edge, at least partially, at least one of the upper and lower external rims of said inner winding.

Abstract: An electrical induction device for high voltage applications, of the type comprising a magnetic core which has at least one leg (1) and is operatively coupled to a supporting structure, at least one inner winding (10) which is arranged around said leg (1) and has a first rated voltage, at least one outer winding (20) which is arranged around said at least one inner winding (10) and has a second rated voltage; and electrically insulating means, characterized in that said at least one inner winding (10) comprises a plurality of substantially concentric turns (11) formed by a sheet of electrically conducting material which is spirally wound, and in that said electrically insulating means comprise at least one layer (12) of electrically insulating material which is arranged between mutually facing surfaces of said concentric turns (11), and first shaped insulating means (4, 5) which edge, at least partially, at least one of the upper and lower external rims (13,14) of said inner winding (10).