POWER TRANSFORMER Russian patent published in 2002 - IPC

FIELD: electrical engineering. SUBSTANCE: power transformer 1 whose high-temperature semiconductor windings are provided with insulation for which corona discharge is not a problem has at least one current-carrying winding incorporating conducting means 13-15, cooling means for the latter to raise its electric conductivity, and insulating means 20-22 around conducting means; insulating means has internal semiconductor layer 20 contacting mentioned conducting means, external semiconductor layer 21 placed at variable potential across its length, and intermediate insulating layer 22 between mentioned layers 20 and 21. EFFECT: enhanced reliability of transformer winding insulation. 26 cl, 6 dwg, 1 tbl