A LIQUID NITROGEN COOLED PANCAKE WOUND CORE AND CAST RESIN TYPE TRANSFORMER USING SAID CORE, THEREOF

摘要

A liquid nitrogen cooled pancake wound core, said core comprising: core winding assembly comprising a plurality of annular rim shaped foil layers, each pair of adjacent foil layers being interspersed with an annular rim shaped insulation layer, said inner layer rim being spaced apart from said outer layer rim by interlayer ducts; and cooling tubes inserted between said interlayer ducts. A cast resin transformer comprising liquid nitrogen cooled pancake wound core, is also provided.