A NEW INSULATION SCHEME OF TURBO GENERATOR STATOR WINDING ROEBEL BAR FOR AVOIDING INTER TURN SHORTS

摘要

Roebel bar conductors having plaited and thermally cured at 155 to 165°C copper strips (10), such strips being doubly covered with glass insulation in two halves, thermoset epoxy glass fleece sheet (11) as half insulation, polyester mica tape (12) as half insulation extension, polyamide fleece sheet (15) as transposition insulation, FOM mica tape putty (13) as transposition surface filler, resin poor mica tape (16) as main ground wall insulation, conductive graphite paper tape (17) as protection for outer corona; characterized in that multilayer insulation is provided consisting of polyamide - polyester - polyamide (14) as transposition reinforcement to this insulation having higher tearing strength due to presence of sandwitched polyester layer.