... level:220C 4)Great heat resisting Polyimide enamel copper flat wire is made by flat copper conductor (TBR, TBY1, TBY2), ... and is an ideal material to produce winding for dry transformer, oil-immersed transformer, generator, motor, reactor, and the other electric appliances ... >100 timeselongation rate of semi-hard wire>25%elongation rate of soft state wire>34%Thermal Index220°CYielding strength of ...