MULTILAYERED ELECTRIC INSULATED WIRE AND TRANSFORMER USING THE SAME

摘要

This invention provides a multilayered electric insulated wire comprising a conductor and three or more extruded insulation layers covering the conductor. In the insulation layers, the outermost layer (A) in the insulation layer is formed of an extruded covering layer of such a resin that the elongation of the resin immersed for 2 sec in a solder tank of 150°C is at least equal to that before the heat treatment and is not less than 290%. The innermost layer (B) is formed of such a resin that the elongation of the resin immersed for 2 sec in a solder tank of 150°C is at least equal to that before the heat treatment and is not less than 290%. The insulation layer (C) between the outermost layer and the innermost layer is formed of an extruded covering layer of a crystalline resin having a melting point of 280°C or above or a noncrystalline resin having a glass transition temperature of 200°C or above. There is also provided a transformer comprising the multilayered electric insulated wire.