| abstract |
There is disclosed a multilayer insulated wirenhaving two or more extrusion-coating insulating layersnprovided on a conductor directly or via some other layer,nor provided on the outside of a multicore wire composed ofnconductor cores or insulated cores that are collectedntogether, wherein at least one of the insulating layers isnmade of a mixture prepared by mixing 100 parts by weightnof a polyethersulfone resin and 10 to 100 parts by weightnof an inorganic filler. There is also disclosed antransformer utilizing the multilayer insulted wire. Thenmultilayer insulated wire can realize such high heatnresistance as heat resistance F class (155 °C), whichnsatisfies IEC 950 standards, or higher heat resistance, inntransformers; and can exhibit excellent electricalnproperties even at high frequencies. Further, accordingnto the transformer, when it is used at high frequencies,nthe electric properties are not lowered, and influence bynthe generation of heat can be prevented. |