| 摘要 |
PURPOSE:To improve the dielectric strength of the entire winding for an induction electric apparatus by using the winding by dipping in an insulating oil, and using a material having a permittivity of the value of 1.3 times or less of that of the oil for insulating paper with which a conductor is covered, rails and spacers. CONSTITUTION:A material having a permittivity of the value of 1.3 times or less of that of an insulating foil is used for insulating paper 3a with which a conductor 3 is covered, rails and spacers 4. The material includes, for example, fluorine resin such as polytetrafluoroethylene, polymethyl benzene, polypropylene, polyethylene, etc. The paper 3a uses, for example, synthetic paper in which plastic film having low permittivity and kraft paper are laminated. Thus, an electric field applied to fine oil gap can be reduced to improve the dielectric strength of the entire winding.
|
