| 摘要 |
An all film capacitor includes a sheet of plastic material in film form wound with the capacitor electrode foil, the film being capable of impregnation by a dielectric liquid medium and having been wetted by the dielectric liquid prior to impregnation. The plastic film and dielectric liquid form the dielectric system of the capacitor. In processing, a dielectric liquid medium is applied to the film to provide a wet film and the wet film is wound with the foil into a capacitor pack. The pack, or packs, are subjected to an elevated temperature and vacuum to draw off volatile material such as water vapor, i.e., the pack is dried. Subsequent to drying, the pack, or packs, are positioned in a capacitor tank for soaking in the dielectric liquid, again at an elevated temperature and under a vacuum. Complete impregnation of the film by the liquid dielectric occurs during soaking. If desired, the same film material can be wound on the outside of the capacitor packs to insulate the packs from the capacitor tank.
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