Oil-impregnated polypropylene capacitor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYasuo Iijima, Tokihiko Shimizu
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Abstract
An oil-impregnated capacitor comprising a thin insulator sheet solely consisting of a plastic film and impregnated with an insulating oil, the aptitude of which is defined by both the oil absorption and the expansion coefficient of the film.
Claims2
An oil-impregnated capacitor comprising at least a pair of electrodes, at least one thin insulator sheet solely consisting of a polypropylene plastic film wound between said electrodes and impregnated with an insulating oil, said oil consisting essentially of an insulating oil having a physical property which allows the impregnated film to expand at 80.degree. C by an amount no greater than 0.5 per cent over the unimpregnated film at room temperature and a physical property which allows said insulating oil to be present in the film at 80.degree. C in an amount no greater than 10 per cent by weight of the film.
Dependencies are inferred from the claim text.