Electrical insulating oil and oil-filled electrical appliances
AssigneeNippon Petrochemicals Company, Limited
InventorsAtsushi Sato, Keiji Endo, Shigenobu Kawakami, Hitoshi Yanagishita, Shozo Hayashi
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Abstract
An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil comprises (a) an electrical insulating oil except polyaromatic hydrocarbons and (b) an aromatic monoolefin and/or diolefin having two condensed or noncondensed aromatic nuclei.
Claims11
An electrical insulating oil consisting essentially of:
- (a) at least one electrical insulating oil selected from the group consisting of organic acid esters, animal oils, vegetable oils and aromatic ethers, and
- (b) 0.01 to 50% by weight of at least one of aromatic monoolefins and/or aromatic diolefins each having two condensed or noncondensed aromatic nuclei.
An oil-filled electrical appliance which is impregnated with an electrical insulating oil consisting essentially of:
- (a) at least one electrical insulating oil selected from the group consisting of organic acid esters, animal oils, vegetable oils, and aromatic ethers, and
- (b) 0.01 to 50% by weight of at least one of aromatic monoolefins and/or aromatic diolefins each having two condensed or noncondensed aromatic nuclei.
Dependencies are inferred from the claim text.