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US 4,290,926 AGranted
Non-halogenated impregnant for capacitors comprising an aromatic carboxylic acid ester and an alkene
AssigneeGeneral Electric Company
InventorDavid G. Shaw
Life of this patent
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Abstract
An electrical capacitor is impregnated with a base impregnant of a non-halogenated aromatic liquid which absorbs gas in the range of 40.degree. to 100.degree. to which is added a material that is a greater gas absorber over the same temperature range.
Claims11
A composition for use as a dielectric liquid under stress in an electrical apparatus comprising
- a. a dielectric liquid aromatic carboxylic ester which is hydrogen gas absorbing at a temperature between 40.degree. and 100.degree. C., and
- b. 5 to 30 percent by volume of an alpha unsaturated alkene normally liquid at room temperature dissolved therein, said alkene containing from 10 to less than 20 carbon atoms and having a significantly higher hydrogen gas absorbing value than the dielectric liquid aromatic ester,
- c. said composition being essentially halogen free.
A dielectric liquid composition for use as a dielectric liquid under electrical stress conditions comprising in combination
- a. a dielectric liquid carboxylic acid ester medium which is hydrogen gas absorbing between 40.degree. C. and 100.degree. C.
- b. an olefinic material having only aliphatic components dissolved in said dielectric liquid medium
- c. said olefinic material constituting greater than about 5% by volume of said dielectric liquid medium
- d. said olefinic material having a gas absorptivity value under electrical stress and in the presence of hydrogen of at least about 10 microliters per minute higher than that of said medium under similar conditions.
1 more element
Dependencies are inferred from the claim text.