Electrical capacitor having an improved dielectric system...

Details Electrical capacitor having an improved dielectric system... Electrical capacitor having an improved dielectric system...

H - Electricity

01

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31/100, 334/25

H01G 13/00 (2006.01) H01B 3/24 (2006.01) H01G 4/22 (2006.01)

Patent

CA 1070102

ELECTRICAL CAPACITOR HAVING AN IMPROVED DIELECTRIC SYSTEM AND A METHOD OF PROCESSING THE CAPACITOR Abstract of the Disclosure An electrical capacitor having an improved dielectric system. The capacitor includes alternate layers of metal foil and polymeric dielectric film which is impregnated with a liquid dielectric composition composed of a mixture of mono-halogenated diphenyl oxide and a mono-halogenated alkyl diphenyl oxide where the alkyl group contains from 1 to 20 carbon atoms in the molecule. In processing the capacitor, the capacitor casing is vacuum dried at room temperature and the dielectric liquid is separately agitated under vacuum to remove gas from the liquid. The degassified liquid is introduced into the casing and the liquid is subjected to a vacuum while maintaining the capacitor at room temperature to impregnate the polymeric layers with the liquid. The capacitor has improved corona characteristics and low dielectric losses, and the liquid dielectric composition is substantially biodegradable.

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