Electrical tree suppression in high-voltage polymeric...

Details Electrical tree suppression in high-voltage polymeric... Electrical tree suppression in high-voltage polymeric...

C - Chemistry, Metallurgy

08

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400/7008, 337/82

C08K 5/34 (2006.01) B01J 19/02 (2006.01) C08K 5/00 (2006.01) H01B 3/40 (2006.01) H01B 3/44 (2006.01) H01B 7/28 (2006.01)

Patent

CA 1326576

TITLE ELECTRICAL TREE SUPPRESSION IN HIGH-VOLTAGE POLYMERIC INSULATION INVENTORS SOLI S. BAMJI ALEKSANDER T. BULINSKI JOHN DENSLEY ABSTRACT Polymeric dielectrics which are exposed to highly divergent electric fields break down more quickly than expected because of the generation of ultra-violet radiation at defect points which degrades the polymer locally and leads to the formation of electrical trees in a polymeric insulation. The use of ultra-violet stabilizers, preferably in combination with reduced concentration of oxygen in the polymer, significantly extends the time to initiation of electrical treeing by preventing photodegradation of the polymer.

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