Electrical contact construction for air-blast circuit breakers

Details Electrical contact construction for air-blast circuit breakers Electrical contact construction for air-blast circuit breakers

H - Electricity

01

H

306/233

H01H 33/04 (2006.01) H01H 33/70 (2006.01) H01H 33/91 (2006.01)

Patent

CA 1133549

Abstract of the Disclosure An electrical contact construction for air-blast circuit breakers, particularly blast-piston or "puffer" type breakers, which subject the arc drawn during current interruption to a compressed-gas blast as well as a magnetic-force effect which lengthens the arc. To increase the inter- ruption capacity of such breakers, and particularly to improve arc behavior during the interruption process, a tubular member is disposed within the interior spaces of the tubular contacts of such a breaker in which the switch- ing gases flow. The member has an inner surface which is conically shaped and is matched to the contour of openings provided in nozzle members dis- posed at the end faces of the tubular contacts to improve gas flow.

338979

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