Compressed dielectric gas high-tension circuit breaker

Details Compressed dielectric gas high-tension circuit breaker Compressed dielectric gas high-tension circuit breaker

1987-04-01

1988-06-28

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148R, H01H 3388

Patent

active

047541091

ABSTRACT:
A compressed dielectric gas high-tension circuit breaker comprising: a fixed assembly comprising main contacts and arcing contacts; a moving assembly comprising main contacts and arcing contacts; a blast chamber comprising a piston which moves on separation of the contacts to urge compressed blast gas towards a blast nozzle situated in the zone where an arc is struck; and a thermal volume; wherein the thermal volume is in communication with the downstream portion of the blast nozzle via channels and passages extending the path between the thermal volume and said nozzle, said communication being closed by a calibrated non-return valve which opens only when the pressure in said channels and in said passage reaches a threshold value, said non-return valve closing the passage between the blast chamber and the nozzle when said communication is opened.

REFERENCES:
patent: 4649243 (1987-03-01), Thuries
patent: 4650941 (1987-03-01), Thuries et al.
patent: 4650942 (1987-03-01), Perret

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