Puffer-type gas circuit breaker

Details Puffer-type gas circuit breaker Puffer-type gas circuit breaker

1992-02-20

1993-07-20

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148R, H01H 3388, H01H 3391

Patent

active

052295613

ABSTRACT:
A puffer type gas circuit breaker includes arc extinguishing gas filled in the interior of the gas circuit breaker, fixed contact, a movable contact disposed in an opposed relationship with respect to the fixed contact so as to come into contact therewith, a fixed piston and a drive shaft slidably extends through the fixed piston, and drives the movable contact toward and away from the fixed contact. A puffer cylinder is slidably fitted on the fixed piston, with the puffer cylinder cooperating with the fixed piston to define a puffer chamber, within the puffer cylinder. An outer cylinder is mounted on an outer periphery of the puffer cylinder to form a thermal puffer chamber outside the puffer cylinder. A cover covers an outer surface of the movable contact, with a first insulating nozzle surrounding the cover to form a first gas flow passage for guiding the arc extinguishing gas from the puffer chamber to an arc generating portion. A second insulating nozzle surrounds the first insulating nozzle to form a second gas flow passage for guiding the arc extinguishing gas from the thermal puffer chamber to the arc generating portion.

REFERENCES:
patent: 3996439 (1976-12-01), Tokuyama et al.
patent: 4754109 (1988-06-01), Thuries et al.
patent: 4939322 (1990-07-01), Kashimura et al.
patent: 5072084 (1991-12-01), Seki et al.
patent: 5079391 (1992-01-01), Koyanagi et al.

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