Pressurized gas circuit-breaker

Details Pressurized gas circuit-breaker Pressurized gas circuit-breaker

1996-12-18

1998-06-16

Gellner, Michael L.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218 57, H01H 3388

Patent

active

057674710

ABSTRACT:
In a pressurized gas circuit-breaker the mobile contact member is fixed to a connecting rod that passes coaxially through the fixed braking cylinder. The braking cylinder has transverse walls at both ends so as to delimit a cylinder. The connecting rod has a drive abutment that drives the braking piston in a final section of the opening travel, which increases the pressure in the first sub-space and reduces the pressure in the second sub-space. The braking piston is disposed on a bush around the connecting rod, the bush and the connecting rod delimiting an annular cylinder space between the drive member and a counter-abutment on the bush, a pressure being generated when the circuit-breaker opens. In this way a high braking force with no impact is very rapidly obtained.

REFERENCES:
patent: 4041264 (1977-08-01), Grune
patent: 4160888 (1979-07-01), Natsui et al.
patent: 4182942 (1980-01-01), Koyanagi et al.
patent: 4230920 (1980-10-01), Thaler
patent: 4275431 (1981-06-01), Swoish et al.
patent: 4354081 (1982-10-01), Noeske
patent: 4389554 (1983-06-01), Freeman

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