Method of current interruption using puffer type gas circuit...

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Air-current blowout

Reexamination Certificate

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Details

C218S059000

Reexamination Certificate

active

11294579

ABSTRACT:
A puffer type gas circuit breaker has a piston, which is connected with a center shaft via a link mechanism. At an initial stage of an interruption operation, the link mechanism drives a puffer cylinder and the piston both in an interruption direction while maintaining an almost constant distance therebetween. Even when a pressure rise occurs in a compression chamber by the heat of an arc generated in accordance with opening between a fixed arc contact and a movable arc contact, the pressure rise does not become an operation counterforce to an operator. At a final stage of the interruption operation where the fixed arc contact is removed from a throat of an insulating nozzle, the link mechanism drives the piston in an almost stopped status.

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