Method of current interruption using puffer type gas circuit breaker with combined-action of cylinder and piston
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United States of America Patent
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Mar 4, 2008
Grant Date -
Jul 13, 2006
app pub date -
Dec 6, 2005
filing date -
Dec 6, 2004
priority date (Note) -
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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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