Fluid-blast type circuit breaker comprising valve controlled...

Details Fluid-blast type circuit breaker comprising valve controlled... Fluid-blast type circuit breaker comprising valve controlled...

H - Electricity

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H

306/229

H01H 33/80 (2006.01) H01H 33/98 (2006.01)

Patent

CA 1098571

CIRCUIT INTERRUPTER ABSTRACT OF THE DISCLOSURE An improved self-extinguishing puffer-type circuit interrupter comprising a casing filled with an arc extinguishing gas such as SF6 gas and including a pair of separable contacts, wherein the arc extinguishing fluid is pressure-raised by the energy of an electric arc, established upon the separation of the contacts, to be puffed to the arc to extinguish it. The interrupter includes means for releasing the arc extinguishing gas to the exterior of the extinguishing chamber when the pres- sure within the pressure raising chamber in which the gas is pressurized by the arc energy reaches a certain value. The interrupter may include a valve, disposed between the pressure- raising chamber and the arc extinguishing chamber, adapted to open only when the pressure in the pressure-raising chamber is less than the above-mentioned certain pressure value.

299577

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