Fluid-blast circuit breaker with arc-closed pressure chamber

Details Fluid-blast circuit breaker with arc-closed pressure chamber Fluid-blast circuit breaker with arc-closed pressure chamber

H - Electricity

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H

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H01H 33/64 (2006.01) H01H 33/98 (2006.01)

Patent

CA 1095569

ABSTRACT OF THE DISCLOSURE A circuit interrupter comprises a pair of contacts in a container filled with gas for arc extinction; an insulation nozzle around the contacts to form an arc chamber; and a gas chamber which is connected to the are chamber during separation of the contacts. The gas pressure in the arc chamber and the gas chamber is increased by the energy of the arc generated during separation of the contacts. When the arc current is large, the flow-out of the gas from the arc chamber and the gas chamber is decreased by the arc whereas the high pressure gas in the arc chamber and the gas chamber is discharged through the insulation nozzle into the container at the time decreasing the arc current near zero whereby the are is interrupted by the gas flow discharged.

299508

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