Gas-blast type circuit interrupter

Details Gas-blast type circuit interrupter Gas-blast type circuit interrupter

1978-03-23

1980-09-09

Truhe, J. V.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148B, 200148H, H01H 3370

Patent

active

042219434

ABSTRACT:
An improved self-extinguishing puffer-type circuit interrupter comprising a casing filled with an arc extinguishing gas such as SF.sub.6 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 pressure 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 that above-mentioned certain pressure value.

REFERENCES:
patent: 3538282 (1970-11-01), Leeds
patent: 4139752 (1979-02-01), Itai et al.

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