Gas-blast switch

Details Gas-blast switch Gas-blast switch

1980-09-02

1983-01-11

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200150G, H01H 3388

Patent

active

043683673

ABSTRACT:
A fixed contact element and a movable contact element can be brought into and out of engagement with one another within a switching chamber. The switching chamber flow communicates, on the one hand, by means of a blast nozzle, closed by the movable contact element in the cut-on position of the gas-blast switch, with an expansion chamber and, on the other hand, flow communicates by means of a check or a non-return valve which opens in the direction of the switching chamber, with the pressure side of a pump cylinder arranged in the expansion chamber. Operatively associated with the pump cylinder is a movable pump piston which pressurizes the pump cylinder during a cut-off stroke with a time-delay. To reduce the constructional expenditure and to increase the operational reliability the pump piston is rigidly connected with the movable contact element, whereas the length of the pump cylinder is less than the switching stroke of the movable contact element, so that the pump piston is located externally of the pump cylinder at the region of the cut-on position of the gas-blast switch.

REFERENCES:
patent: 2055312 (1936-09-01), Ruppel
patent: 2459599 (1949-01-01), Strom

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