Hydraulic driving device for an electric pressurized-gas switch

Details Hydraulic driving device for an electric pressurized-gas switch Hydraulic driving device for an electric pressurized-gas switch

1986-12-12

1988-03-08

Macon, Robert S.

Electricity: circuit makers and breakers

Fluid pressure

Piston

200148F, H01H 3538, H01H 3388

Patent

active

047300922

ABSTRACT:
In a hydraulic driving device for an electric pressurized-gas switch, the piston-cylinder systems are responsive to pressure from a hydropneumatic pressure accumulator. The driving device is equipped with a hydraulic pump which feeds several pressure accumulators and is controlled by pressure monitors, and with a gas monitoring device for the pressure monitors. For solving the problem of carrying out indirect gas monitoring while feeding several pressure accumulators by one hydraulic pump instead of direct gas monitoring, there is provided at least one threshold switch for measuring the feed pressure of the hydraulic pump as part of the gas monitoring device. By feeding the pressure accumulators which takes place sequentially in time and is controlled on the one hand by the gas monitoring device and by the pressure monitors on the other hand, it is possible to establish a correlation specific as to the pressure accumulator of the gas loss signal delivered by the threshold switch.

REFERENCES:
patent: 3050079 (1962-08-01), Tognella
patent: 3526243 (1970-09-01), Warnemuende et al.
patent: 3832502 (1974-08-01), Grieger et al.
patent: 4101746 (1978-07-01), Grieger et al.
patent: 4581510 (1986-04-01), Bischofberger et al.
Siemens-Zeitschrift, No. 43, (1969), pp. 285-287.

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