Hydraulic system for simultaneous control, especially for the co

Details Hydraulic system for simultaneous control, especially for the co Hydraulic system for simultaneous control, especially for the co

1978-11-15

1981-01-06

Hershkovitz, Abraham

Electricity: circuit makers and breakers

Fluid pressure

Plural switch

91189R, 91433, 91451, 91517, 200 81R, 200 815, 200145, 91471, H01H 3524, F15B 1116

Patent

active

042438551

ABSTRACT:
Two circuit breakers or circuit breaker modules are actuated by hydraulic jacks fed by supply and drain valves operated by a single closing-operation control unit. A differential pressure detector is subjected to the pressure of the two jacks. In the event of a relative variation in the jack-operating times, the free piston of the detector actuates a switching device which connects the supply and drain valves to the drain tank, thus preventing the complete performance of any non-simultaneous operation of the circuit breakers.

REFERENCES:
patent: 2365095 (1944-12-01), Miller
patent: 3030930 (1962-04-01), Gratzmuller
patent: 3480328 (1969-11-01), Carlson
patent: 3659498 (1972-05-01), Richardson
patent: 4101746 (1978-07-01), Grieger

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