Hydraulic control system for electric circuit-breakers

Details Hydraulic control system for electric circuit-breakers Hydraulic control system for electric circuit-breakers

1979-01-02

1980-05-27

Geoghegan, Edgar W.

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

60413, 60484, 91461, F15B 13043, F15B 102

Patent

active

042044618

ABSTRACT:
The closure and trip pilot valves of a circuit-breaker control unit are actuated by a hydraulic device controlled by a pressure drop which appears in control lines in response to the transient opening of a drain electrovalve within a control cubicle. Thus the pressure-drop hydraulic signal transmitted from a single central control cubicle for closing or tripping a circuit-breaker dispenses with the need for any electrical system and permits the control of a plurality of circuit-breakers or breaker modules solely by means of small-section lines providing hydraulic connections between the central control cubicle and each breaker control unit.

REFERENCES:
patent: 2900960 (1959-08-01), Gratzmuller
patent: 2933069 (1960-04-01), Gratzmuller
patent: 2948262 (1960-08-01), Gratzmuller

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