Hydraulic device for a hydraulic drive for a high-voltage power circuit-breaker (high-voltage circuit-breaker)

摘要

The invention relates to a hydraulic device for a hydraulic drive for a high-voltage power circuit-breaker, having a drive piston for the movable contact piece, whose both piston ends are connected in the switched-on state to a high-pressure reservoir and are subjected at both ends to the action of high-pressure fluid, having a changeover (transfer, selector) valve, which for the purpose of switching off, releases to the fluid in the space having the larger piston area a path to the low-pressure space, and having at least one switch-on and switch-off pilot valve for driving the changeover valve. An adjustable delay volume (50) for the fluid is connected in parallel with the at least one switching-off pilot valve (44, 45). <IMAGE>