Operating device for enclosed high voltage circuit breakers

摘要

An operating device for a high pressure circuit breaker enclosed in an elongated casing filled with compressed gas with a high-pressure chamber and a low-pressure chamber includes a driving arrangement operated by compressed gas. A compressed gas valve is provided for alternatively connecting the driving means to the high-pressure chamber and the low-pressure chamber. The device has openings into the high-pressure space and the low-pressure space respectively communicating with the driving arrangement. There is a valve seat around the first opening and a movable valve member engageable with the valve seat to close this opening. A space is provided on the opposite side of the valve member from the opening which is permanently connected with the high-pressure chamber. An impulse member outside the high-pressurechamber through an operating rod extending perpendicular to the longitudinal axis of the casing engages the valve member for moving the valve member away from the valve seat. Such movement closes the opening from the low-pressure chamber to the driving arrangement.