2015 年 81 巻 822 号 p. 14-00402
A hydraulic operation stabilizing system was developed for a hydraulic operating mechanism of a gas circuit breaker (GCB). Air bubbles and cavities, created in hydraulic fluid by the movement of the operating mechanism, have an effect on the movement of valves and pistons within the operating mechanism. The hydraulic operation stabilizing system consists of a hydraulic circuit and a latch system. The purpose of the hydraulic circuit is to limit the change in pressure during the initial operating time of the open and close operation, and to keep the pressure high after the operation has been completed. The latching system is used to control the movement of the main piston. The stabilizing system also detects the piston position at its open end, and the control valves through a simple hydraulic circuit and not by electrical means. An experimental hydraulic mechanism with an operation stabilizing system was built, and stable operations were confirmed.
