Combined type fluid pressure driving apparatus

A combined type fluid pressure driving apparatus comprising:

• a metal container including a hollow support insulator and a plurality of hollow receiving insulators, wherein said metal container, hollow support insulator, and hollow receiving insulators are sealed with insulating gas;
• circuit breaker and disconnecting switches each having a stationary electrode fixed in each of the hollow receiving insulators and a movable electrode accommodated therein so as to be separated from or contacted to the stationary electrode, said circuit breaker and disconnecting switches having contacts, respectively;
• insulated operating rods accommodated in the hollow support insulator and operatively connected to the movable electrodes of the circuit breaker and the disconnecting switches;
• a mechanical box arranged at an end of the hollow support insulator;
• a fluid pressure operating device received in the mechanical box and driven by fluid pressure, said fluid pressure operating device comprising:
• a plurality of fluid pressure cylinders switching and driving the contacts of the circuit breakers and the disconnecting switches, respectively;
• a plurality of fluid pressure control valves for independently driving the fluid pressure cylinders;
• an accumulator for storing a high-pressure working fluid supplied commonly to the fluid pressure cylinders and fluid pressure control valves;
• a pump for supplying the high-pressure working fluid into the accumulator;
• and a tank for storing a low-pressure fluid discharged from the fluid pressure cylinders;
• and
• a connecting mechanism disposed in the metal container,
• wherein an operating force of the fluid pressure operating device is transmitted to the movable electrodes of the circuit breakers and the disconnecting switches through the insulation operating rods and the connecting mechanism so that each contact of the circuit breaker and the disconnecting switches is switched.