电磁铁未通电，压缩空气进入起动阀和主阀的空腔。合闸时，合闸电磁铁动作，

The electromagnet is not energized, compressed air enters the cavity of the firing valve and the main valve. When closing, closing solenoid operation, compressed air enters the valve closing start valve drive cylinder, the piston pushed to the left by the rotation of the rotary lever insulator, isolating switch blade to closing position, the auxiliary contact switch interlock immediately closing electromagnet power supply cut off. When opening, opening solenoid operation, compressed air discharge from the main valve chamber to atmosphere through the trigger valve; a main valve piston at the right role compressed air reservoir, a compressed air through the main valve, into the cavity of the support insulator off arc chamber, pushing the movable contact of the main circuit breaker is in the oFF state; then compressed into the orifice of the movable contact, the arc is extinguished, and discharged to the atmosphere through the housing vent. Compressed air entering the main valve, while the delay through the valve into the actuator cylinder piston to the right, so as to promote rotation of the rotary insulator, the isolation switch blades open, the interlock switch contacts auxiliary opening magnet power supply will be immediately cut off.

The electromagnet is not energized and compressed air enters the cavity of the starting valve and the main valve. When closing, the closing electromagnetic iron action, compressed air from the starting valve closing valve into the transmission cylinder, so that the piston to the left through the lever to promote the rotation of the porcelain bottle rotation, isolation switch gate knife to the closing position, auxiliary opening the associated lock contact immediately cut off the closing electromagnetic iron power supply. When the gate is divided, the split gate electromagnet action, compressed air from the main valve cavity through the starting valve drain into the atmosphere, in the storage cylinder compressed air action of the main valve piston to the right, compressed air through the main valve, support porcelain bottle cavity into the arc-out chamber, push open the contact to make the main circuit breaker in a state of disconnect; and through the cover exhaust port drain to the atmosphere. Into the main valve compressed air, while the delay valve into the transmission cylinder, so that the piston to the right, so as to promote the rotation of the porcelain bottle rotation, isolation switch knife open, auxiliary opening the associated lock contact immediately cut off the split electromagnetic iron power supply.

The electromagnet is not energized and compressed air enters the cavity of the starting valve and the main valve. When closing, the closing electromagnet acts, the compressed air enters the transmission cylinder from the closing valve of the starting valve, so that the piston moves to the left and the lever pushes the rotating porcelain bottle to rotate, the disconnector switch knife turns to the closing position, and the interlocking contact of the auxiliary switch immediately cuts off the power supply of the closing electromagnet. When opening, the opening electromagnet acts, and the compressed air is discharged to the atmosphere from the main valve cavity through the starting valve; under the action of the compressed air in the air reservoir, the main valve piston moves to the right, and the compressed air enters the arc extinguishing chamber through the main valve and the cavity supporting the porcelain bottle, pushing the moving contact to make the main circuit breaker in the off state; the compressed air then enters the moving contact nozzle, which extinguishes the arc, and discharges to the atmosphere through the exhaust port of the outer cover 。 At the same time, the compressed air entering into the main valve enters into the transmission cylinder through the delay valve, so that the piston moves to the right, so as to push the rotating porcelain bottle to rotate, the disconnector knife is opened, and the interlocking contact of the auxiliary switch immediately cuts off the power supply of the opening electromagnet.<br>