ZW32 Outdoor Vacuum Circuit Breaker

Operation Principle

1. Principle of manual mechanism operation
■ Closing operation: firstly pull the energy storage handle to store energy, and the applied operating torque increases from small to large. When the closing spring passes through the middle moment, the closing spring releases energy, which urges the energy storage system to rotate counterclockwise and drives the arm to rotate. The drive shaft closes the outdoor vacuum circuit breaker, and at the same time, the split arm catches the opening half shaft to make the circuit breaker in the closing state. When the mechanism is in the closing state, the cam and the rotating shaft sleeve are disengaged, and the mechanism cannot be closed again.
■ Opening operation: After the breaker is closed, pull the opening handle or when the current exceeds the setting value of the anti-surge device, the over-current coil is driven, both make the brake half-axis rotation, the opening arm unbuckle, and the transmission rod makes the circuit breaker opening under the drive of the spring.
2. The principle of motor mechanism
■ Energy storage operation: pulling the energy storage handle, or the energy storage motor rotates, the cam is rotated under the drive gear, and the closing spring is gradually elongated. After the spring passes through, the cam is held by the positioning member and no longer rotates. In preparation for the closing state; at the same time the cam and the drive shaft are disengaged so that the mechanism cannot store energy again.
■ Closing operation: After the energy storage is completed, pull the manual closing handle or apply a voltage to the closing coil to make the closing half shaft rotate. The closing arm and the closing half shaft are unbuckled, and the closing spring releases energy to drive the transmission shaft. The outdoor vacuum circuit breaker is closed and the opening spring is stored. When the mechanism is in the closing state, the energy storage operation is performed again, and the closing spring is again elongated. After the spring passes the middle, the closing half shaft is buckled by the interlocking device to prevent the mechanism from accidentally closing the brake. In the closed state of energy storage, the mechanism is in the reclosing state, which can achieve a "O-0.3S-CO" reclosing operation.
Opening operation: After the outdoor vacuum circuit breaker is closed, the sub-gate handle is pulled or a voltage is applied to the sub-gate coil, or the over-current coil is driven when the line current exceeds the set value of the anti-surge current device, so that the sub-gate is rotated by a half shaft and opened. The arm is released and the transmission lever is opened by the opening spring to open the outdoor vacuum circuit breaker.
Note: The overcurrent coil of the operating mechanism is a short-time working system and cannot be used for a long time.
Over-current protection and mechanism control electrical schematic diagram of circuit breaker shown in Figure 3. (Note: Based on the secondary wiring diagram of the circuit breaker)

1. Principle of manual mechanism operation■ Closing operation: firstly pull the energy storage handle to store energy, and the applied operating torque increases from small to large. When the closing spring passes through the middle moment, the closing spring releases energy, which urges the energy storage system to rotate counterclockwise and drives the arm to rotate. The drive shaft closes the outdoor vacuum circuit breaker, and at the same time, the split arm catches the opening half shaft to make the circuit breaker in the closing state. When the mechanism is in the closing state, the cam and the rotating shaft sleeve are disengaged, and the mechanism cannot be closed again.■ Opening operation: After the breaker is closed, pull the opening handle or when the current exceeds the setting value of the anti-surge device, the over-current coil is driven, both make the brake half-axis rotation, the opening arm unbuckle, and the transmission rod makes the circuit breaker opening under the drive of the spring.2. The principle of motor mechanism■ Energy storage operation: pulling the energy storage handle, or the energy storage motor rotates, the cam is rotated under the drive gear, and the closing spring is gradually elongated. After the spring passes through, the cam is held by the positioning member and no longer rotates. In preparation for the closing state; at the same time the cam and the drive shaft are disengaged so that the mechanism cannot store energy again.■ Closing operation: After the energy storage is completed, pull the manual closing handle or apply a voltage to the closing coil to make the closing half shaft rotate. The closing arm and the closing half shaft are unbuckled, and the closing spring releases energy to drive the transmission shaft. The outdoor vacuum circuit breaker is closed and the opening spring is stored. When the mechanism is in the closing state, the energy storage operation is performed again, and the closing spring is again elongated. After the spring passes the middle, the closing half shaft is buckled by the interlocking device to prevent the mechanism from accidentally closing the brake. In the closed state of energy storage, the mechanism is in the reclosing state, which can achieve a "O-0.3S-CO" reclosing operation.Opening operation: After the outdoor vacuum circuit breaker is closed, the sub-gate handle is pulled or a voltage is applied to the sub-gate coil, or the over-current coil is driven when the line current exceeds the set value of the anti-surge current device, so that the sub-gate is rotated by a half shaft and opened. The arm is released and the transmission lever is opened by the opening spring to open the outdoor vacuum circuit breaker.Note: The overcurrent coil of the operating mechanism is a short-time working system and cannot be used for a long time.Over-current protection and mechanism control electrical schematic diagram of circuit breaker shown in Figure 3. (Note: Based on the secondary wiring diagram of the circuit breaker)