AEG VB 40.5 User Manual page 8

2-2-1 Energy storage
The energy required for closing the circuit breaker is provided by the closing spring. Energy storage
can be done either by motor or by hand with energy storage handle.
Energy storage operation: it is carried out by the energy storage motor 7 fixed on the frame or by
inserting the energy storage handle into the manual energy storage shaft 8 and shaking it clockwise. The
gear system is driven by motor output shaft 9 for electric energy storage, and the gear system is driven by
manual energy storage shaft 8 for manual energy storage. When the small gear rotates, it drives the big
gear to move together, thus pulling the energy storage spring to store energy. When the energy storage
position is reached, the energy storage holding block is supported by the energy storage holding block to
separate the clutch and maintain the energy storage position. The energy storage indicator board shows
the tension state of the tension spring, and the energy storage is completed. The micro switch cuts off the
power supply of the energy storage motor, and the circuit breaker is in the closing ready state.
2-2-2 Closing
During the closing process, whether manually pressing the "closing" button or remote operation to
make the closing coil 12 act, the energy storage holding device can be turned away from the energy
storage holding block. Under the action of the closing spring force, the cam drives the cam to rotate, and
the cam drives the connecting rod mechanism to drive the insulating rod 23 and the moving contact of the
arc extinguishing chamber to close.
After the closing action is completed, the opening holding switch and the opening half shaft are kept
in the buckle state. At the same time, the energy storage indicator board and auxiliary switch are reset,
and the motor power supply circuit is connected. If the external power supply is also connected, it will
enter the energy storage state again, and the connecting rod will pull the on / off indicator to indicate the
position of "┃", at the same time, pull the counter to realize counting, and drive the connecting rod to pull
the spindle to drive the auxiliary switch to switch.
Note: when the circuit breaker is in the closing state or the closing locking device is selected but the
external power supply is not connected, the circuit breaker is in the process of pushing, or the operating
handle of the pushing mechanism is not pulled out, the closing operation cannot be performed.
2-2-3 Opening
It can not only press the "opening" button, but also connect the external power supply to make the
opening coil or over-current coil act, so that the opening holding switch and the opening half axis are
unlocked to realize the opening operation. The energy stored by the contact spring and the opening
spring 25 separates the dynamic and static contacts of the arc extinguishing chamber 21. In the later stage
of the opening process, the hydraulic buffer absorbs the residual energy and limits the opening position.
Pull the "O" connecting rod to switch off the switch.
2-3 Anti misoperation interlock
The circuit breaker can provide perfect anti misoperation function
1. After the closing operation of the circuit breaker is completed, the closing interlocking board 18
rotates against the closing board 13, and it cannot be closed again when the circuit breaker is not opened.
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