AEG VB 40.5, User Manual, Page: 6 / 41

2
phases, but also protects each phase circuit from the influence of the external bad environment, prevents
dust and foreign matters from entering the conductive circuit, and reduces the overall size of the circuit
breaker.
2-2 Operating mechanism
The operating mechanism of the circuit breaker is a spring energy storage mechanism. There are
closing unit, opening unit composed of one or several coils, auxiliary switch, indicating device and other
components in the mechanism box; the front is provided with closing and opening button, manual energy
storage operation hole, spring energy storage status indicator board and closing and opening indicator
board.(Fig.1, 2)
1 closing spring
2 closing/opening indicator
3 opening latch
4 charging indicator
5 counter
6 micro-switch
7 charging motor
8 manual charging shaft
9 motor output shaft
10 small gear
11 large gear
12 closing coil
13 closing plate
14 opening coil
15 over-current coil/secondary
tripping coil
Fig .1 front view of operation mechanism