Charging; Closing - Eaton W-VACi 12 kV User Manual

Fig. 6-3: Universal Mechanism Assembly (UMA)
Right Side View
1. Motor
2. Close Button
3. Shunt Closing Release
6.4

Charging

The energy required for a circuit breaker closing is
provided by charging a closing spring using a charging
motor or manually charging with the charging handle.
When electrically charging, the output shaft of the
motor actuates a gear drive system. When manually
charging, the gear driving system is actuated through a
pinion gear that is attached to the charging handle.
Once charged, the indicator will display "CHARGED"
and the motor cutting switch will break the power
supply of the charging motor. The circuit breaker is
now ready for closing.
6.5

Closing

The closing operation is accomplished by either
manually pressing the "CLOSE" button or by remote
operation to actuate the shunt opening release coil.
Once closed, the indicator will read "CLOSED" and the
circuit for the power supply to the motor is returned. At
the same time the counter is actuated to perform the
counting function and the driving linkage actuates the
main auxiliary switch to transfer states of the other
switches and sensors between on and off. The 4 states
of the mechanism can be seen in Figures 6-6 through
Figure6-9 on the following page.
50
1
2
3
4
5
4. Shunt Opening Release
5. Open Button
65A7355H01 November 2011 www.eaton.com
Closing Spring
Gears
Closing Spring
Signaling
Contacts
Fig. 6-4: Universal Mechanism Assembly (UMA) Left
Fig. 6-5: Manual Charging Process
Side View