Danfoss VACON 1000 Operating Manual page 130

Operating Guide | VACON® 1000
Procedure
1.
Isolate the power cell from earth ground and separate it from personnel. Make sure that no wires are connected to the power
cell output.
2. Connect the wires as shown in
1000 V DC
Power
supply
Figure 100: DC Supply Wiring Diagram
3.
Turn on the DC supply. To prevent DC supply overcurrent protection, step up the input voltage slowly to 30% of the power cell
nominal voltage 975 V DC. Maintain 30% voltage for 5 minutes.
See Figure 99.
4. Slowly increase the DC supply input voltage to 50%. Maintain the voltage for 10 minutes.
5. Slowly increase the DC supply input voltage to 80%. Maintain the voltage for 15 minutes.
6.
Slowly increase the DC supply input voltage to 100%. Maintain the voltage for 15 minutes.
7.
Once the process is complete, decrease the voltage source to zero and turn off the DC suppply.
8. Disconnect the wires from the power cell and DC supply.
9.
Wait for 15 minutes for the power cell capacitors to discharge fully.
10.
Use a measuring device to make sure that there is no voltage.
11. Restore the original wiring.
130 | Danfoss A/S © 2024.12
Figure 100. Connect the DC supply to any 2 of the power cell input phases.
F1
AC
F2
F3
DC
DC
C
AC
Power cell
Maintenance
AQ363633621020en-000401 / 172F3117D