Danfoss VACON 1000, Руководство по эксплуатации

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Wait for 15 minutes for the power cell capacitors to discharge fully.
Use a measuring device to make sure that there is no voltage.
Restore the original wiring.
9.8.3.2 Reforming with a DC Supply
Required equipment:
DC supply, 0–1000 V DC adjustable, ≥1000 VA
C A U T I O N
During the reforming, observe whether there is any abnormal phenomenon. If there is anything abnormal, open the MCB
immediately.
Make sure that the wiring for the reforming is done correctly.
Check that the power cell fuses are OK.
If there still are problems, contact Danfoss for assistance.
Procedure
Isolate the power cell from earth ground and separate it from personnel. Make sure that no wires are connected to the
power cell output.
Connect the wires as shown in
Illustration 84 . Connect the DC supply to any 2 of the power cell input phases.
AC
F1
F2
F3
DC
DC
AC
C
Power
supply
Power cell
1000 V DC
e3
0b
i7
46
.1
0
Illustration 84: DC Supply Wiring Diagram
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
Illustration 83 .
Slowly increase the DC supply input voltage to 50%. Maintain the voltage for 10 minutes.
Slowly increase the DC supply input voltage to 80%. Maintain the voltage for 15 minutes.
Slowly increase the DC supply input voltage to 100%. Maintain the voltage for 15 minutes.
Once the process is complete, decrease the voltage source to zero and turn off the DC suppply.
Disconnect the wires from the power cell and DC supply.
Wait for 15 minutes for the power cell capacitors to discharge fully.
Use a measuring device to make sure that there is no voltage.
Restore the original wiring.
9.9 Dielectric Withstand Test
Procedure
Disconnect the input and output cables.
Short the input terminals (3 phases).
Short the output terminals (3 phases).
Short the transformer auxiliary winding terminals (3 phases) and grounding.
Short all power cell input terminals and output terminals.
If installed, disconnect the neutral grounding resistor connected to power cell U1/V1/W1.
If installed, disconnect the surge arrestor, and the input and output voltage divider from the HV terminal.
Test the input and output voltages.
If the input voltage and output voltage ratings are not the same, conduct the dielectric withstand test separately.
AQ363633621020en-000201 / 172F3117 | 91 Danfoss A/S © 2021.06
Maintenance
VACON® 1000
Operating Guide