Danfoss VACON 1000 Operating Manual page 103

Operating Guide | VACON® 1000
Table 18: Checklist of Medium-voltage Power Commissioning Tasks
Item
Make sure that the motor cable shield is grounded at the
drive and motor ends of the cable.
Confirm that there are no power factor correction capaci-
tors connected to the motor cable.
Test the drive with the motor (no load). See
Motor (No Load).
Test the DCS operation of the drive. See
Test the drive under load. See
Tune the control parameters as necessary to achieve the
required operational specifications of the application.
Collect all the necessary device instruction manuals, draw-
ings, and materials, and save them.
8.8 Commissioning Procedures
8.8.1 Dielectric Withstand Test
1. Disconnect the input and output cables.
2.
Short the input terminals (3-phases).
3.
Short the output terminals (3-phases).
4. Short the transformer auxiliary winding terminals (3-phases) and grounding.
5. Short all power cell input terminals and output terminals.
6.
Disconnect the neutral grounding resistor connected to power cell U1/V1/W1.
Only if the neutral grounding resistor is installed.
7. If installed, disconnect the surge arrestor, and the input and output voltage divider from the HV terminal.
Only if the surge arrestor is installed.
8. Test the input and output voltages.
a.
If the input voltage and output voltage ratings are not the same, conduct the dielectric withstand test separately.
b.
If the input voltage and output voltage rating are the same, conduct the dielectric withstand test covering both input and
output.
8.8.1.1 Testing Input and Output Together
1. Connect the shorted input and output terminals to ground.
2. Measure the insulation resistance between the input terminals and ground with a 1000 V megohmmeter.

The resistance must be >100 MΩ.
3. Apply power frequency high voltage at the input terminal referred to ground for 5 s.
No breakdown and flashover are allowed.
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8.8.6 Test with
8.8.7 DCS Test.
8.8.8 Test with Load.
(continued)
Comments Date completed Employee
(dd/mm/yyyy)
AQ363633621020en-000401 / 172F3117D |
Commissioning
103