Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 247)

4-88 Commissioning
7000-UM150I-EN-P – June 2013 7000 “B” Frame
Monitor the V Line Average (P135), and increase the tap setting on
the drive feed if the measured value is less than 1.03 pu. It is
desirable to have V Line Average read in the 1.03 to 1.07 pu range.
Alpha Line (P327) should be greater than 15

while running at rated
speed and load, indicating how far forward the rectifier is phased.
The input voltage should be increased by tapping up the transformer.
Fill in the following table with data from the various load points. If
possible, capture the running parameters with the printer,
DriveTools, or Hyperterminal as a substitute for recording the data in
the table below. This should be forwarded with all commissioning
data back to Product Support for future reference.
It is also an excellent practice to capture and save critical drive
waveforms at rated speed, rated load. A good list of waveforms to
capture is indicated below:
a) SCB-L unfiltered voltages (Vab1-out, Vbc1-out, Vca1-out, etc.)

b) SCB-L unfiltered currents (In1-out, Ic1-out)
c) SCB-L DC link current (Idcp)
d) SCB-M unfiltered voltages (Vab1-out, Vbc1-out, Vca1-out)
e) SCB-M unfiltered currents (In1-out, Ic1-out)

18-pulse rectifiers have six additional voltage test points.
Capturing each waveform at 2 ms, 5 ms and 10 ms yields best results.
Below are examples of various waveforms taken from actual drives
installed in the field. Please note that 18-pulse rectifier currents are
on the secondary side of the isolation transformer.
Figures 4.20 to 4.23: PWM Rectifier, 4160V, 2000 HP, 249A
Figure 4.20 – DC Current Test @ .3 pu: Idcp (1) vs. Vdc_Avg (2)