Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 212)

4-58 Commissioning
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
Press the start button and the drive should start running, pumping 0.1 pu (10%) of rated
current through the DC link. Alpha Rectifier should be approximately 90°-92°.
We can also check the Idc Reference and
Feedback. Press EXIT [F10], and scroll back
down to Current Control and press Enter.
Idc reference should be at 0.100 pu and Idc
Feedback should be around that same number.
Ensure that Idc error stays around 0.
The Idc waveform can be observed from T21 (Idc1) on the ACB board. The test point should
show 6 ripples per cycle for a 6-pulse drive. The waveform should have an offset of 0.5V for
each 0.1pu of Idc Test Command. The waveform should also never have any of the low
points between ripples go to 0V. This would indicate a problem with the DC Link cabling.
See the troubleshooting section for sample waveforms.
Press MODIFY [F7], and increase Idc to .2
pu, and repeat the process. Go as high as 0.7
pu in 0.1p.u steps for 18P, and 0.3 pu in
0.1pu steps for AFE, verifying each level as
you increase the current. For AFER, the Idc
test is limited to 0.3 Idc reference. If there is
a current meter somewhere on the input to
the transformer/drive, check the current to
ensure that it matches up with what you think
we are pumping.
When we are satisfied everything is OK,
bring the IDC current down in steps of .1 pu
to 0, and then stop the drive. Return to the
Feature Select parameter group and change
Operating Mode back to Normal.