Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 81)

Rockwell Automation Publication 7000-IN012B-EN-P - June 2014 81
Commissioning the Drive Chapter 4
18 Pulse Phasing Test Prior to applying medium voltage and running the drive, it is important to verify
the phase rotation on the input of all 18 Pulse drives. The following tests do not
need to be performed on AFE rectifier drives unless they incorporate
synchronous transfer:
• Line Terminal Resistance Measurements
• Application of Medium Voltage Power
– Compare the voltage feedback from all 9 test points in the ACB board
to ensure proper phasing.
Failure to perform the recommended tests will result in poor drive performance
and may result in drive converter damage.
Line Terminal Resistance Measurements
Measuring the resistance between the drive line cable terminals will quickly
identify if there is inter-wiring between the 0
º, +20º, and -20º bridges in the
isolation transformer.
Figure 63 - Line terminal designations
2U
2V
2W
3W
3V
3U
4W
4V
4U 2U
2V
2W
3W
3V
3U
4W
4V
4U