Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) - Manual (Page 89)

Rockwell Automation Publication 7000-IN006B-EN-P - May 2013 85
Commissioning the Drive Chapter 5
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 50 - Line terminal designations
There are low resistances between phases through a transformer winding and a
high resistance between transformer windings. Therefore, the expected resistance
measurements are listed in the table below:
If the measurement results are not as described above, the inter-wiring between
the isolation transformer and drive needs to be re-inspected.
Terminal Measurement Points Expected Resistance
2U -> 2V -> 2W Approximately 0
Ω
3U -> 3V -> 3W Approximately 0
Ω
4U -> 4V -> 4W Approximately 0
Ω
#U -> #V -> #W Approximately
∞ Ω
2U
2V
2W
3W
3V
3U
4W
4V
4U 2U
2V
2W
3W
3V
3U
4W
4V
4U