Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) - Manual (Page 93)

Rockwell Automation Publication 7000-IN006B-EN-P - May 2013 89
Commissioning the Drive Chapter 5
Input Phasing Check
There are 9 voltage test points on the ACB board that will allow you to look at
each voltage level individually.
These test points are labeled as follows:
Table 1 - ACB Test Points and Associated Voltage Signals
All of these test points can be measured to either the Analog Ground (AGND)
on the board or the TE ground in the low voltage section. You can use V2uv as
your reference (trigger on this waveform) and verify all the other test points using
the table above. It is easier to use zero crossings on your oscilloscope as the
reference points when checking the phase shifts.
Verify the following relationships:
1. V and W in each bridge should be lagging U by 120° and 240°, respectively.
2. 3U, 3V, and 3W should be lagging 2U, 2V, and 2W by 20° (-20°),
respectively.
Test Point Description Isolation Transformer:
Secondary Phasing and Bridge
Phase Relationship
with respect to V2uv
(2U)
V2uv 2u Master 0
°
V2vw 2v Master -120
°
V2wu 2w Master -240
°
V3uv 3u Slave 1 -20
°
V3vw 3v Slave 1 -140
°
V3wu 3w Slave 1 -260
°
V4uv 4u Slave 2 +20
°
V4vw 4v Slave 2 -100
°
V4wu 4w Slave 2 -220
°