Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 90)

90 Rockwell Automation Publication 7000-IN012B-EN-P - June 2014
Chapter 4 Commissioning the Drive
Input Phasing Check
There are nine voltage test points on the ACB board that will allow you to look at
each voltage level individually.
Table 3 - ACB Test Points and Associated Voltage Signals
The test points are measured to either the Analog Ground (AGND) on the board
or the TE ground in the low voltage section. 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.
3. 4U, 4V, and 4W should be leading 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
°