Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 114)

114 Rockwell Automation Publication 7000-IN012B-EN-P - June 2014
Chapter 4 Commissioning the Drive
Figure 81 - Sample waveforms: 20 deg phase shift between master and 2 slave bridges
Verify the phase shift is:
• V2uv must be 0º
• V3uv must be -20º
• V4uv must be +20º
Harmonic Analysis (required
for PWM drives only) Measure the harmonic (resonance) levels at the input to the drive. If you notice
considerable distortion in the waveforms, you MUST send those waveforms to
MV Support via e-mail at [email protected], and then call
519-740-4790 (option 1) to discuss the issue and action plan. After-hours, call
(519-503-0346) to talk with MV Tech Support Specialist. Outside North
America, call 1-440-646-3434 and request MV Tech Support.
Summary:
• Close all drive input contactors. If the drive input contactor configuration
is set to NOT RUNNING, temporarily change it to ALL FAULTS.
• Verify the drive is not running when capturing these waveforms.
• Capture line voltage at ACB test point “V2uv” and line current at ACB
test point “I2u”.
• Label the waveforms as “V2uv”, and “I2u”.
• Save the worksheet as “Harmonics (Drive Not Running)”.
Table 5 - Oscilloscope Settings
Oscilloscope Time Base Wave Form Test-Point Waveform
Label Sheet Name
Chan. 1 10 ms/div. Line Voltage V2uv V2uv Harmonics (drive
not running)
Chan. 2 Line Current I2u V2vw