Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 119)

Rockwell Automation Publication 7000-IN012B-EN-P - June 2014 119
Commissioning the Drive Chapter 4
Bypass Contactor Closures
Sample Waveforms
Ch1: Bypass Contactor Close Command (BPC output at ACB, J1-12 & 402)
Ch2: Actual Closure of Bypass Contactor (using 9V battery across contactor
vacuum bottles)
Figure 87 - Sample waveform: Bypass contactor closures
Synchronous Transfer Test: Verify Sync Lead Angle
While simulating a synchronous transfer to determine the best lead angle:
• ensure you have configured and armed the Diagnostic Trend.
• capture motor voltage at ACB test point “Vuv” & bypass voltage at ACB
test point “Vuvs”.
• capture and trigger on falling edge of the DC Link current waveform at
ACB test point “Idc1”.
• label the waveforms as “Vuv”, “Vuvs” and “Idc1”.
• save the worksheet as “Drift @ 15 Degree Lead Angle”, for example.
Table 9 - Oscilloscope Settings
Oscilloscope Time Base Wave Form Test-Point Waveform
Label
Chan. 1 10ms/div. DC Link Current Idc1 Idc1
Chan. 2 Motor Voltage Vuv Vuv
Chan. 3 Bypass Line
Voltage Vuvs Vuvs