Rockwell Automation Publication 7000L-UM301F-EN-P - March 2020 233
Commissioning Chapter 4
Application of Medium Voltage
Before running the drive on Medium Voltage, it is a good idea to set up the
diagnostic trending feature to capture any information in the event of a fault
during commissioning. REMEMBER TO RESET THE TRENDING
BEFORE LEAVING THE DRIVE IN PRODUCTION.
The diagnostic trending operation of the drive allows you to capture the
relationships of 8 parameters over a period of time. Trending is a valuable tool for
trouble shooting the drive.
Refer to Chapter 5
for instructions on setting up the Diagnostic Trending.
The next test required to test phase rotation requires that medium voltage be
applied to the drive input. Ensure that the drive is thoroughly inspected for debris
and tools prior to energizing the drive. Furthermore, ensure that all protective
barriers have been re-installed before continuing. Ensure that you have taken the
drive out of System Test mode, and have returned to Normal operating mode.
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 12 - 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.
Essentially, you are verifying the following relationships:
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°
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