Yaskawa GPD 506/P5 Section Two - Manual (Page 22)

PP.P5G5.02Troubleshoot
Page 22
Rev. 06/11/2003
Output Current Waveform
Step 11
Test Equipment - Ungrounded oscilloscope with clamp on current probe.
Set scope to 10mV/division and 5mSeconds, in order to observe the output current waveform.
1. Using the clamp on current probe, clamp the probe to one of the output leads T1, T2, or T3.
2. Run the inverter up to 60 Hz, watching the waveform as it accelerates.
3. Compare the waveform with the waveform shown below. (Output will vary with load)
4. Stop the inverter.
5. Repeat steps 1 through 4 with the two remaining output leads.