Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 73)

Rockwell Automation Publication 7000-IN012B-EN-P - June 2014 73
Commissioning the Drive Chapter 4
At the end of the first stack of devices, the right device in the middle stack down
fires, and the pattern continues right to left until reaching the end of the middle
stack. Then the left device in the bottom stack fires and the pattern continues to
the last device, when it returns to the top. This tests for correct fiber optic cables
connected to the corresponding devices.
During commissioning, it is not necessary to use an oscilloscope for SCR firing
tests, although it is required if SCR firing problems occur.
SGCT Firing Test
Unlike the SCR Self-powered gate driver board, the SGCT has an integrated
firing circuit mounted on the device. This circuit derives power from the SGCT
Power Supplies (IGDPS) or from the SPS boards which require a test harness.
You can monitor the lights on the firing circuit without putting the drive into
gating test mode. There are four LEDs on the firing card (
Figure 58 ).
Figure 58 - SGCT healthy LEDs (SPS board not shown for clarity)
ATTENTION: Ensure that the test cable is removed from the drive and that it is
taken out of Test Mode prior to applying Medium Voltage. Failure to do so may
result in personal injury or equipment damage.
WARNING: When testing with the SPS harness is complete, remove the test
harness from all of the SPS boards and remove the SPS test harness from the
power converter cabinet. Do NOT leave the SPS test harness in the power
converter cabinet. Reconnect all of the SGCT snubber connections to the J1
connectors on the SPS boards.
SGCT SGCT
LED 4 (Green)
LED 3 (Green)
LED 2 (Yellow)
LED 1 (Red)