Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) - Manual (Page 82)

78 Rockwell Automation Publication 7000-IN006B-EN-P - May 2013
Chapter 5 Commissioning the Drive
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), and you can monitor the lights on the firing circuit
without putting the drive into gating test mode. There are 4 LEDs on the firing
card, illustrated in the following diagram:
Figure 49 - SGCT healthy LEDs
While the drive is idle without gating, LEDs 4 (Green), 3 (Green), and 1 (RED)
should be on while LED 2 (Yellow) is off. If any other combinations of LEDs are
illuminated, refer to the the PowerFlex 7000 ‘B’ Frame User Manual’s
“Component Definition and Maintenance” section for instructions on
troubleshooting the SGCT firing cards.
When you put the drive into gating test mode, the inverter automatically enters
the test pattern gating mode.
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.
SGCT SGCT
LED 4 (Green)
LED 3 (Green)
LED 2 (Yellow)
LED 1 (Red)