Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 313)

Component Definition and Maintenance 6-23
7000 “B” Frame 7000-UM150I-EN-P – June 2013
Matched set
3 SGCTs
Module housing
Temperature
sensing board
Clamp head
Matched set
3 SGCTs
Clamp Base
Temperature
Feedback board
Matched set
3 SGCTs
Module housing
Temperature
sensing board
Clamp head
Matched set
3 SGCTs
Clamp Base
Temperature
Feedback board
Figure 6.17 – 6-Device PowerCage
SGCT and Snubber Circuit
With all power semi-conductor or thyristors, the SGCT must have a
snubber circuit. The snubber circuit for the SGCT is comprised of a
snubber resistor in series with a snubber capacitor.
Figure 6.18 – SGCT and snubber circuit