Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) User Manual
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Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Appendix C Snubber Testing
Figure 259 - SCR gate-to-cathode test
The resistance value from gate-to-cathode should be between 10 Ω to 20 Ω. A
value close to 0 Ω indicates that there is an internal short in the SCR. An
extremely high value indicates that the gate connection in the device has broken.
If a Gate-to-Cathode test reveals a damaged SCR, refer to
Definition and Maintenance on page 23
for the SCR replacement procedure.
Test points for gate-to-cathode
resistanced on Phoenix connector
Disconnect SCR Phoenix
connector from board.
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