Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) - Manual (Page 69)

Rockwell Automation Publication 7000-IN006B-EN-P - May 2013 65
Commissioning the Drive Chapter 5
Snubber Resistance (SCR Device)
Access to the snubber resistor is not required to test the resistance. The snubber
circuit test point is located within the PowerCage under the heatsinks. For each
device, there is one test point. To verify the resistance, measure the resistance
between the test point and the heatsink above.
Figure 40 - Snubber resistance test
If the resistor is found to be out of tolerance, refer to the PowerFlex 7000 ‘B’
Frame User Manual’s “Component Definition and Maintenance” section for
detailed instructions on how to replace the snubber resistor assembly.
Resistance value between Test Point
and heatsink to its left is snubber resistance
Sharing Resistance
Snubber Resistance Snubber Capacitor
Testpoint
To Gate
Driver Board
Heatsink Heatsink
Sharing Resistance
Snubber Resistance Snubber Capacitor
Testpoint
To Gate
Driver Board
Heatsink Heatsink