Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 244)

Commissioning 4-39
7000 “C” Frame 7000L-UM300I-EN-P – Juen 2013
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 chill blocks. For each device, there is one test point. To verify
the resistance, measure the resistance between the test point and the
chill block above.
Measure resistance
between chill block
and test point.
Snubber Test Point
Measure resistance
between chill block
and test point.
Snubber Test Point
Figure 4.11 – Snubber Resistance Test
Refer to Table 4.B to determine the appropriate snubber resistance
value for the current rating of the SCR used.
If the resistor is found to be out of tolerance, refer to Chapter 6 –
Component Definition and Maintenance for detailed instructions on
how to replace the snubber resistor assembly.