Snubber capacitance (scr device) – Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control User Manual

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Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014

205

Commissioning

Chapter 4

Figure 189 - Snubber Resistance Test

Refer to

Table 7

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

Component Definition and

Maintenance on page 265 (Chapter 5)

for detailed instructions on how to

replace the snubber resistor assembly.

Snubber Capacitance (SCR Device)

Turn the multimeter from the resistance to capacitance measurement mode.
Proceed to verify the snubber capacitor by measuring from the test point and the
white wire at the 2-pole device snubber plug (labeled snubber).

Measure resistance
between chill block
and test point.

Snubber Test Point

Measure resistance
between chill block
and test point.

Snubber Test Point