Allen-Bradley 20G - How to Evaluate a Powerflex 750-Series Internal Resistor

32 Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017
Chapter 3 Evaluating the PowerFlex 7-Class Internal Resistor
Figure 16 - PowerFlex 700 – 480 Volt, Frame 1
Figure 17 - PowerFlex 700 – 480 Volt, Frame 2
How to Evaluate a PowerFlex
750-Series Internal Resistor
Calculate required joule rating (joules = watt-seconds):
Record Joule Rating (can not exceed 10,500 watt-seconds):
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
480V Frame 1
Decel Time (Seconds)
% Peak Power
0
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
480V Frame 2
Decel Time (Seconds)
% Peak Power
ws =
P
b
2
------


t
3
t
2
– watt-seconds=