Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 170)

170 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 3 Diagnostics and Protection
Duty Cycle for the Motor Overload
When the motor is cold, this function enables 3 minutes at 150%. When the
motor is hot, it enables 1 minute at 150%. A continuous load of 102% is allowed
to avoid nuisance faults. The duty cycle of the motor overload is defined as
follows. If operating continuous at 100% FLA, and the load increases to 150%
FLA for 59 seconds and then returns to 100% FLA, the load must remain at
100% FLA for 20 minutes to reach steady state.
Charging Overload Hz
Co
nt
in
uous R
atin
g
OL % = 10
OL % = 25
OL % = 50
150%
100%
20 Minutes
1 Minute 1 Minute