Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 81)

Operation and Programming
Chapter 5
5-38
Current Limit Setting Parameter 46 -- Current Limit
Units = Seconds
Range = 00/1.5
Factory Setting = 00
Should drive current rise above 140% of rated drive output current, the
drive will attempt to limit current for one minute. Parameter 46 sets the
frequency foldback rate used to decrease current in .1 second increments.
Frequency foldback allows the drive to ramp output frequency down far
enough to temporarily eliminate an overcurrent condition. When Parameter
46 is set to 00, the Current Limit function set by Parameter 46 is disabled
and the drive’s overcurrent feature will trip the drive should current rise
above 200%.
Current Limit Setting
200%
0
Drive Output Current
➊ % of Drive Overcurrent
➋ Drive Output Frequency Decel Ramp
➌ Parameter 46 = 0.5 Seconds
➍ Parameter 46 = 1.0 Seconds
➎ Parameter 46 = 1.5 Seconds
➏ Parameter 46 = 0.0 Seconds
O
V
E
R
C
U
R
R
E
N
T
140%
Time
➏ Drive Trips at 200%
Drive
Operating
Range Drive
Operating
Range Drive
Operating
Range
O
V
E
R
C
U
R
R
E
N
T
O
V
E
R
C
U
R
R
E
N
T
Drive
Operating
Range
➌
➊
➋
➎ ➍
➊
➋
➊
➋