Selec VFD Series

P9-23
Overcurrent prealarm
detection time
0.1 to 999.9 s
Default :
0.1 s
The overcurrent protection feature works by allowing the user to set the maximum current that the
drive will source to the motor. This protects the motor windings from damage due to excessive
current flow. The timings and prealarm functions operate just like other protection parameters.
P9-18
Overcurrent
protection enable
0: Disabled
1: Enabled
Default : 1
P9-19
P9-20
P9-21
P9-22
Critical value of
Overcurrent protection
Overcurrent trip
time
Overcurrent prealarm
enable
Overcurrent prealarm
detection level
100 to 180 %
0.1 to 999.9 s
0: Disabled
1: Enabled
100 to P9-19
Default :
120 %
Default :
0.1 s
Default : 0
Default :
105 %
53
User Manual
P9-24
Undercurrent
protection enable
0: Disabled
1: Enabled
Default : 0
P9-25
Critical value of
Undercurrent protection
20 % to 90 %
Default :
25 %
P9-26
Undercurrent trip
time
0.1 to 999.9 s
Default :
0.1 s
P9-27
P9-28
Undercurrent prealarm
enable
Undercurrent prealarm
detection level
0: Disabled
1: Enabled
P9-25 to 90 %
Default : 0
Default :
50 %
P9-29
Undercurrent prealarm
detection time
0.1 to 999.9 s
Default :
0.1 s
Undercurrent protection is usually used to prevent motor damage when operating certain pumps and
similar applications. Please note that this feature is disabled by default.
P9-30
Automatic Current
Limit
0: Disabled
1: Enabled
Default : 0
P9-31
Automatic Current
Limit Level
50 – 180 %
Default :
150 %
In cases where the motor acceleration has been set as too high, there is a possibility of the drive
facing overcurrent faults. The automatic current limit feature helps mitigate those conditions by
holding the speed of the motor till the current value becomes lesser than the threshold value. This
feature is usually useful in cases where the starting load may not be constant and the user wants to
extract the fastest acceleration.