Selec VFD Series

respectively) has elapsed.
The Overload protection is used to provide a degree of thermal protection to the motor. The pre-
alarm feature can be used to highlight that the system is approaching the critical trip state so that
corrective actions can be taken accordingly. The percentage values specified in the parameters P9-
01 and P9-04 correspond to the percentage of the rated power of the motor as specified in the
parameter P3-03. The delay times act as ON-delay for the trip and prealarm conditions specifying
that the drive will trigger the fault or pre-alarm actions after the time (P9-02 and P9-05
P9-06
Overvoltage
protection enable
0: Disabled
1: Enabled
P9-07
Critical value of OV
protection
100 % to 115 % 110 %
1
P9-08
Overvoltage Trip
time
0.1 to 999.9 s 0.1 s
P9-09
Overvoltage prealarm
enable
0: Disabled
1: Enabled
0
P9-10
Overvoltage prealarm
detection level
100% to Critical value
of OV protection (P9-07)
105 %
P9-11
Overvoltage prealarm
detection time
0.1 to 999.9 s 0.1 s
52
User Manual
The overvoltage protection feature protects the drive from operating in ranges beyond the safe
operating limits. The pre-alarm feature provides an early warning to the user for taking corrective
actions before the drive executes the tripping action.
P9-12
Undervoltage
protection enable
0: Disabled
1: Enabled
1
P9-13
P9-14
P9-15
P9-16
P9-17
Critical value of Under-
voltage protection
Undervoltage trip
time
Undervoltage prealarm
enable
Undervoltage prealarm
detection level
Undervoltage prealarm
detection time
85 % to 100 %
0.1 to 999.9 s
0: Disabled
1: Enabled
P9-13 to 100 %
0.1 to 999.9 s
90 %
0.1 s
0
95 %
0.1 s
Undervoltage protection feature protects the drive from operating in ranges under the safe operating
limits. The prealarm feature provides an early warning to the user for taking corrective actions before
the drive executes the tripping action.