Selec VFD Series

1, 2, and 3: The Non-linear curves are usually used in pump and
centrifugal applications and help in improving the energy efficiency of the system.
4: Multipoint V/f offers the user the option of entering a custom V/f curve using the rated Voltage and
Frequency values and the user settable intermediate points in parameters P4-01 to P4-06.
0: General V/f traces a linear relationship between the output voltage and frequency. It is used
generally for constant load applications
V rated
OP Voltage
Linear
1.5 Power
1.7 Power
2.0 Power
Frequency
F rated
37
User Manual
P4-01
V/F Intermediate
Frequency 1 (F1)
0.0 Hz – F2 (P4-03)
Default : 1.0 Hz
P4-02
V/F Intermediate
Voltage 1
0 - Rated Voltage (P3-01)
Default : 5 V
P4-03
V/F Intermediate
Frequency 2(F2)
F1 (P4-01) – F3 (P4-05)
Default : 5.0 Hz
P4-04
V/F Intermediate
Voltage 2
0 - Rated Voltage (P3-01)
Default : 25 V
P4-05
V/F Intermediate
Frequency 3(F3)
F2 (P4-03) - Rated
Frequency (P3-00)
Default : 25.0 Hz
P4-06
V/F Intermediate
Voltage 3
0 - Rated Voltage (P3-01)
Default : 115 V
These parameters are used to provide the user with the option of a customizable V/f curve that will
best suit their application. These parameters are used only when P4-00 is set to 4 i.e. Multipoint V/f.