V/F Current Limitation [26] - WEG CFW-11 Programming Manual

The function is activated with P0202=2 (Adjustable V/f).
The factory setting of P0144 (8.0 %) is adequate for standard motors with rated frequency of 60 Hz. When using
a motor with rated frequency (adjusted in P0403) different from 60 Hz, the default value for P0144 may become
inadequate, being able to cause difficulties in the motor starting. A good approximation for the setting of P0144 is
given by the formula:
If it is necessary to increase the starting torque, increase gradually the value of P0144.
Output
Voltage
100 %
P0142
P0143
P0144

9.3 V/f CURRENT LIMITATION [26]

P0135 – Maximum Output Current
Adjustable 0.2 to 2xI
Range:
Properties: V/f and VVW
Access groups 01 PARAMETER GROUPS
via HMI:
P0344 – Current Limitation Configuration
Adjustable 0=Hold -FL ON
Range: 1=Decel. -FL ON
2=Hold -FL OFF
3=Decel. -FL OFF
Properties: V/f, CFG and VVW
Access groups 01 PARAMETER GROUPS
via HMI:
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P0144 =
Line rated voltage
0.1 Hz 3 Hz
P0146
Figure 9.8 - V/f curve in function of P0142 to P0146
nom-HD
26 V/f Current Limit
26 V/f Current Limit
3
x P0142
P0403
Speed/Frequency
P0134
P0145
Scalar Control (V/f)
P0202=2
Factory 1.5xI
nom-HD
Setting:
Factory 1
Setting:
9
9-7