Description Of Specific Functions 189
V260 Series High Performance Closed-Loop Vector Inverter User Manual
FF.2.35 Under voltage
protection action level
Setting range: 320~450V
Factory default: 400V
This parameter sets the allowable lower limiting voltage at the DC side during normal operation of the
inverter. For some occasions with lower power grid, it is applicable to appropriately reduce the under voltage
protection level, so as to ensure normal operation of the inverter.
The set value for this parameter [
FF.2.35
] must be no more than the under voltage adjustment action level
[
F1.4.45
].
Figure 7-69-A AI2 zero offset
correction curve
Figure 7-69-B AI2 gain
correction curve
Figure 7-70-A AI3 zero offset
correction curve
Figure 7-70-B AI3 gain correction curve
¾
When the power grid is under excessive low voltage, the output torque of the motor
will decrease. In the occasion of constant power load and constant torque load,
excessive low voltage of the power grid will lead to increase of the inverter
’
s input
current, hence reducing the reliability of inverter operation.
