8000m Series
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This parameter can be determined by the following formula:
Motor over load protection=(Allowed maximum load current/VFD rated
current)*100%.
In the case of big VFD driving smaller motor, it is needed to set a correct value to
this parameter for the protection of the motor.
FA.02
Threshold for frequency
reducing at instantaneous power
failure
Factory Setting 80.00%
Setting Options 70.0%~110.0% (standard bus voltage)
FA.03
Frequency reducing rate at
instantaneous power failure
Factory Setting 0.00Hz
Setting Options 0.00Hz~F0.10
When frequency reducing rate at instantaneous power failure is set as 0, the
function of frequency reducing at instantaneous power failure is disabled.
Threshold for frequency reducing at instantaneous power failure: it refers to the
point of voltage which will be reached as the bus voltage dropping after an
instantaneous power failure, at that point VFD start to decrease the output
frequency in the frequency reducing rate (FA.03) to let the motor working in
generating state and keeping the bus voltage by the regenerating power, ensuring
the operation of VFD until power on again.
Note: Adjusting these two parameters to prevent down time of product line as VFD
tripping caused by power grid switching.
FA.04
Over-voltage stalling
protection
Factory Setting 0
Setting Options
0 Disabled
1 Enabled
FA.05
Over-voltage stalling
protection point
Factory Setting 120%
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