ACD320 user manual Parameter Description
- 93-
Fig.6-21 Motor Overload Protection Current
The value can be determined by following equation:
Motor overload protection current = (maximum current/rated current)
×
100%
It is mainly applied to the cases that big inverter drives small motor, requiring to correctly
set up this function to protect the motor.
Function Code Name Setting Range
Default
Value
F5.02
Power-down
Frequency Drop Point
70.0～110.0%(standard bus
voltage)
80.0%
F5.03
Instant power-down
Frequency drop rate
0.00Hz～F0.04 0.00Hz
If the instant power-down drop rate is set to be 0, the instant power-down restart function is
invalid.
Instant power-down frequency drop point: it is indicting when the bus voltage, after the
power network is down and drops to the instant power-down frequency drop point, the inverter
starts to decrease the operation frequency based on the instant power-down frequency drop rate,
enabling the motor to generate electricity which is fed back to keep the bus voltage, and thus
ensuring the inverter is operating normally till inverter power is on again.
Important: Adjusting these two parameters properly canmagnificently achieve the power
network switching instead of causing inverter protection and thus causing production shutdown.
Function Code Name Setting Range
Default
Value
F5.04
Over-voltage Stall
Protection
0: prohibit
1: allow
80.0%
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