Chapter 5 Function parameter
72
Code
Parameter name
Setting range
Factory
default
Change
protection selection
Ordinary motor (with low
speed compensation)
1
Inverter motor (without
low speed compensation)
2
0: OFF No motor overload protection (be caution), at this time, the inverter has not
overload protection to load motor.
1: Ordinary motor (with low speed compensation) As the cooling effect of ordinary
motor at low speed gets worse, the corresponding electronic thermal protection value
should be adjusted as appropriate, as mentioned here with low compensation, it refers
to lower the overload protection threshold of motor that the running frequency is less
than 30HZ.
2: Inverter motor (without low speed compensation) Because the cooling function of
the inverter dedicated motor is not affected by speed, the low-speed protection
adjustment is not required.
F8.04
Motor overload
protection current
20.0% to 120.0% (rated
motor current)
100.0%
☆
The formula of motor overload protection current:
Motor rated current * F8.04 * 158%, lasts for 10 minutes and then alarms motor
overload;
Motor rated current * F8.04 * 200%, lasts for 1 minutes and then alarms motor
overload;
F8.05
Overvoltage stall
protection
Prohibit
0
0
☆
Allow
1
When the inverter decelerates, due to the effects from load inertia, it may occur that the
actual falling rate of motor speed is lower than the falling rate of output frequency, at
the time the motor will feed back the power to the inverter so that the inverter bus
voltage rises, if no measures are taken, the rising of bus voltage will cause the inverter
overvoltage fault.
F8.06
Overvoltage stall
protection voltage
110 to 150% (220V series)
115%
☆
Overvoltage stall protection voltage refers to that during the operation, the inverter
detects the bus voltage and compares it with the overvoltage stall point defined by
F8.06 (relative to a standard bus voltage), if the bus voltage exceeds the overvoltage
stall point, the inverter's output frequency will stop droping until that the bus voltage is
below detection overvoltage stall point, and then continues to decelerate.
F8.07
Number of automatic
fault reset
0 to 3
0
☆
F8.08
Automatic fault reset
interval setting
0.1 to 100.0s
1.0 s
☆
