57
Figure 5-2 Schematic diagram of motor overload protection coefficient setting
The motor overload protection coefficient can be determined by the following formula:
Overload protection coefficient of motor = maximum allowable load current/rated output current of inverter × 100%
Generally, the maximum load current refers to the rated current of the load motor. Adjustment of protection value in line.
05.02
Undervoltage protection level
220V
：
50
～
280V
180V
380V
：
50
～
480V
360V
Model setting
This function code specifies the allowable lower limit voltage of the DC bus when the inverter is working normally.
When the grid voltage is too low, the output torque of the motor will drop. For constant power loads and constant torque loads, too low grid voltage will increase the
input and output current of the inverter, thereby reducing the reliability of the inverter's operation. Therefore, when running for a long time under low grid voltage, the
inverter power needs to be derated for use.
05.03
Voltage limiting factor during deceleration
0
：
0FF
，
1
～
255
1
This parameter is used to adjust the ability of the inverter to suppress overvoltage during deceleration.
05.04
Overvoltage limit level
220V
：
350
～
400V
375V
380V
：
660
～
850V
700V
Model setting
The overvoltage limit level defines the operating voltage of the voltage stall protection.
05.05
Current limiting coefficient during acceleration
0
：
OFF
，
1
～
99
10
This parameter is used to adjust the inverter's ability to suppress overcurrent during acceleration. During acceleration, the greater the value, the stronger the ability
to suppress overcurrent.
05.06
Current limiting coefficient during constant speed
0
：
OFF
，
1
～
99
0
This parameter is used to adjust the ability of inverter to restrain overcurrent in the process of constant speed.