P9 Failure And Protection - Veikong VFD200A Series Operation Manual

P9 Failure and protection

P9-00 Motor overload protection option
P9-01 Motor overload protection gain
0：The motor overload protective function is disabled. The motor is exposed to potential damage due
to overheating. A thermal relay is suggested to be installed between the inverter and the motor.
1: At this time, the inverter judges whether the motor is overloaded according to the inverse time
curve of the motor overload protection. The shortest time to report motor overload is 2 minutes. If you
need to adjust the motor overload current and time, please set P9-01.
(Be careful to confirm whether the rated current of the motor is correct before setting.) Reduce the
value of P9-01 to make the motor protection advance. The user needs to correctly set the value of P9-01
according to the actual overload capacity of the motor. The motor is overheated and the inverter is not
alarming!
P9-02 Motor overload warning coefficient 50%～100%
This function is used to output an early warning signal to the control system before motor overload
fault protection. This early warning coefficient is used to determine how much early warning is given
before motor overload protection. The larger the value, the smaller the early warning amount. When the
cumulative output current of the inverter is greater than the inverse of the overload inverse time curve and
P9-02, the inverter outputs the "motor overload pre-alarm" ON signal.
P9-03 Overvoltage stall gain
Overvoltage
P9-04
voltage
When the DC bus voltage exceeds the value of P9-04 (Overvoltage stall protective voltage) during
deceleration of the inverter, the inverter stops deceleration and keeps the present running frequency. After
the bus voltage declines, the inverter continues to decelerate. P9-03 (Overvoltage stall gain) is used to
adjust the overvoltage suppression capacity of the inverter. The larger the value is, the greater the
overvoltage suppression capacity will be.
In the prerequisite of no overvoltage occurrence, set P9-03 to a small value. For small-inertia load, the
value should be small. Otherwise, the system dynamic response will be slow. For large-inertia load, the
value should be large. Otherwise, the suppression result will be poor and an overvoltage fault may occur.
If the overvoltage stall gain is set to 0, the overvoltage stall function is disabled. The overvoltage stall
protective voltage setting 100% corresponds to the base values in the following table:
P9-05 Overcurrent stall gain
P9-06 Overcurrent stall protective current 100%–200%
the output
When
acceleration/deceleration of the inverter, the inverter stops acceleration/deceleration and keeps the present
running frequency. After the output current declines, the inverter continues to accelerate/decelerate. P9-05
(Overcurrent stall gain) is used to adjust the overcurrent suppression capacity of the inverter. The larger the
Chapter 6 Parameter Instruction
0：Prohibited
0.20～10.00
0 (no stall overvoltage)–100
stall protective
650V～800V
Voltage Class
Single-phase 220 V
Three-phase 380 V
Three-phase 480 V
0–100
current exceeds
1: allowed
Corresponding Base Value
290 V
530 V
620 V
the overcurrent stall
89
Default：1
Default：1.00
Default：80%
Default：0
Default：760V
Default：20
Default：150%
protective current during