KE300A Inverter Parameter Description
128
Group P9 Fault and Protection
P9-00
Motor overload protection selection
Factory default
1
Setting range
0
Invalid
1
Valid
P9-01
Motor overload protection gain
Factory default
1.00
Setting range
0.20 ~ 10.00
P9-00=0: Has no motor overload protection function, may cause the motor overheating damaged.
P9-00=1: The inverter judges whether the motor is overload or not according to the inverse time limit curve
of motor overload protection.
The inverse time limit curve of motor overload protection: 220% * (P9-01) * motor rated current, lasts for
one second, the overload fault would be reported; 150% * (P9-01) * motor rated current, lasts for 60
seconds, the overload fault would be reported.
Please set P9-01 according to the motor overload ability. If the parameter is too big, the motor will over
heat damage without alarming.
P9-02
Motor overload pre-warning coefficient
Factory default
80%
Setting range
50% ~ 100%
For safe consideration, there is a pre-warning signal sent to the control system via DO before the motor
overload fault protection, the pre-warning coefficient is used to confirm the extent of pre-warning before the
motor overload protection. The bigger the parameter is, the smaller the pre-warning lead is.
After the accumulated output current is bigger than (P9-02)*overload inverse time limit curve, DO outputs
“motor overload pre-warning” ON signal.
P9-03
Over-voltage stall gain
Factory default
0
Setting range
0 (No over voltage stall) ~ 100
P9-04
Over-voltage stall protection voltage
Factory default
130%
Setting range
120% ~ 150% (three phase)
During deceleration, after DC bus voltage exceeds over-voltage stall protection voltage, the inverter stops
deceleration & runs with the current frequency, continue decelerating after bus voltage drops.
Over-voltage stall gain is used to adjust the suppression over-voltage capacity during deceleration. The
bigger this value is, the stronger the capacity is. Under the precondition of no over-voltage, please set the
gain as small as possible.
For the load with small inertia, the value should be small. Otherwise, the dynamic response of the system
will be slow. For the load with big inertia, the value should be big. Otherwise, the suppression result will be
poor, and over voltage fault may occur.
When the value is 0, the over voltage stall function is invalid.
P9-05
Over-current stall gain
Factory default
20
Setting range
0 ~ 100
P9-06
Over-current stall protection current
Factory default
160%
Setting range
100% ~ 200%
