Parameter Description MD280/MD280N User Manual
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Motor Overload Protection
Gain Coefficient
Rated Curre
Time
60 min
1 min
Motor Overload Protection
Gain Coefficient
Rated Curre
Time
60 min
1 min
Fig6- 25 Schematic Diagram for inverse time-lag curve of overload protection on motor
Motor overload
prealarm coefficient
Factory default
value
80%
FB-02
Setup range 50% to 100%
When the motor overload detection level reaches this parameter setup
value, the multifunctional output terminal DO or fault relay (RELAY) will
output motor overload prealarm signal. This parameter is calculated
according to the percentage of time for continuous running under certain
overload point rather than the overload fault time percentage.
For example, the motor overload protection gain is set to 1, the motor
overload prealarm coefficient is set to 80%, when the motor keeps running
for 48 seconds (80%×one minute) under 220% of rated current, the
multifunctional output terminal DO or fault relay (RELAY) will output motor
overload prealarm signal.
Ovter voltage stall gain
Factory
default value
0
FB-03
Setup range 0 to 100
Over voltage stall protection
voltage
Factory
default
value
130%
FB-04
Setup range 120% to 150%
Over-voltage stall gain: It adjusts the inverter’s capacity in suppressing the
current stall. The bigger the value is, the stronger the capacity is. 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 large inertia, the
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