Chapter 5 Parameter Introductions
http://www.acdrive-china.com
180
1 min
Time
Output current
100%
200%
50%
100%
Motor overload
protective
coefficient
Fig. 5-13-1 Motor overload protection curve
◆
Motor overload protection coefficient calculates:
Motor overload protection coefficient
=the max allowed current of load/rated output current of ac drive*100%
Generally, the Max load current is the ac motor rated current. If the motor heat
resistance is better, the value can be increased properly on the basis (for example, 10%).
On the contrary, if the motor has worse heat-resistance, the value should be decreased
some.
Tips:
If the motor rated current does not match that of the ac drive, motor overload protection
can be realized by setting Pd.01. If overload protection happened, the ac drive will
stops PWM output and display OL1 .
Pd.02 Pre-overload detection level
Range: 20.0
～
200.0%
【
160.0%
】
Pd.03 Pre-overload detection time
Range: 0.0
～
60.0s
【
60.0s
】
Note:
◆
Pd.02 defines the current threshold for overload pre-alarm protection. The setting
range is a percentage value of rated current.
◆
Pd.03 defines the time during which the ac drive current exceeds Pd.02. If the
pre-overload status remains after this period, the ac drive will output pre-alarm signal
(OLP2).
◆
Overload pre-alarm take effect means that the ac drive current has exceeded Pd.02 and
the Pre-overload time exceeded Pd.03.
