ABB ACS850 - Page 149

Parameters 149
31.10 Mot load curve Defines the load curve together with parameters 31.11 Zero
speed load and 31.12 Break point
When the parameter is set to 100%, the maximum load is
equal to the value of parameter 99.06 Mot nom current
(higher loads heat up the motor). The load curve level should
be adjusted if the ambient temperature differs from the
nominal value.
The load curve is used by the motor thermal protection model
when parameter 31.02 Mot temp1 src is set to Estimated.
50 … 150% Maximum load for the motor load curve. 1 = 1%
31.11 Zero speed load Defines the motor load curve together with parameters 31.10
Mot load curve and 31.12 Break point. Defines the maximum
motor load at zero speed of the load curve. A higher value
can be used if the motor has an external motor fan to boost
the cooling. See the motor manufacturer's recommendations.
See parameter 31.10 Mot load curve.
50 … 150% Zero speed load for the motor load curve. 1 = 1%
31.12 Break point Defines the motor load curve together with parameters 31.10
Mot load curve and 31.11 Zero speed load. Defines the break
point frequency of the load curve i.e. the point at which the
motor load curve begins to decrease from the value of
parameter 31.10 Mot load curve towards the value of
parameter 31.11 Zero speed load.
See parameter 31.10 Mot load curve.
0.01 … 500.00 Hz Break point for the motor load curve. 100 = 1 Hz
No. Name/Value Description FbEq
50
100
150
31.10
31.12
31.11
I/I
N
(%)
I = Motor current
I
N
= Nominal motor current
Drive output
frequency