Parameters 225
35.50 Motor ambient
temperature
Defines the ambient temperature of the motor for the
motor thermal protection model. The unit is selected by
parameter 96.16 Unit selection.
The motor thermal protection model estimates the motor
temperature on the basis of parameters 35.50 … 35.55.
The motor temperature increases if it operates in the
region above the load curve, and decreases if it operates
in the region below the load curve.
WARNING! The model cannot protect the motor if
the motor does not cool properly because of dust,
dirt, etc.
20 °C or
68 °F
-60…100 °C or
-75 … 212 °F
Ambient temperature. 1 = 1°
35.51 Motor load curve Defines the motor load curve together with parameters
35.52 Zero speed load and 35.53 Break point. The load
curve is used by the motor thermal protection model to
estimate the motor temperature.
When the parameter is set to 100%, the maximum load is
taken as the value of parameter 99.06 Motor nominal
current (higher loads heat up the motor). The load curve
level should be adjusted if the ambient temperature differs
from the nominal value set in 35.50 Motor ambient
temperature.
110%
50…150% Maximum load for the motor load curve. 1 = 1%
35.52 Zero speed load Defines the motor load curve together with parameters
35.51 Motor load curve and 35.53 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 35.51 Motor load curve.
70%
25…150% Zero speed load for the motor load curve. 1 = 1%
No. Name/Value Description Default
FbEq 16
50
100
150
35.51
35.53
35.52
I/I
N
(%)
I = Motor current
I
N
= Nominal motor current
Drive output
frequency
ACS180 FW.book Page 225 Tuesday, March 9, 2021 2:25 PM
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