
Program features 91
Note
: The motor thermal model can be used when only one motor is connected to the
drive.
Motor thermal protection model
The drive calculates the temperature of the motor on the basis of the following
assumptions:
1. When power is applied to the drive for the first time, the motor is assumed to be at
ambient temperature (defined by parameter
).
After this, when power is applied to the drive, the motor is assumed to be at the
estimated temperature.
2. Motor temperature is calculated using the user-adjustable motor thermal time and
motor load curve. The load curve should be adjusted in case the ambient
temperature exceeds 30 °C.
Note:
The motor thermal model can be used when only one motor is connected to
the inverter.
Sensor insulation and connection
AI1
GND
One sensor
AO
GND
AI1
GND
AO
GND
Three sensors
Motor
3.3 nF
Motor
3.3 nF
One sensor
Three sensors
T
AO
GND
AI1
GND
T
T
T
AO
GND
AI1
GND
ACS180 FW.book Page 91 Tuesday, March 9, 2021 2:25 PM