ABB ACQ80-04 Firmware Manual page 45

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%.
Note: The motor thermal model can be used when only one motor is connected to
the inverter.
Insulation
WARNING! IEC 60664 requires double or reinforced insulation between live
parts and the surface of accessible parts of electrical equipment which are
either non-conductive or conductive but not connected to the protective earth.
To fulfil this requirement, connect a thermistor to the drive's control terminals using
any of these alternatives:
• Separate the thermistor from live parts of the motor with double reinforced
insulation.
• Protect all circuits connected to the drive's digital and analog inputs. Protect
against contact, and insulate from other low voltage circuits with basic insulation
(rated for the same voltage level as the drive's main circuit).
Use an external thermistor relay. The relay insulation must be rated for the same
voltage level as the drive's main circuit
Temperature monitoring using thermistor relays
A normally closed or a normally open thermistor relay can be connected to digital
input DI6.
See section Insulation
Thermistor
relay
T
Motor
on page 45.
Control board
DI6
+24 V DC
Program features 45