Motor Temperature - Danfoss VLT HVAC Drive FC 131 Programming Manual

Programming Guide | VLT® HVAC Drive FC 131

1-9* Motor Temperature

4.3.11
Parameters for configuring the temperature protection features for the motor.
1-90 Motor Thermal Protection
Default value: [4] ETR trip 1
Setup: All setups
Data type:
Uint8
Motor thermal protection can be implemented via a PTC sensor in the motor windings connected to 1 of the analog or digital inputs
(parameter 1-93 Thermistor Source), or via calculation (ETR = Electronic Thermal Relay) of the thermal load, based on the actual load
and time. The calculated thermal load is compared with the rated motor current I
activate an overheat warning or alarm.
ETR calculation is based on motor data from parameter group 1-2* Motor Data.
Option Name
[0] No protection
[1] Thermistor warning
[2] Thermistor trip
[3] ETR warning 1
[4]* ETR trip 1
[22] ETR Trip – Extended Detection
1-93 Thermistor Source
Default value: [0] None
Setup: All setups
Data type: Uint8
Set the digital input to [0] PNP - Active at 24 V in parameter 5-03 Digital Input 29 Mode.
Danfoss A/S © 2024.11
Parameter type:
Conversion index:
Change during operation:
and the rated motor frequency f
M, N
NOTICE
Description
Disable temperature monitoring.
A thermistor gives a warning if the upper limit of the motor
temperature range is exceeded.
If the upper limit of the motor temperature range is exceeded, a
thermistor gives an alarm and makes the drive trip.
If the calculated upper limit of the motor temperature range is
exceeded, a warning occurs.
Start motor thermal calculation based on actual load and time as
well as motor frequency only when the motor current is above
110% of the nominal motor current.
Start motor thermal calculation based on actual load and time as
well as motor frequency when the motor current is above 110%
of the nominal motor current. Another situation is to start motor
thermal calculation when the motor current is less than 110% of
the nominal motor current and trigger current limit.
Parameter type:
Conversion index:
Change during operation:
NOTICE
Parameter Descriptions
Option
–
True
. It is possible to
M, N
Option
–
False
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