Motor Temperature - Danfoss VLT AutomationDrive FC 301 Programming Manual

VLT AutomationDrive FC 301/302
Programming Guide
Parameter 1-89 Stop Func Torque Ramp Time
Table 135: Parameter 1-89 Stop Func Torque Ramp Time
1-89 Stop Func Torque Ramp Time
Default value: 0.01 s
Conversion index: -2
Configure the time in seconds during which the torque is ramped to 0, after the motor speed is ramped down to the minimum
speed as specified in parameter 1-81 Min Speed for Function at Stop [RPM].

5.2.10 1-9* Motor Temperature

The following parameters are only available in FC 302:
-
Parameter 1-94 ATEX ETR Cur.Lim. Speed Reduction
-
Parameter 1-95 Thermistor Sensor Type
-
Parameter 1-96 Thermistor Sensor Resource
-
Parameter 1-98 ATEX ETR Interpol. Points Freq.
-
Parameter 1-99 ATEX ETR Interpol. Points Current
Parameter 1-90 Motor Thermal Protection
Table 136: Parameter 1-90 Motor Thermal Protection
1-90 Motor Thermal Protection
Default value: [0] No protection
Conversion index: –
Motor thermal protection can be implemented using a range of techniques:
• Via a PTC sensor in the motor windings connected to 1 of the analog or digital inputs (parameter 1-93 Thermistor Resource). See
the chapter PTC Thermistor Connection.
• Via a KTY sensor in the motor winding connected to an analog input (parameter 1-96 Thermistor Sensor Resource). See the chap-
ter KTY Sensor Connection.
• 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
• Via a mechanical thermal switch (Klixon type). See the chapter Klixon.
For the North American market: The ETR functions provide class 20 motor overload protection in accordance with NEC.
Option Name
[0]* No protection
[1] Thermistor warning
[2] Thermistor trip
[3] ETR warning 1
102 | Danfoss A/S © 2022.12
Parameter type: Range, 0.01 - 3600.00 s
Data type: Uint32
N O T I C E
Parameter type: Option
Data type: Uint8
and the rated motor frequency f
M,N
Description
Continuously overloaded motor when no warning or trip of the drive is required.
Activates a warning when the connected thermistor or KTY sensor in the motor reacts in the
event of motor overtemperature.
Stops (trips) the drive when connected thermistor or KTY sensor in the motor reacts in the event
of motor overtemperature. The thermistor cutout value must be more than 3 kΩ. Integrate a
thermistor (PTC sensor) in the motor for winding protection.
Calculates the load when setup 1 is active and activates a warning on the display when the mo-
tor is overloaded. Program a warning signal via 1 of the digital outputs.
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
. See the chapter ETR.
M,N
AU275636650261en-000101 / 130R0334