Motor Temperature - Danfoss VLT AutomationDrive EZ FC 321 Programming Manual

VLT® AutomationDrive EZ FC 321
Programming Guide
Not used for selections [0] Precise ramp stop, [1] Cnt stop with reset, and [2] Cnt stop w/o reset in parameter 1-83 Precise Stop Func-
tion.
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].

4.2.10 1-9* Motor Temperature

Parameter 1-90 Motor Thermal Protection
Table 136: Parameter 1-90 Motor Thermal Protection
1-90 Motor Thermal Protection
Default value: Size related
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
chapter 3.2.13 PTC Thermistor Connection.
• Via a KTY sensor in the motor winding connected to an analog input (parameter 1-96 Thermistor Sensor Resource). See chapter
3.2.14 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 chapter 3.2.17 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
[4] ETR trip 1
[5] ETR warning 2
[6] ETR trip 2
[7] ETR warning 3
Danfoss A/S © 2021.08
N O T I C E
Parameter type: Range, 0.01 - 3600.00 s
Data type: Uint32
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.
Calculates the load when set-up 1 is active and stops (trips) the drive when the motor is overloa-
ded. Program a warning signal via 1 of the digital outputs. The signal appears in the event of a
warning and if the drive trips (thermal warning).
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
. See chapter 3.2.15 ETR.
M,N
AU373327181955en-000101 / 130R1208 | 89