Danfoss VLT AutomationDrive FC 360 Programming Manual page 46

Parameter Descriptions
4.2.10 1-9* Motor Temperature
Parameters for adjusting temperature protection settings
for the motor.
1-90 Motor Thermal Protection
Option:
[0] No
*
4 4
protection
[1] Thermistor
warning
[2] Thermistor
trip
[3] ETR warning
1
[4] ETR trip 1
[22] ETR Trip -
Extended
Detection
44
®
VLT
Function:
Continuously overloaded motor, when no
warning or trip of the frequency converter is
required.
Activates a warning when the connected
thermistor in the motor reacts to a motor
overtemperature.
Stops (trips) the frequency converter when
the connected thermistor in the motor reacts
to a motor overtemperature.
The thermistor cutout value must be >3 kΩ.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
Calculates the load and activates a warning in
the display when the motor is overloaded.
Program a warning signal via 1 of the digital
outputs.
Calculates the load and stops (trips) the
frequency converter when the motor is
overloaded. Program a warning signal via 1 of
the digital outputs. The signal appears in the
event of a warning and if the frequency
converter trips (thermal warning). Once the
MOTOR ETR OVER alarm is reported, it can
reset immediately.
Calculates the load and stops (trips) the
frequency converter when the motor is
overloaded. Program a warning signal via 1 of
the digital outputs. The signal appears in the
event of a warning and if the frequency
converter trips (thermal warning). Once the
MOTOR ETR OVER alarm is reported, it can
only reset after parameter 16-18 Motor
Thermal decreases to 0.
Danfoss A/S © 06/2017 All rights reserved.
AutomationDrive FC 360
R
(Ω)
4000
3000
1330
550
250
-20 °C
Illustration 4.4 PTC Profile
Using a digital input and 10 V as supply:
Example: The frequency converter trips when the motor
temperature is too high.
Parameter set-up:
•
Set parameter 1-90 Motor Thermal Protection to [2]
Thermistor Trip.
•
Set parameter 1-93 Thermistor Source to [6] Digital
Input 33.
42 53 54 50
37 38 12 13 18
PTC / Thermistor
Illustration 4.5 PTC Thermistor Connection - Digital Input
Using an analog input and 10 V as supply:
Example: The frequency converter trips when the motor
temperature is too high.
Parameter set-up:
•
Set parameter 1-90 Motor Thermal Protection to [2]
Thermistor Trip.
•
Set parameter 1-93 Thermistor Source to [2] Analog
Input 54.
 nominal -5 °C  nominal +5 °C
 nominal
55
OFF
19 27 29 31 32 33
ON
<800 Ω
 [°C]
R
>2.9 kΩ
MG06C702