Danfoss VLT AutomationDrive FC 361 Programming Guide

4.2.10 PTC Thermistor Connection
1330
550
250
-20 °C
175HA183.11
4000
3000
R
(Ω)
 nominal
 nominal -5 °C  nominal +5 °C
 [°C]
Illustration 4.9 PTC Prole
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.
+ 10V
39 42 50 53 54 55
12 13 18 19 27 29 32 33 20
PTC / Thermistor
OFF
ON
R
<800
>2.7 k
e30bg754.10
Illustration 4.10 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.
555039 42 53 54
R
<3.0 k Ω
>3.0 k Ω
+10V
130BA153.11
PTC / Thermistor
OFF
ON
Illustration 4.11 PTC Thermistor Connection - Analog Input
Input
digital/analog
Supply voltage Threshold
cutout values
Digital 10 V
<800 Ω⇒2.7 kΩ
Analog 10 V
<3.0 kΩ⇒3.0 kΩ
Table 4.5 Threshold Cutout Values
NOTICE
Check that the selected supply voltage follows the
specication of the used thermistor element.
4.2.11 ETR
The calculations estimate the need for a lower load at
lower speed due to less cooling from the fan incorporated
in the motor.
1.21.0 1.4
30
10
20
100
60
40
50
1.81.6 2.0
2000
500
200
400
300
1000
600
t [s]
175ZA052.12
f
OUT
= 2 x f
M,N
f
OUT
= 0.2 x f
M,N
f
OUT
= 1 x f
M,N
(par. 1-23)
I
MN
(par. 1-24)
I
M
Illustration 4.12 ETR Prole
4.2.12 Klixon
The Klixon type thermal circuit breaker uses a KLIXON
®
metal dish. At a predetermined overload, the heat caused
by the current through the disc causes a trip.
Using a digital input and 24 V as supply:
Example: The frequency converter trips when the motor
temperature is too high.
Parameter Descriptions Programming Guide
MG06J202 Danfoss A/S © 03/2019 All rights reserved. 47
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Danfoss VLT AutomationDrive FC 361 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361
Category	DC Drives
Language	English