1-90 Motor Thermal Protection
Option:
Function:
[2]
Thermistor
trip
Stops (trips) the frequency converter when the
connected thermistor or KTY sensor in the
motor reacts if motor overtemperature occurs.
The thermistor cutout value must be more
than 3 k
Ω
.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
[3]
ETR
warning 1
Calculates the load when set-up 1 is active
and activates a warning on the display when
the motor is overloaded. Program a warning
signal via 1 of the digital outputs.
[4]
ETR trip 1
Calculates the load when set-up 1 is active
and stops (trips) the frequency converter
when the motor is overloaded. Program a
warning signal via 1 of the digital outputs. The
signal appears if there is a warning and if the
frequency converter trips (thermal warning).
[5]
ETR
warning 2
[6]
ETR trip 2
[7]
ETR
warning 3
[8]
ETR trip 3
[9]
ETR
warning 4
[10] ETR trip 4
[20] ATEX ETR
Activates the thermal monitoring function for
Ex-e motors for ATEX. Enables
parameter 1-94 ATEX ETR cur.lim. speed
reduction
,
parameter 1-98 ATEX ETR interpol.
points freq.
, and
parameter 1-99 ATEX ETR
interpol points current
.
NOTICE
If
[20] ATEX ETR
is selected, follow the instructions in the
dedicated chapter of the
design guide
and the
instructions provided by the motor manufacturer.
NOTICE
If
[20] ATEX ETR
is selected, set
to 150%.
3.3.15 PTC Thermistor Connection
1330
550
250
-20 °C
175HA183.11
4000
3000
R
(Ω)
nominal
nominal -5 °C
nominal +5 °C
[°C]
Illustration 3.12 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
.
PTC / Thermistor
R
OFF
ON
<800 Ω
+10V
130BA152.10
>2.7 kΩ
12 13
18
37
32
27
19
29
33 20
55
50
39 42
53 54
Illustration 3.13 PTC Thermistor Connection - Digital Input
Parameter Description
Programming Guide
MG20OB02
Danfoss A/S © 05/2018 All rights reserved.
59
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Summary of Contents for VLT AQUA Drive FC 202
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