2.
3.
4.
5.
Parameter 1-98
Parameter 1-99
[0]=5 Hz
[0]=40%
[1]=15 Hz
[1]=80%
[2]=25 Hz
[2]=100%
[3]=50 Hz
[3]=100%
Use the 4 current points [A] from the motor nameplate.
Calculate the values as a percentage of nominal motor current and enter it into the array.
I
x
x
100
I
m
,
n
%
Program all frequency/current limit points from the motor nameplate or motor data sheet.
Enter frequency settings for
parameter 1-98 ATEX ETR interpol. points freq.
in Hz, not RPM.
4.3 Parameter Set-up
4.3.1 Alarm Handling
N O T I C E
Ensure that the digital input set to
[80] PTC Card 1
is not also connected as a thermistor resource (motor overload protection) in
parameter 1-93 Thermistor Resource
.
Configure the digital input in
parameter group 5-1* Digital Inputs
.
Digital input function
Select
Terminal
No operation
[0]
All terminals 32, 33
Reset
[1]
All
...
PTC Card 1
[80]
All
...
All digital inputs can be set to
[80] PTC Card 1
. However, only 1 digital input can have this selection.
4.4 Parameter Set-up for Ex eb and Ex ec Motors
N O T I C E
Do not use the ATEX ETR Monitor function with an Ex db motor by setting
Parameter 1–90 Motor Thermal Protection
to a different
value than
[20] ATEX ETR
. This automatically disables the ATEX ETR specific parameters from
parameter 1–94 ATEX ETR cur.lim.
speed reduction
to
parameter 1-99 ATEX ETR interpol points current
.
4.4.1 Overview of Ex eb and Ex ec Specific Parameters
Parameter
Setting
Parameter 1–90 Motor Thermal Protection
[20] ATEX ETR
Parameter 1–94 ATEX ETR cur.lim. speed reduction
20%
Parameter 1–98 ATEX ETR interpol. points freq.
Motor nameplate
AQ267038105120en-000101 / 130R0104
20 | Danfoss A/S © 2022.08
Commissioning
VLT® PTC Thermistor Card MCB 112
Operating Guide
