Etr; Atex Etr; Kty Type Selection; Etr Profile - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions
4500
4000
3500
3 3
3000
2500
2000
1500
1000
500
0
-25
Illustration 3.15 KTY Type Selection
KTY Sensor 1: 1 kΩ at 100 °C (212 °F) (for example Philips
KTY 84-1)
KTY Sensor 2: 1 kΩ at 25 °C (77 °F) (for example Philips
KTY 83-1)
KTY Sensor 3: 2 kΩ at 25 °C (77 °F) (for example Infineon
KTY-10)
NOTICE
If the temperature of the motor is utilized through a
thermistor or KTY sensor, the PELV is not complied with
if there are short circuits between motor windings and
the sensor. Put extra isolation on the sensor to comply
with PELV.
64
VLT
0 25 50 75 100
Temperature [°C]
KTY type 1 KTY type 2
Danfoss A/S © 10/2018 All rights reserved.
®
AutomationDrive FC 301/302

3.2.16 ETR

The calculations estimate the need for a lower load at
lower speed due to less cooling from the fan incorporated
in the motor.
t [s]
2000
1000
600
500
400
300
200
100
60
125 150
50
40
KTY type 3
30
20
10
Illustration 3.16 ETR Profile

3.2.17 ATEX ETR

®
The VLT
approved monitoring of motor temperature. Alternatively,
an external ATEX-approved PTC protection device can be
used.
NOTICE
Only use ATEX Ex-e-approved motors for this function.
See the motor nameplate, approval certificate, datasheet,
or contact motor supplier.
When controlling an Ex-e motor with increased safety, it is
important to ensure certain limitations. The parameters
that must be programmed are presented in Table 3.9.
1.0 1.2 1.4 1.6 1.8 2.0
PTC Thermistor Card MCB 112 offers ATEX-
f OUT = 1 x f M,N (par. 1-23)
f OUT = 2 x f M,N
f OUT = 0. 2 x f M,N
I
M
I (par. 1-24)
MN
MG33MP02