0
500
1000
1500
2000
2500
3000
3500
4000
4500
-25
0
25
50
75
100
125
150
Temperature [°C]
R
es
is
ta
nc
e
[O
hm
]
KTY type 1
KTY type 2
KTY type 3
130BB917.10
Illustration 3.15 KTY Type Selection
KTY Sensor 1: 1 k
Ω
at 100
°
C (212
°
F) (for example Philips
KTY 84-1)
KTY Sensor 2: 1 k
Ω
at 25
°
C (77
°
F) (for example Philips
KTY 83-1)
KTY Sensor 3: 2 k
Ω
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.
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.
1.2
1.0
1.4
30
10
20
100
60
40
50
1.8
1.6
2.0
2000
500
200
400
300
1000
600
t [s]
175ZA052.12
fOUT = 2 x f M,N
fOUT = 0.2 x f M,N
fOUT = 1 x f M,N(par. 1-23)
I
MN
(par. 1-24)
I
M
Illustration 3.16 ETR Profile
3.2.17 ATEX ETR
The VLT
®
PTC Thermistor Card MCB 112 offers ATEX-
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
Parameter Descriptions
VLT
®
AutomationDrive FC 301/302
64
Danfoss A/S © 10/2018 All rights reserved.
MG33MP02
3
3
Summary of Contents for VLT AutomationDrive FC 302
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