Etr; Atex Etr - Danfoss VLT AutomationDrive FC 301 Programming Manual

VLT AutomationDrive FC 301/302
Programming Guide
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-25 0 25
KTY Type 1
Illustration 42: 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)
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.

5.2.10.3 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]
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1.0 1.2 1.4
Illustration 43: ETR Profile

5.2.10.4 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.
Danfoss A/S © 2022.12
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Temperature [°C]
KTY Type 2 KTY Type 3
N O T I C E
f = 2 x f
OUT
f = 1 x f
OUT
f = 0.2 x f
OUT
I
M
I (parameter 1-24)
1.6 1.8 2.0
M,N
(parameter 1-23)
M,N
M,N
M,N
Parameter Descriptions
AU275636650261en-000101 / 130R0334 | 109