Danfoss VLT AQUA Drive FC 202 Programming Manual page 63

Parameter Description
NOTICE
Compare the minimum switching frequency requirement
stated by the motor manufacturer to the minimum
switching frequency of the frequency converter, the
default value in parameter 14-01 Switching Frequency. If
the frequency converter does not meet this requirement,
use a sine-wave filter.
More information about ATEX ETR thermal monitoring can
be found in Application Note for FC 300 ATEX ETR Thermal
Monitoring Function.
MG20OB02
Programming Guide
3.3.18 Klixon
The Klixon type thermal circuit breaker uses a KLIXON
metal dish. At a predetermined overload, the heat caused
by the current through the disc causes a trip.
Using a digital input and 24 V as supply:
Example: The frequency converter trips when the motor
temperature is too high.
Parameter set-up:
•
•
12 13 18
PTC / Thermistor
Illustration 3.16 Thermistor Connection
1-91 Motor External Fan
Option:
[0] No
*
[1] Yes Applies an external motor fan (external ventilation), so
1-93 Thermistor Source
Option:
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Set parameter 1-90 Motor Thermal Protection to [2]
Thermistor Trip.
Set parameter 1-93 Thermistor Source to [6] Digital
Input.
OFF
19 27 29 32 33 20 37
ON
<6.6 k Ω >10.8 k Ω
Function:
No external fan is required, that is the motor is
derated at low speed.
no derating of the motor is required at low speed. The
upper curve in Illustration 3.15 (f
followed if the motor current is lower than nominal
motor current (see parameter 1-24 Motor Current). If
the motor current exceeds nominal current, the
operation time still decreases as if no fan was
installed.
Function:
NOTICE
This parameter cannot be adjusted
while the motor is running.
NOTICE
Set digital input to [0] PNP - Active at
24 V in parameter 5-00 Digital I/O Mode.
Select the input to which the thermistor (PTC
sensor) should be connected. An analog
input option [1] Analog Input 53 or [2] Analog
Input 54 cannot be selected if the analog
input is already in use as a reference source
®
3
R
= 1 x f ) is
out M,N
61
3