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
.
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:
•
Set
parameter 1-90 Motor Thermal Protection
to
[2]
Thermistor Trip
.
•
Set
parameter 1-93 Thermistor Source
to
[6] Digital
Input
.
PTC / Thermistor
OFF
ON
+24V
12 13 18
37
32
A
27
19
29
33
B
20
GND
R
<6.6 k Ω >10.8 k Ω
130BA151.11
Illustration 3.16 Thermistor Connection
1-91 Motor External Fan
Option: Function:
[0]
*
No No external fan is required, that is the motor is
derated at low speed.
[1]
Yes Applies an external motor fan (external ventilation), so
no derating of the motor is required at low speed. The
upper curve in
(f
out
= 1 x f
M,N
) is
followed if the motor current is lower than nominal
motor current (see
). If
the motor current exceeds nominal current, the
operation time still decreases as if no fan was
installed.
1-93 Thermistor Source
Option:
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
Parameter Description
Programming Guide
MG20OB02
Danfoss A/S © 05/2018 All rights reserved.
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Содержание VLT AQUA Drive FC 202
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