Function
Setting
Parameter 1-90 Motor Thermal
Protection
[20] ATEX ETR
Parameter 1-94 ATEX ETR cur.lim.
speed reduction
20%
Parameter 1-98 ATEX ETR interpol.
points freq.
Motor nameplate.
Parameter 1-99 ATEX ETR interpol
points current
Parameter 1-23 Motor Frequency
Enter the same value as for
parameter 4-19 Max Output
Frequency
.
Parameter 4-19 Max Output
Frequency
Motor nameplate, possibly
reduced for long motor cables,
sine-wave filter, or reduced
supply voltage.
Parameter 4-18 Current Limit
Forced to 150% by 1-90 [20]
Parameter 5-15 Terminal 33
Digital Input
[80] PTC Card 1
Parameter 5-19 Terminal 37 Safe
Stop
[4] PTC 1 Alarm
Parameter 14-01 Switching
Frequency
Check that the default value
fulfills the requirement from
the motor nameplate. If not,
use a sine-wave filter.
Parameter 14-26 Trip Delay at
Inverter Fault
0
Table 3.9 Parameters
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
.
3.2.18 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 3.17 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 Resource
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
(selected in
parameter 3-15 Reference Resource
,
parameter 3-16 Reference Resource 2
, or
parameter 3-17 Reference Resource 3
When using VLT
®
PTC Thermistor Card MCB
112, always select
[0] None
.
[0]
*
None
[1]
Analog
Input 53
[2]
Analog
Input 54
[3]
Digital input
18
Parameter Descriptions
Programming Guide
MG33MP02
Danfoss A/S © 10/2018 All rights reserved.
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Содержание VLT AutomationDrive FC 302
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