Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 54

Parameter Description
3.3.12.3 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.
3 3
Example using a digital input and 24 V as supply
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.
12 13 18 19 27 29
PTC / Thermistor
Illustration 3.15 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 Illustration 3.14 (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.
1-93 Thermistor Source
Option:
52
VLT
OFF
32 33 20 37
ON
<6.6 k Ω >10.8 k Ω
= 1 x f
out
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 1 Source,
Danfoss A/S © 05/2016 All rights reserved.
®
Refrigeration Drive FC 103
1-93 Thermistor Source
Option:
®
[0] None
*
[1] Analog
Input 53
[2] Analog
Input 54
[3] Digital input
18
[4] Digital input
19
[5] Digital input
32
[6] Digital input
33
R
) is
M,N
Function:
parameter 3-16 Reference 2 Source, or
parameter 3-17 Reference 3 Source).
®
When using VLT PTC Thermistor Card MCB
112, always select [0] None.
MG16H202