Danfoss VLT AQUA Drive FC 200 Programming Manual page 49

Parameter Description
1-81 Min Speed for Function at Stop [RPM]
Range:
Size related
*
3 3
1-82 Min Speed for Function at Stop [Hz]
Range:
Size related
*
1-86 Trip Speed Low [RPM]
Range:
0 RPM [ 0 - par.
*
4-13 RPM]
NOTE
This parameter is only available if 0-02 Motor Speed Unit is
set to [RPM].
1-87 Trip Speed Low [Hz]
Range:
0 Hz [ 0.0 - par.
*
4-14 Hz]
NOTE
This parameter is only available if 0-02 Motor Speed Unit is
set to [Hz].
3.3.10 1-9* Motor Temperature
1-90 Motor Thermal Protection
Option:
48
Function:
[0 - 600 RPM] Set the speed at which to activate
1-80 Function at Stop.
Function:
[ 0.0 - 20.0 Hz] Set the output frequency at which
to activate 1-80 Function at Stop.
Function:
Set the desired motor speed for trip limit. If
the Trip Speed is set to 0, the function is
not active. If the speed at any time after
the start (or during a stop) falls below the
value in the parameter, the frequency
converter will trip with an alarm [A49]
Speed Limit. Function at stop.
Function:
If the Trip Speed is set to 0, the function is
not active.
If the speed at any time after the start (or
during a stop) falls below the value in the
parameter, the frequency converter will trip
with an alarm [A49] Speed Limit. Function at
stop.
Function:
The frequency converter determines the
motor temperature for motor protection in
two different ways:
•
Via a thermistor sensor connected
to one of the analog or digital
inputs (1-93 Thermistor Source).
•
Via calculation (ETR = Electronic
Thermal Relay) of the thermal
load, based on the actual load
and time. The calculated thermal
load is comed with the rated
MG20O602 - VLT
®
VLT AQUA Drive Programming Guide
1-90 Motor Thermal Protection
Option:
[0] No protection
[1] Thermistor
warning
[2] Thermistor trip Stops (trips) the frequency converter when
[3] ETR warning 1
[4] ETR trip 1
*
[5] ETR warning 2
[6] ETR trip 2
[7] ETR warning 3
[8] ETR trip 3
[9] ETR warning 4
[10] ETR trip 4
ETR (Electronic Thermal Relay) functions 1-4 will calculate
the load when set-up where they were selected is active.
For example ETR-3 starts calculating when set-up 3 is
selected. For the North American market: The ETR
functions provide class 20 motor overload protection in
accordance with NEC.
2000
1000
600
500
400
300
200
100
60
50
40
30
20
10
Illustration 3.11
®
is a registered Danfoss trademark
Function:
motor current I
motor frequency f
calculations estimate the need for
a lower load at lower speed due
to less cooling from the fan
incorporated in the motor.
If the motor is continuously overloaded
and no warning or trip of frequency
converter is wanted.
Activates a warning when the connected
thermistor in the motor reacts in the event
of motor over-temperature.
the connected thermistor in the motor
reacts in the event of motor over-
temperature.
t [s]
1.0 1.2 1.4 1.6 1.8 2.0
and the rated
M,N
. The
M,N
f OUT = 1 x f M,N (par. 1-23)
f OUT = 2 x f M,N
f OUT = 0. 2 x f M,N
I
M
I (par. 1-24)
MN