Danfoss VLT FC 102 Programming Manual page 68

Parameter Descriptions
NOTICE
To achieve the highest accuracy with the slip compen-
sation, an Automatic motor adaptation (AMA) should be
performed. To be enabled in parameter 1-29 Automatic
Motor Adaptation (AMA).
3 3
NOTICE
Trip is not active when using a normal stop- or coast
command.
1-86 Trip Speed Low [RPM]
Range:
Size
related RPM]
*
1-87 Trip Speed Low [Hz]
Range:
Size
related Hz]
*
3.3.12 1-9* Motor Temperature
NOTICE
When using multiple motors, the electronic thermal relay
on the frequency converter cannot be used to provide
individual motor protection. Supply a separate motor
overload for each motor.
66
Function:
NOTICE
[ 0 - par. 4-13
This parameter is only
available if
parameter 0-02 Motor Speed
Unit is set to [11] RPM.
Enter the low limit for the motor
speed at which the frequency
converter trips. If the value is 0, the
function is not active. If the speed
at any time after the start (or
during a stop) drops below the
value in the parameter, the
frequency converter trips with
alarm 49, Speed Limit.
Function:
NOTICE
[ 0 - par. 4-14
This parameter is only
available if
parameter 0-02 Motor Speed
Unit is set to [1] Hz.
Enter the low limit for the motor
speed at which the frequency
converter trips. If the value is 0, the
function is not active. If the speed
at any time after the start (or
during a stop) drops below the
value in the parameter, the
frequency converter trips with
alarm 49, Speed Limit.
Danfoss A/S © 10/2019 All rights reserved.
®
VLT HVAC Drive FC 102
1-90 Motor Thermal Protection
Option:
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
Function:
The frequency converter determines
the motor temperature for motor
overload protection in 2 different
ways:
•
Via a thermistor sensor
connected to 1 of the
analog or digital inputs
(parameter 1-93 Thermistor
Source). See
chapter 3.3.13.1 PTC
Thermistor Connection.
•
Via calculation
(ETR=electronic thermal
relay) of the thermal load,
based on the actual load
and time. The calculated
thermal load is compared
with the rated 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.
See chapter 3.3.13.2 ETR.
•
Via a mechanical thermal
switch (Klixon type). See
chapter 3.3.13.3 Klixon. The
ETR provides class 20
motor overload protection
in accordance with NEC.
No protection If the motor is continuously
overloaded, and no warning or trip
of frequency converter is wanted.
Thermistor Activates a warning when the
warning connected thermistor in the motor
reacts in the event of motor
overtemperature.
Thermistor trip Stops (trips) the frequency
converter when the connected
thermistor in the motor reacts in
the event of motor overtem-
perature.
ETR warning 1
ETR trip 1
ETR warning 2
ETR trip 2
ETR warning 3
ETR trip 3
ETR warning 4
ETR trip 4
and the rated
M,N
. The
M,N
M0010001