10 electronic overload, 0 electronic overload, 2 f-1# fundamental 1 – GE Industrial Solutions AF-650 GP General Purpose Drive Programming Guide User Manual
Page 34
F-08 Decel Time 1
Range:
Function:
corresponds to 0.01 s in speed mode. See accel
time in F-07 Accel Time 1.
Par
.
F
− 08 =
tdec
s
x
ns
RPM
ref
RPM
F-09 Torque Boost
Range:
Function:
100 %
*
[0 - 300
%]
Enter the % value to compensate voltage in
relation to load when the motor is running at
low speed and obtain the optimum U/f
characteristic. The motor size determines the
frequency range within which this parameter
is active.
Motor size
Change over
0.25 kW-7.5 kW
<10 Hz
Illustration 3.5 Changeover
3.3.2 F-1# Fundamental 1
Parameters to configure drive electronic overload and
high/low speed limits.
F-10 Electronic Overload
Option:
Function:
Thermal motor protection can be
implemented using a range of techniques:
•
Via a PTC sensor in the motor
windings connected to one of the
analog or digital inputs (F-12 Motor
Thermistor Input). See 3.3.3.1 PTC
•
Via a KTY sensor in the motor
winding connected to an analog
F-10 Electronic Overload
Option:
Function:
input (H-96 KTY Thermistor Input).
See 3.3.3.2 KTY Sensor Connection.
•
Via calculation of the thermal load,
based on the actual load and time.
The calculated thermal load is
compared with the rated motor
current I
M,N
and the rated motor
frequency f
M,N
. See 3.3.3.3 Electronic
•
Via a mechanical thermal switch
(Klixon type). See 3.3.3.4 Klixon.
For the North American market: The
electronic overload functions provide class
20 motor overload protection in accordance
with NEC.
[0]
*
No
protection
Continuously overloaded motor, when no
warning or trip of the frequency converter is
required.
[1]
Thermistor
warning
Activates a warning when the connected
thermistor or KTY-sensor in the motor reacts
in the event of motor over-temperature.
[2]
Thermistor
trip
Stops (trips) frequency converter when
connected thermistor or KTY sensor in the
motor reacts in the event of motor over-
temperature.
The thermistor cut-out value must be > 3
k
Ω.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
[3]
Elec. OL
Warning 1
Calculates the load when set-up 1 is active
and activates a warning on the display when
the motor is overloaded. Program a warning
signal via one of the digital outputs.
[4]
Elec. OL Trip
1
Calculates the load when set-up 1 is active
and stops (trips) frequency converter when
the motor is overloaded. Program a warning
signal via one of the digital outputs. The
signal appears in the event of a warning
and if the frequency converter trips (thermal
warning).
[5]
Elec. OL
Warning 2
[6]
Elec. OL Trip
2
[7]
Elec. OL
Warning 3
[8]
Elec. OL Trip
3
[9]
Elec. OL
Warning 4
Parameter Descriptions
AF-650 GP Programming Guide
DET-618C
33
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