GE AF-650 GP Programming Manual page 34

Parameter Descriptions
F-08 Decel Time 1
Range: Function:
corresponds to 0.01 s in speed mode. See accel
time in F-07 Accel Time 1.
t dec s x n s RPM
Par F
. − 08 =
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
0.25 kW-7.5 kW
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
Thermistor Connection.
•
Via a KTY sensor in the motor
winding connected to an analog
AF-650 GP Programming Guide
ref RPM
Change over
<10 Hz
DET-618C
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
frequency f
Thermal Overload.
•
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 Continuously overloaded motor, when no
*
protection warning or trip of the frequency converter is
required.
[1] Thermistor Activates a warning when the connected
warning thermistor or KTY-sensor in the motor reacts
in the event of motor over-temperature.
[2] Thermistor Stops (trips) frequency converter when
trip connected thermistor or KTY sensor in the
motor reacts in the event of motor over-
temperature.
The thermistor cut-out value must be > 3
kΩ.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
[3] Elec. OL Calculates the load when set-up 1 is active
Warning 1 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 Calculates the load when set-up 1 is active
1 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
and the rated motor
M,N
. See 3.3.3.3 Electronic
M,N
33
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