GE AF-650 GP Programming Manual page 36

Parameter Descriptions
F-08 Decel Time 1
Range: Function:
3.00 [0.01 - Enter the decel time, i.e. the deceleration time
s 3600 s] from the synchronous motor speed n
*
Select a decel time such that no overvoltage
occurs in the inverter due to regenerative
operation of the motor, and such that the
generated current does not exceed the current
limit set in parameter F-43 Current Limit. The
value 0.00 corresponds to 0.01 s in speed mode.
See accel time in parameter F-07 Accel Time 1.
t s x n
dec
Par . F − 08 =
ref RPM
F-09 Torque Boost
Range: Function:
100 % [0 - Enter the % value to compensate voltage in
300 %] 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 - 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:
Motor thermal protection can be
implemented using a range of techniques:
•
Via a PTC sensor in the motor
windings connected to 1 of the
analog or digital inputs
DET-618D
AF-650 GP™ Programming Guide
to 0 RPM.
s
RPM
s
Changeover
<10 Hz
02/2016 All rights reserved.
F-10 Electronic Overload
Option: Function:
(parameter F-12 Motor Thermistor
Input). See chapter 3.3.3.1 PTC
Thermistor Connection.
•
Via a KTY sensor in the motor
winding connected to an analog
input (parameter H-96 KTY
Thermistor Input). See
chapter 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
chapter 3.3.3.3 Electronic Thermal
Overload.
•
Via a mechanical thermal switch
(Klixon type). See
chapter 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 overtemperature.
[2] Thermistor Stops (trips) the frequency converter when
trip connected thermistor or KTY sensor in the
motor reacts in the event of motor overtem-
perature.
The thermistor cut-out value must be more
than 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 1 of the digital outputs.
[4] Elec. OL Trip Calculates the load when set-up 1 is active
*
1 and stops (trips) the frequency converter
when the motor is overloaded. Program a
warning signal via 1 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
and the rated motor
M,N
. See
M,N
35
3 3