GE Ecomagination AF-600 FP Programming Manual page 37

Parameter Description
F-07 Accel Time 1
Range:
10.00 [1.00
s - 3600
*
s]
3 3
F-08 Decel Time 1
Range:
20.00 [1.00 -
s 3600 s]
*
F-09 Torque Boost
This parameter is not visible on the LCP.
Range:
100 % [0 -
*
300 %]
36
Function:
Enter the accel time, that is the acceleration time
from 0 RPM–parameter P-06 Base Speed. Select a
accel time such that the output current does not
exceed the current limit in parameter F-43 Current
Limit during ramping. See decel time in
parameter F-08 Decel Time 1.
t × n par . P − 06
acc nom
par . F − 07 =
ref RPM
Function:
Enter the decel time, that is the deceleration
time from parameter P-06 Base Speed–0 RPM.
Select a decel time preventing overvoltage
from arising in the inverter due to regenerative
operation of the motor. The ramp-down time
should also be long enough to prevent that
the generated current exceeds the current limit
set in parameter F-43 Current Limit. See accel
time in parameter F-07 Accel Time 1.
t × n par . P − 06
dec nom
par . F − 08 =
ref RPM
Function:
NOTICE
Parameter F-09 Torque Boost has no
effect when parameter P-20 Motor
Construction = [1] PM, non-salient SPM.
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 [kW] Change–over [Hz]
0.25–7.5 <10
11–45 <5
55–550 <3–4
Table 3.3 Low Speed Load Compensation
s
Illustration 3.4 Low Speed Load Compensation
3.2.2 F-1# Fundamental Parameters 1
NOTICE
When using multiple motors, the electronic thermal relay
on the frequency converter cannot be used to provide
s
individual motor protection. Supply a separate motor
overload for each motor.
F-10 Electronic Overload
Option:
03/2016 All rights reserved.
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 F-12 Motor
Thermistor Input). See
chapter 3.2.3.1 PTC Thermistor
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 and the rated
M,N
motor frequency f . The
M,N
calculations estimate the need for
a lower load at lower speed due
to less cooling from the fan
incorporated in the motor. See
chapter 3.2.3.2 Electronic Thermal
Overload.
•
Via a mechanical thermal switch
(Klixon type). See
chapter 3.2.3.3 Klixon. The ETR
provides class 20 motor overload
protection in accordance with
NEC.
DET-620D