AKD 2800
You can also programme the frequency converter to
give a warning signal via one of the digital outputs.
Select ETR Trip 1-4 if you want a trip when the motor
is overloaded according to the calculations.
NB!:
This function cannot protect the individual
motors in the case of motors linked in parallel.
132 DC brake voltage
(DC BRAKE VOLTAGE)
Value:
0 - 100% of max. DC brake voltage
✭ 0%
Function:
In this parameter, the DC brake voltage is set which is
to be activated at stop when the DC brake frequency
set in parameter 127 DC brake cut-in frequency is
reached, or if DC braking inverse is active via a digital
input or via serial communication. Subsequently,
theDCbrakevoltagewillbeactiveforthetime
set in parameter 126 DC brake time.
Description of choice:
To be set as a percentage value of the max. DC
brake voltage, which depends on the motor.
133 Start voltage
(START VOLTAGE)
Value:
0.00 - 100.00 V
✭ Depends on unit
Function:
A higher start torque can be obtained by increasing
the start voltage. Small motors (< 1.0 kW) normally
require a high start voltage.
Description of choice:
The factory setting will be suitable for must
applications, the value may need to be increase
gradually for high torque application.
Warning: If the use of start voltage
is exaggerated, this may lead to
over-energizing and overheating of the
motor and the frequency converter may cut out.
134 Load compensation
(LOAD COMPENSATIO)
Value:
0.0 - 300.0%
✭ 100.0%
Function:
In this parameter, the load characteristic is set. By
increasing the load compensation, the motor is given an
extra voltage and frequency supplement at increasing
loads. This is used e.g. in motors/applications in
which there is a big difference between the full-load
current and idle-load current of the motor.
NB!:
If this value is set too high, the frequency
converter may cut out because of overcurrent.
Description of choice:
If the factory setting is not adequate, load
compensation must be set to enable the motor
tostartatthegivenload.
Warning: Should be set to 0% in
connection with synchronous and
parallel-coupled motors and in the
case of quick load changes. Too high load
compensation may lead to instability.
136 Slip compensation
(SLIP COMP.)
Value:
-500 - +500% of rated slip compensation
✭ 100%
Function:
Slip compensation is calculated automaticall
y, on
the basis of such data as the rated motor speed
n
M,N
. In this parameter, the slip compensation can be
fine-tuned, thereby compensating for toler
ances on
the value for n
M,N
. Slip compensation is only active if
a selection has been made of Speedregulation, open
loop [0] in parameter 100 Configuration an
d Constant
torque [1] in parameter 101 Torque characteristic.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.H2.02 -
22
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