Danfoss VLT FCD 303 Operating Instructions Manual page 42

109 Stator reactance X
(STATOR REACTANCE)
Value:
0.00 - X,XX
Depends on choice of motor
Function:
After setting of parameters 102-106 Nameplate data,
a number of adjustments of various parameters
are made automatically, including stator reactance
X . The shaft performance can be improved by
S
fine-tuning R and X , see procedure below.
S S
Description of choice:
X can be set as follows:
S
1. The value is stated by the motor supplier.
2. The value is obtained through manual
measurements X is obtained by connecting a
S
motor to mains and measuring the phase-phase
voltage U and the idle current
M
X : See parameter 142.
L
3. Use the factory settings of X
frequency converter itself chooses on the basis
of the motor nameplate data.
117 Resonance dampening
(RESONANCE DAMP.)
Value:
0 - 100 %
Function:
Reduces the output voltage when running at low
load for avoiding resonance phenomena.
Description of choice:
If 0 is selected, there will be no reduction. If 100 % is
selected, the voltage is reduced to 50% at no load.
119 High start torque
(HIGH START TORQ.)
Value:
0.0 - 0.5 sec.
Function:
To ensure a high start torque approx. 1.8 x I
permitted for max. 0.5 sec. The current is, however,
limited by the frequency converter's (inverter's) safety
limit. 0 sec. corresponds to no high start torque.
= factory setting. () = display text [] = value for use in communication via serial communication port
42
S
.
which the
S
0 %
0.0 sec.
can be
INV.
®
VLT FCD Series
Description of choice:
Set the necessary time for which a high
start torque is required.
120 Start delay
(START DELAY)
Value:
0.0 - 10.0 sec.
Function:
This parameter enables a delay of the start-up time
after the conditions for start have been fulfilled.
When the time has passed, the output frequency
will start by ramping up to the reference.
Description of choice:
Set the necessary time before commencing
to accelerate.
121 Start function
(START FUNCTION)
Value:
DC hold during start delay time
(DC HOLD/DELAY TIME)
DC brake during start delay time
(DC BRAKE/DELAY TIME)
Coasting during start delay time
(COAST/DELAY TIME)
Start frequency/voltage clockwise
(CLOCKWISE OPERATION)
Start frequency/voltage in reference direction
(VERTICAL OPERATION)
Function:
This is where to choose the required mode during the
start delay time (parameter 120 Start delay time).
Description of choice:
Select DC hold during start delay time [0] to energize
the motor with a DC hold voltage during the start delay
time. Set voltage in parameter 137 DC hold voltage.
Choose DC brake during start delay time [1] to energize
the motor with a DC brake voltage during the start delay
time. Set voltage in parameter 132 DC brake voltage.
Choose Coasting during start delay time [2] and the
motor will not be controlled by the frequency converter
during the start delay time (inverter turned off).
MG.04.B7.02 - VLT is a registered Danfoss trademark
0.0 sec.
[0]
[1]
[2]
[3]
[4]