Danfoss VLT 5000 Series, Инструкция по эксплуатации, Страница: 142 / 240

454 Dead time compensation
(DEADTIME COMP.)
Value:
Off (OFF) [0]
On (ON) [1]
Function:
The active inverter dead time compensation which is
part of the VLT 5000 control algorithm (VVC+) is caus-
ing instability at standstill when working in closed-loop
control. The purpose of this parameter is switching off
the active dead time compensation to avoid instability.
Description of choice:
Select Off [0] to inactivate the dead time compensa-
tion.
Select
On [1] to activate the dead time compensation.
455 Frequency range monitor
(MON. FREQ. RANGE)
Value:
Disable [0]
Enable [1]
Function:
This parameter is used if warning 35 Out of frequency
range must be turned off in the display in process con-
trol closed loop. This parameter does not affect the
extended status word.
Description of choice:
Select Enable [1] to enable the readout in the display
if warning 35 Out of frequency range occurs. Select
Disable [0] to disable the readout in the display if warn-
ing 35 Out of frequency range occurs.
457 Phase loss function
(Phase loss funct)
Value:
Trip (Trip) [0]
Warning (Warning) [1]
Function:
Select the function which is to be activated if the mains
imbalance becomes too high or if a phase is missing.
Description of choice:
At Trip [0] the adjustable frequency drive will stop the
motor within a few seconds (depending on drive size).
At
Warning [1] only a warning will be exported when a
mains failure occurs, but in severe cases, other ex-
treme conditions might result in a trip.
NOTE
If Warning has been selected, the life ex-
pectancy of the drive will be reduced when
the mains failure persists.
NOTE
At phase loss, the internal cooling fans of
some drive types cannot be powered. In
order to avoid overheating, an external
power supply can be connected.
IP00/IP20/NEMA
- VLT 5032-5052, 200-240 V
- VLT 5122-5552, 380-500 V
- VLT 5042-5602, 525-690 V
- IP54
- VLT 5006-5052, 200-240 V
- VLT 5016-5552, 380-500 V
- VLT 5042-5602, 525-690 V
See also
Electrical Installation.
483 Dynamic DC link compensation
(DC link comp.)
Value:
Off [0]
On [1]
Function:
The adjustable frequency drive includes a feature,
which ensures that the output voltage is independent
of any voltage fluctuation in the DC link, e.g. caused
by fast fluctuation in the mains supply voltage. The
benefit is a very steady torque on motor shaft (low tor-
que ripple) under most mains conditions.
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark. 139
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mming