Danfoss VLT 6000 HVAC Series User Manual

Function:
The Fire Mode frequency is the fixed output frequency
used when Fire Mode is activated via terminal 16 or
17.
Description of choice:
Set the required output frequency to be used during
Fire Mode.
432 Fire mode bypass delay, s
(FIRE M. BYP. DELAY)
Value:
0 - 600 sec.
0 sec.
Function:
This time delay is used in case the frequency converter
trips caused by an alarm. After a trip, and the delay
time has passed, an output is set. Please see descrip-
tion of Fire Mode and parameter 319, 321, 323 and
326 for further information.
Description of choice:
Set the required time delay before trip and setting the
output.
483 Dynamic DC link compensation
(DC link comp.)
Value:
Off [0]
On [1]
Function:
The frequency converter includes a feature, which en-
sures 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 torque ripple)
under most mains conditions.
Description of choice:
In some cases this dynamic compensation can cause
resonance’s in the DC link and should then be disa-
bled. Typical cases are where a line choke or a passive
harmonic filter (e.g. filters AHF005/010) is mounted in
the mains supply to the frequency converter to sup-
press harmonics. Can also occur on mains with low
short circuit ratio.
VLT
®
6000 HVAC Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
154 MG.61.B5.02 - VLT
®
is a registered Danfoss trademark

Danfoss VLT 6000 HVAC Series Specifications

General

Brand	Danfoss
Model	VLT 6000 HVAC Series
Category	DC Drives
Language	English