Danfoss VLT AQUA Drive FC 202 Programming Manual page 118

Parameter Description
14-43 Motor Cosphi
Range:
Size [0.40 -
related 0.95 ]
*
3 3
NOTICE
This parameter is not active when parameter 1-10 Motor
Construction is set to [1] PM, non-salient SPM.
3.13.6 14-5* Environment
These parameters help the frequency converter to operate
under special environmental conditions.
14-50 RFI Filter
Option: Function:
[0] Off Select [0] Off only when the frequency converter is
supplied from an isolated mains source, i.e. IT mains. In
this mode, the internal RFI capacities (filter capacitors)
between chassis and the Mains RFI Filter circuit are cut
off to avoid damage to the intermediate circuit and to
reduce the ground capacity currents (according to IEC
61800-3).
[1] On Select [1] On to ensure the frequency converter
complies with EMC standards.
14-51 DC Link Compensation
Option: Function:
The rectified AC-DC voltage at the frequency
converter's DC-link is associated with voltage ripples.
These ripples can increase in magnitude with increased
load. These ripples are undesirable because they can
generate current and torque ripples. A compensation
method is used to reduce these voltage ripples at DC-
link. In general, DC-link compensation is recommended
for most applications, but care must be taken when
operating in field weakening as it can generate speed
oscillations at the motor shaft. In field weakening, it is
recommended to turn DC-link compensation off.
[0] Off Disables DC-link Compensation.
[1] On Enables DC-link Compensation.
14-52 Fan Control
Option:
[0] Auto
116
Programming Guide
Function:
The Cos(phi) setpoint is automatically set
for optimum AEO performance during
AMA. This parameter should normally not
be altered. However in some situations it
may be necessary to enter a new value to
fine-tune.
Function:
Select the minimum speed of the main fan.
Select [0] Auto to run the fan only when the
internal temperature of the frequency
converter is in the range +35 °C to approxi-
mately +55 °C. The fan runs at low speed at
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
14-52 Fan Control
Option: Function:
+35 °C and at full speed at approximately +55
°C.
[1] On 50%
[2] On 75%
[3] On 100%
[4] Auto (Low
temp env.)
14-53 Fan Monitor
Option: Function:
Select which reaction the frequency converter
should take in case a fan fault is detected.
[0] Disabled
[1] Warning
[2] Trip
14-55 Output Filter
Option: Function:
NOTICE
This parameter cannot be adjusted while
motor is running.
Select the type of output filter connected.
[0] No
Filter
[1] Sine-
Wave
Filter
[2] Sine- If a Danfoss Sine-wave filter is connected to the
Wave output, this option secures that the switching
Filter frequency is fixed above the design frequency of
Fixed the filter (to be set in parameter 14-01 Switching
Frequency) in the specific power size. This prevents
the filter from being noisy, overheated and
damaged.
NOTICE
The switching frequency will still be
automatically controlled by the TAS feature
depending on the temperature but limited
to always be above the critical level for the
Danfoss filter.
14-59 Actual Number of Inverter Units
Range: Function:
Size related [ 1 - 1 ] Sets the actual number of operating
*
inverter units.
MG20O702