6.10 300-** AF Settings
NOTICE
Except for parameter 300-10 Active Filter Nominal Voltage,
it is not recommended to change the settings in this
parameter group.
300-00 Harmonic Cancellation Mode
Option: Function:
[0] * Overall
[1] Selective
[2] Parallel
Enter the harmonic compensation mode. [1]
Selective provides precise compensation of the
following harmonics: 5,7,11,13,17,19,23,25. [0]
Overall provides compensation for additional
harmonics, but with reduced precision in some
cases.
300-01 Compensation Priority
Option: Function:
[0] * Harmonics
[1] Cosphi Enter the compensation priority for the active
filter. If cosphi compensation has priority,
harmonics compensation is reduced in cases
where a large amount of current is used to
compensate cosphi. Similarly, if harmonics
mitigation has priority, cosphi compensation
might be reduced.
300-08 Lagging Reactive Current
Option: Function:
[0]
[1]
Enable
Disable
Enable/disable lagging reactive current.
300-10 Active Filter Nominal Voltage
Range: Function:
Application
dependent*
[Application
dependant]
Enter the network voltage at
the location where the active
filter is installed. If using a
step-down transformer, enter
the transformer secondary side
voltage.
300-20 CT Primary Rating
Range: Function:
Application
dependent*
[1 -
4000 A]
Enter the primary rating of the
current transformers. For a 1000:5
current transformer, enter 1000.
Alternatively, this value can be
determined by performing an auto
CT detection using parameter 300-29
Start Auto CT Detection.
300-24 CT Sequence
Option: Function:
[0] * L1, L2, L3
[1] L1, L3, L2
[2] L2, L1, L3
[3] L2, L3, L1
[4] L3, L1, L2
[5] L3, L2, L1 Enter the sequence of the current transformers.
Alternatively, this value can be determined by
performing an auto CT detection using
parameter 300-29 Start Auto CT Detection.
300-25 CT Polarity
Option: Function:
[0] * Normal
[1] Inverse Enter the polarity of the current transformers.
Alternatively, this value can be determined by
performing an auto CT detection using parameter
300-29 Start Auto CT Detection.
300-26 CT Placement
Option: Function:
[0] PCC
[1] * Load Current Enter the placement of the current
transformers. For a standalone active filter
installation, the CTs are typically placed at a
PCC.
300-27 Number of CTs per Phase
Option: Function:
[1]
[2]
1
2
Number of current transformers per phase.
300-29 Start Auto CT Detection
Option: Function:
[0] * Off
[1] Enable Auto
CT Detection
When enabled, the auto CT detection
determines the CT primary rating, CT
sequence, and CT polarity. The user must
enter CT secondary rating, CT nominal
voltage and CT placement before starting
the auto CT detection. Automatic CT
detection cannot be performed on CTs
placed at the load currents.
300-30 Compensation Points
Range: Function:
0.0
A*
[0.0 -
8000.1 A]
Enter the maximum accepted distortion of the
current in A. Change these values to customise
the harmonic compensation. It is possible to
change the compensation points for the
following harmonics: 5,7,11,13,17,19,23,25.
Selective mode provides compensation of
individual harmonics with permitted residual
levels on the supply mains. This parameter
Applications and Basic Prog... Operating Instructions
58 Danfoss A/S © 09/2014 All rights reserved. MG90V302
66
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