Electrical Installation - Danfoss VACON SISO LCL Installation Manual

Installation Guide | SISO LCL and LC Filters

3 Electrical Installation

Power Cabling
3.1
Install the SISO LCL or LC filter at the input of the drive. Connect the L
correctly, follow the instructions in
In Figure 3, L and L are part of the 4-leg drive side inductor. C
1 CM
inductor, which is only included in LCL filters.
The C capacitor is optional and not included in the delivery by default. The C
CM
bypassing the excess high frequency noise from the load side. For further information, contact Danfoss.
L
2
L1 L1'
L2 L2'
Grid
L3 L3'
Figure 3: Wiring Diagram Example of the SISO LCL Filter Installation
Cable Requirements
3.2
For main power and PE cables, use cable sizes specified by local regulatory instructions and standards for nominal 525 A rms current.
Capacitor cables are not included in the delivery. The cable current ratings are shown in the following illustration as %-value from the
rated RMS current of the filter.
L
2
L1 L1'
L2 L2'
Grid
L3 L3'
Figure 4: Cable Current Ratings for the Capacitor Banks
Grounding
3.3
Make sure that all filter components are connected to PE. Ground the filter in accordance with applicable standards and directives. The
ground connection must be fixed.
Unless local wiring regulations state otherwise, the cross-sectional area of the protective earthing conductor must be at least ½ times
of the phase conductor and made of the same material when the phase conductor cross-section is above 35 mm
60364-5-54; 543.1.
Installing the Power Cables
3.4
4
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3.4 Installing the Power Cables.
L1
L2
L3
C
DM
CMN
C
Delta C
CM
20%
L1
L2
L3
C
DM
CMN
C
Delta C
CM
and C to the DC link. To make sure that the filter functions
CM FB
and C are part of the same capacitor bank. L
DM FB
capacitor is typically used in grounded networks,
CM
L
1
L1'
L2'
L3'
L
1
L1'
L2'
L3'
is the grid side
2
L
CM
DC+' DC+
DC-' DC-
C
FB
L 10%
CM
DC+' DC+
DC-' DC-
C
FB
2
according to IEC
AN477036797705en-000101 / 172K2871A
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