Danfoss VLT AutomationDrive Design Manual page 222

Electrical Installation
Leave the screen as close to the connectors as possible.
Illustration 8.63 shows an example of an EMC-correct
electrical installation of an IP 20 frequency converter. The
frequency converter is fitted in an installation cabinet with
an output contactor and connected to a PLC, which is
installed in a separate cabinet. Other ways of doing the
installation may have just as good an EMC performance,
Mains-supply
L1
L2
L3
PE
Reinforced protective earth
Illustration 8.63 EMC-correct Electrical Installation of a Frequency Converter in Cabinet.
FC 300 Design Guide
Panel
PLC etc.
PLC
Min. 16 mm 2
Equalizing cable
Control cables
Min. 200mm
between con-
trol cables,
motor cable and
mains cable
®
MG.33.BD.02 - VLT is a registered Danfoss trademark
provided the above guide lines to engineering practice are
followed.
If the installation is not carried out according to the
guideline and if unscreened cables and control wires are
used, some emission requirements are not complied with,
although the immunity requirements are fulfilled. See the
paragraph EMC test results.
Output con-
tactor etc.
Earthing rail
Cable insula-
tion stripped
All cable entries in
one side of panel
Motor cable
Motor, 3 phases and
Protective earth
8 8
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