EMC-correct electrical installation
General points to be observed to ensure EMC-correct
electrical installation.
-
Use only shielded/armoured motor cables
and shielded/armoured control cables.
-
Connect the screen to ground at both ends.
-
Avoid installation with twisted shield ends
(pigtails), since this ruins the shielding effect
at high frequencies. Use cable clamps in-
stead.
-
It is important to ensure good electrical con-
tact from the installation plate through the
installation screws to the metal cabinet of the
variable frequency drive.
-
Use starwashers and galvanically conductive
installation plates.
-
Do not use unshielded/unarmoured motor
cables in the installation cabinets.
The illustration below shows EMC-correct electrical in-
stallation, in which the variable frequency drive has
been fitted in an installation cabinet and connected to
a PLC.
VLT
®
2800 Series
12 MG.27.A2.22 - VLT
®
is a registered Danfoss trademark
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