Danfoss VLT 28 Manual page 8

I 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 instead.
MG.28.A8.22 - VLT is a registered Danfoss trademark
VLT® 2800 Series
- It is important to ensure good electrical contact 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
installation, in which the variable frequency
drive has been fitted in an installation cabinet
and connected to a PLC.
11