Danfoss VLT AQUA Design Manual page 84

5. How to Install
The earth connection cable cross section must be at least 10 mm
The mains connection is fitted to the main switch if this is included.
NB!
Check that mains voltage corresponds to the mains voltage of the frequency converter name plate.
IT Mains
5
Do not connect 400 V frequency converters with RFI-filters to mains supplies with a voltage between phase and earth of more than
440 V.
For IT mains and delta earth (grounded leg), mains voltage may exceed 440 V between phase and earth.
Illustration 5.1: Terminals for mains and earthing.
84
2
or 2 rated mains wires terminated separately according to EN 50178.
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MG.20.N3.02 - VLT is a registered Danfoss trademark
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VLT AQUA Drive Design Guide