INVT Goodrive350 Series Operation Manual page 397

Goodrive350 IP55 High-ingress Protection Series VFD
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D.3 Power supply
See chapter 4 "Installation guidelines".
Ensure that the voltage class of the VFD is consistent with that of the grid.
D.4 Cable
D.4.1 Power cable
The sizes of the input power cables and motor cables must comply with local regulations.
 The input power cables and motor cables must be able to carry the corresponding load
currents.
The maximum temperature margin of the motor cables in continuous working cannot be

lower than 70° C.
 The conductivity of PE grounding conductor is the same as that of the phase conductor.
The cross-sectional area of the PE grounding conductor for 30kW and higher models can
be slightly smaller than the recommended cross-sectional area value.
 For details about the EMC requirements, see Appendix B "Technical data".
To meet the EMC requirements stipulated in the CE standards, you must use symmetrical
shielded cables as motor cables (as shown in the following figure).
Four-core cables can be used as input cables, but symmetrical shielded cables are
recommended. Compared with four-core cables, symmetrical shielded cables can reduce
electromagnetic radiation as well as the current and loss of the motor cables.
Note: If the electrical conductivity of the motor cable shield layer does not meet the
requirements, a separate PE conductor must be used.
To protect the conductors, the cross-sectional area of the shielded cables must be the same as
that of the phase conductors if the cable and conductor are made of materials of the same type.
Name
significantly extending the length of the output cable,
reducing motor eddy current losses and noise, and
protecting motor insulation.
Symmetrical shielded cable
PE conductor and
shielding layer
Conductor
Jacket
PE
Insulator
Description
Shielding
layer
Conductor
Jacket
Insulator
-379-
Optional peripheral accessories
Four-core cable -
Conductor
PE
Insulator
Jacket