Appendix C
161
C.3 Power supply
Please refer to
Electrical Installation
.
Check that the voltage degree of the VFD complies with the voltage of the
supply power voltage.
C.4 Cables
C.4.1 Power cables
Dimension the input power and motor cables according to local regulations.
•
The input power and the motor cables must be able to carry the corresponding load currents.
•
The cable must be rated for at least 70 °C maximum permissible temperature of the conductor
in continuous use.
•
The conductivity of the PE conductor must be equal to that of the phase conductor (same
cross-sectional area). For the 030G/037P and higher models, the cross sectional area of the
PE grounding conductor can be slightly less than the recommended area.
•
Refer to chapter
Technical Data
for the EMC requirements.
A symmetrical shielded motor cable (see the figure below) must be used to meet the EMC
requirements of the CE.
A four-conductor system is allowed for input cabling, but a shielded symmetrical cable is
recommended. Compared to a four-conductor system, the use of a symmetrical shielded cable
reduces electromagnetic emission of the whole drive system as well as motor bearing currents and
wear.
