Checking the compatibility of the motor and drive
Check that the 3-phase AC induction motor and the drive are compatible according
to the rating table in section Ratings on page 137. The table lists the typical motor
power for each drive type.
Selecting the power cables
General
rules
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. See section Ratings on page 137 for the rated currents.
• The cable must be rated for at least 70 °C maximum permissible temperature of
the conductor in continuous use. For US, see section Additional US requirements
on page 32.
• The conductivity of the PE conductor must be equal to that of the phase
conductor (same cross-sectional area).
• 600 V AC cable is accepted for up to 500 V AC.
• Refer to chapter Technical data on page 137 for the EMC requirements.
A symmetrical shielded motor cable (see the following figure) must be used to meet
the EMC requirements of the CE and C-Tick marks.
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.
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