Design Guide | iC7 Series Air-cooled System Modules
6
Electrical Installation Considerations
6.1
Cable Requirements
Follow these requirements for the mains and motor cables used in the drive system.
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Select and install mains cables and motor cables according to the local safety regulations, the input voltage, and the load current of
the drive.
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Use motor cables rated for at least 70 °C (158 °F) surface temperature. If sufficient airflow at motor cable terminals in the cabinet
cannot be ensured, use cables rated for 90 °C (194 °F). Consider the operating temperature of the mains terminals and make sure
that the mains cables do not overheat near the input terminals.
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Use symmetrical power cabling with power units connected in parallel. Each power unit must have the same number of cables with
an equal cross-section and equal length.
The maximum number of power unit cables and bolts sizes can be found in
10.4.1 General Cable Size Information
.
Only use symmetrical and shielded 3-phase motor cables.
. Do not use symmetrical and shielded 3-phase cable with
individual shield for each phase conductor or single-core phase conductors and PE with or without shield, see
To reach C3 EMC performance, use shielded motor and mains cables.
e3
0b
j0
28
.1
0
1
2
3
2
3
Figure 15: Recommended Cable Types for Mains and Motor Cabling
1
PE conductor and shield
2
PE conductor
3
Shield
e3
0b
j0
29
.1
0
1
1
2
2
Figure 16: Not Recommended Motor Cable Types
1
PE conductor
2
Shield
Information related only to UL cable recommendation:
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Use 75 °C (167 °F) rated copper cables only.
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