Design Guide | iC7 Series Liquid-cooled System Modules
7.3 Grounding Principles
Ground the AC drive in accordance with applicable standards and directives.
According to IEC 60364-5-54; 543.1, unless local wiring regulations state otherwise, the cross-sectional area of the protective grounding
conductor must be at least ½ times of the phase conductor and made of the same material when the phase conductor cross-section is
above 35 mm
2
(AWG 2).
The connection must be fixed.
7.4 Cable Requirements
7.4.1 Cable Requirements
Follow these requirements for the mains and motor cables used in the drive system.
l Select and install mains cables and motor cables according to the local safety regulations, the input voltage, and the load current of
the drive. Protective conductor size must meet the requirements of IEC 61800-5-1.
l Use motor cables rated for +90 °C (194 °F) surface temperature. Consider the operating temperature of the mains terminals and
make sure that the mains cables do not overheat near the input terminals. Sufficient forced air cooling is required for the cables
when operating in high ambient temperatures.
l 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 List of Cable Size Information.
Only use symmetrical and shielded 3-phase motor cables.See Figure 59. 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 Figure 60.
To reach C3 EMC performance, use shielded motor and mains cables.
Figure 59: Recommended Cable Types for Mains and Motor Cabling
1 PE conductor and shield 2 PE conductor
3 Shield
Danfoss Drives Oy © 2024.03 AJ475942178716en-000101 / 172K2848A | 67
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