Grounding Principles; Cable Requirements - Danfoss iC7 Series Design Manual

Design Guide | iC7 Series Liquid-cooled System Modules

Grounding Principles

7.3
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
2
above 35 mm (AWG 2).
The connection must be fixed.

Cable Requirements

7.4
Cable Requirements
7.4.1
Follow these requirements for the mains and motor cables used in the drive system.
Select and install mains cables and motor cables according to the local safety regulations, the input voltage, and the load current of
l
the drive. Protective conductor size must meet the requirements of IEC 61800-5-1.
Use motor cables rated for +90 °C (194 °F) surface temperature. Consider the operating temperature of the mains terminals and
l
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.
Use symmetrical power cabling with power units connected in parallel. Each power unit must have the same number of cables with
l
an equal cross-section and equal length.
The maximum number of power unit cables and bolts sizes can be found in
Only use symmetrical and shielded 3-phase motor cables.See
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.
1
3
Figure 59: Recommended Cable Types for Mains and Motor Cabling
1
PE conductor and shield
3
Shield
Danfoss Drives Oy © 2024.03
Figure
2
3
10.4.1 List of Cable Size
59. Do not use symmetrical and shielded 3-phase cable with
2
2
PE conductor
AJ475942178716en-000101 / 172K2848A |
Information.
Figure 60.
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