Electrical Design
‑92‑
3.4.5 Grounding of the Cabinet System
The most economical and effective measure to suppress interference in the cabinet is
to isolate the interference source from the equipment that may be interfered during
installation. According to the strength of interference sources, the electric cabinet
must be divided into multiple EMC areas or multiple cabinets, and the equipment
must be installed in the corresponding areas according to the wiring requirements in
the following table.
Figure 3‑31 Recommended cabinet system grounding
Table 3–42 Cabinet system grounding requirements
No.
Wiring Requirements
1
Place the control equipment and the drive equipment in two separate
cabinets.
2
When multiple cabinets are used, grounding cables with a cross‑
sectional area of at least 16 mm
2
shall be used for connection between
cabinets to realize equipotential between cabinets.
3
Place the equipment in different areas according to the signal strength
inside the cabinet.
4
Equipotential bonding must be carried out for equipment in different
areas of the cabinet.
5
All communication (for example, RS485) and signal cables leading
from the electrical cabinet must be shielded.
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