Rockwell Automation Publication 750-RM004A-EN-P - April 2018 25
Selection Considerations Chapter 1
Recommended Grounding Scheme
For installations where the drive is within an enclosure, use a safety ground
point or ground busbar to connect directly to building steel. All circuits
including the AC input ground conductor must be grounded independently
and directly to this point or ground busbar. Rockwell Automation
recommends a wye secondary isolation transformer with a solid grounded X0
connection (Figure 1
).
Figure 1 - Recommended Grounding Method
IMPORTANT You must install jumper conductors or splices between the PE bus bar
terminals of adjacent enclosures.
DC+
DC-
DC+
DC-
PE PE
PEPE
R (L1)
S (L2)
T (L3)
U (T1)
V (T2)
W (T3)
SHLD
To Line PE (Input Bay)
To PE (Power Bay)
Input Bay Power Bay
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