60 Rockwell Automation Publication 750-IN119A-EN-P - April 2022
Chapter 5 Power Wiring
Grounding Requirements The safety ground-PE must be connected to the system ground. Ground
impedance must conform to the requirements of national and local industrial
safety regulations and/or electrical codes. Periodically check the integrity of all
ground connections.
Recommended Grounding Scheme
These diagrams show products that are connected to a solid ground single
point (PE only) power source. Some applications can require alternate
grounding schemes, refer to Wiring and Grounding Guidelines for Pulse
Width Modulated (PWM) AC Drives, publication DRIVES-IN001
, for more
information. These applications include installations with long distances
between drives or drive line-ups, which could cause large potential differences
between the drive or line-up grounds.
For installations within a cabinet, use one safety ground point or ground bus
bar connected directly to building steel. Independently ground all circuits
including the AC input ground conductor directly to this point/bar.
Figure 38 - Typical Grounding
Shield Termination—SHLD
The motor cable shield must be connected to earth ground through a shield
terminating or EMI clamp at the drive end and to the motor frame at the
motor end. See installation requirements on page 26
and page 27 for
termination of the motor cable shield at the drive end.
U (T1)
V (T2)
W (T3)
R (L1)
S (L2)
T (L3)
SHLD
PE
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