Rockwell Automation 20D PowerFlex 700H and 700S Frame 9...14 Drives - Manual (Page 21)

Rockwell Automation Publication PFLEX-IN006E-EN-P - July 2013 21
General Installation Information Chapter 1
General Grounding
Requirements Safety Ground - PE
The drive Safety Ground - PE must be connected to system ground. Ground
impedance must conform to the requirements of national and local industrial
safety regulations and/or electrical codes. The integrity of all ground connections
should be periodically checked.
For installations within a cabinet, a single safety ground point or ground bus bar
connected directly to building steel should be used. All circuits including the AC
input ground conductor should be grounded independently and directly to this
point/bar.
Table 1 - Typical Grounding
Shield Termination - SHLD
The Shield terminal provides a grounding point for the motor cable shield. It
must be connected to an earth ground by a separate continuous lead. The motor
cable shield should be connected to this terminal on the drive (drive end) and the
motor frame (motor end). A shield terminating cable gland may also be used.
When shielded cable is used for control and signal wiring, the shield should be
grounded at the source end only, not at the drive end.
RFI Filter Grounding
Using an optional RFI filter may result in relatively high ground leakage currents.
Therefore, the filter must only be used in installations with grounded AC
supply systems and be permanently installed and solidly grounded
(bonded)
to the building power distribution ground. Ensure that the incoming supply
neutral is solidly connected (bonded) to the same building power distribution
ground. Grounding must not rely on flexible cables and should not include any
form of plug or socket that would permit inadvertent disconnection. Some local
codes may require redundant ground connections. The integrity of all
connections should be periodically checked. See the instructions supplied with
the filter.
U (T1)
V (T2)
W (T3)
R (L1)
S (L2)
T (L3)
PE
SHLD