Rockwell Automation 20D PowerFlex 700 Installation Instructions - Frames 7…10 - Manual (Page 40)

40 Rockwell Automation Publication 20B-IN014H-EN-P - June 2013
PowerFlex 700 Adjustable Frequency AC Drive – Frames 7…10
General Grounding Requirements
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
must be periodically checked.
For installations within a cabinet, use only a single safety ground point or ground
bus bar connected directly to building steel. All circuits including the AC input
ground conductor must be grounded independently and directly to this point/
bar.
Typical Grounding
Safety Ground - PE
This is the safety ground for the drive that is required by code. This point must be
connected to adjacent building steel (girder, joist), a floor ground rod or bus bar
(see above). Grounding points must comply with national and local industrial
safety regulations and/or electrical codes.
Shield Termination
The Shield terminal (PE) provides a grounding point for the motor cable shield.
Connect the motor cable shield to this terminal on the drive (drive end) and the
motor frame (motor end). A shield terminating cable gland can also be used.
When shielded cable is used for control and signal wiring, ground the shield at
the source end only, not at the drive end.
RFI Filter Grounding
Using an optional RFI filter can result in relatively high ground leakage currents.
Therefore, the filter must be used only 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 must not include any
form of plug or socket that permits inadvertent disconnection. Some local codes
can require redundant ground connections. Periodically check the integrity of all
connections. Refer to the instructions supplied with the filter.
IMPORTANT Do Not discard or replace grounding hardware.
U (T1)
V (T2)
W (T3)
R (L1)
S (L2)
T (L3)
PE
SHLD