PowerFlex® 700S Drives - Phase I Control (Frame Sizes 9 & 10) 25
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 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 C 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 - 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. Refer to the instructions supplied with the filter.
U (T1)
V (T2)
W (T3)
R (L1)
S (L2)
T (L3)
PE
SHLD
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