Rockwell Automation Publication 750-IN119A-EN-P - April 2022 61
Chapter 5 Power Wiring
Radio Frequency Interference (RFI) Filter Grounding
An optional RFI filter can 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. Be sure 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 exclude any form
of plug or socket that would permit inadvertent disconnection. Some local
codes can require redundant ground connections. Periodically check the
integrity of all connections. See the instructions that are supplied with the
filter.
RF Emission Category C3
Compliant Wiring
To help meet the EN 61800-3 Category C3 standard for RF emissions,
PowerFlex 755TS drives, frames 1…5, are equipped with a shield termination
bracket. You need to install the bracket on frame 1 drives.
An EMC C3 kit is available for frames 6 drives (20-750-EMC6-F6) and frame 7
drive (20-750-EMC6-F7).
Figure 39 - Install the EMC C3 Shield Termination Bracket
Frame Fastener Torque Tool Replacement Kit Cat. No.
1 M4 x 10 mm (Polycarbonate) 0.34 N•m (3 lb•in)
T20 or
F - 6.4 mm (0.25 in.)
SK-RT-EMC3-Fn
(n = frame number)
2…5 M4 x 10 mm (Steel) 1.8 N•m (16 lb•in)
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