Rockwell Automation 7000 PowerFlex AC Drive with Direct-to-Drive Technology - Manual (Page 6)

2 Re-installing a Separately Shipped Common Mode Choke (CMC) • Installation Instructions
Publication 7000-IN003B-EN-P – June 2013
Definitions (cont.) Dimension Drawings – These are part of the project-specific drawing set
supplied for each individual factory order. They show the VFD Enclosure
front elevation, roof and floor plans, as well as general information.
CMC Lifting Provisions – Two series of in-line metal rungs (one series
for each fork of the forklift) welded to the top of the CMC frame.
CMC Isolation Mounting Strips – These reduce the noise that could be
caused by the operation of the CMC, by isolating the base of the CMC
from the VFD Enclosure floor. These black rubber strips are placed
between the CMC and the floor of the CMC Cabinet.
Air Baffles – These help to direct the airflow (induced by the cooling
fan) through the core of the CMC. These are two clear rigid corrugated
plastic sheets trimmed to fit around the CMC. One is placed in front and
one is placed behind the CMC.
Siting Move the VFD Enclosure and the CMC close to the area where the VFD
will be installed.
I M P O R T A N T I M P O R T A N T Please note that the CMC should be installed
through the rear of VFD Enclosure and a fork lift is
typically required to install the CMC. Therefore
adequate space is required above and behind the VFD
enclosure for the fork lift. Usually where the VFD is
finally installed, adequate rear or overhead clearance is
restricted. Therefore the installation of the CMC
typically must be performed before final placement of
the VFD Enclosure.
The CMC could be removed from the front of the enclosure but this
requires additional disassembly of interior barriers in the structure.