Safety, Definitions – Rockwell Automation 7000 PowerFlex AC Drive with Direct-to-Drive Technology User Manual

Page 5

Installation Instructions for

Re-installing a Separately Shipped Common Mode Choke (CMC)

Publication 7000-IN003B-EN-P – June 2013

A T T E N T I O N

Ensure lifting provisions have a load rating that
exceeds the equipment weight being lifted.

Only lift the CMC as high as needed to clear barriers, etc.

A T T E N T I O N

Never walk under or place any part of your body
under the equipment being lifted.

Restrict access to the work area during the lifting and handling of the
CMC.

A T T E N T I O N

The VFD enclosure is NOT suitable for lifting
with the CMC installed.

It still can be rolled or

slid into its final position with the CMC installed.

Background

For the largest air-cooled Direct-to-Drive VFDs, the Common Mode
Chokes (CMCs) are relatively heavy (5000 lbs./2267 kg.+). In order to
ease handling of the VFD Enclosure, the CMCs are shipped separately
and the contractor and/or customer must reinstall the CMC into the
VFD Enclosure on site. The CMC is completely installed and tested at
the factory before shipment, then removed for shipment.

Definitions

VFD Enclosure

– the entire VFD metal cabinet assembly. This consists

of a number of cabinet sections, each with its own front access door.

Common Mode Choke (CMC)

– the DC Link Inductor that is

electrically connected between VFD rectifier and inverter to provide the
DC source to the inverter and address Common Mode Voltage.

CMC Cabinet Section

– Part of the overall VFD Enclosure. This

cabinet section houses the CMC. It is located at the far right of the
overall VFD enclosure (looking from the front).

Safety