Rockwell Automation 22D AC Drive Installation Considerations - Manual (Page 2)

*PN-73136*
PN-73136
Publication DRIVES-IN003A-EN-P - April 2010
Copyright © 2010 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
Measure Line-To-Line Voltages
Verify that the drive input voltage has an unbalance that is less that 3%.
Ground The Drive
Ensure that drive grounding is properly connected as illustrated below. The
ground wire return between the motor and the drive must be terminated directly
to the drive PE terminal. Shielded cable is recommended but not always needed.
Refer to the product-specific documentation for requirements.
Protect The Drive
Ensure that the proper sized input fuses or circuit breakers are installed prior to
applying power to the drive.
Verify Your Installation
Ensure that all input and output power wiring is correctly wired and securely
fastened prior to applying power to the drive.
Unbalanced Percent = (Vmax - Vmin) x 100
(Vavg)
Vavg = (VAB + VBC + VCA)
3
Where: Vmax = maximum line-to-line RMS voltage
Vmin = minimum line-to-line RMS voltage
Where: VAB, VBC, VCA = line-to-line voltage
(OPTIONAL ENCLOSURE)
AC DRIVE
PE PE
R U
S V
T W
BUILDING GROUND POTENTIAL
CONDUIT
MOTOR FRAME
MOTOR
Connection to Drive Structure
or Optional Cabinet
Via Conduit Connector
Panel Ground Bus
Ground Bus Connected
Directly to Drive PE Terminal
Motor
Frame
Ground