Disconnecting movs – Rockwell Automation 20D PowerFlex 700 Installation Instructions - Frames 7…10 User Manual
Page 46
46
Rockwell Automation Publication 20B-IN014H-EN-P - June 2013
PowerFlex 700 Adjustable Frequency AC Drive – Frames 7…10
Disconnecting MOVs
The PowerFlex 700 drive contains protective MOVs referenced to ground (see
below). To guard against unstable operation and/or damage, the drive must be
properly configured as shown in
.
See Wiring and Grounding Guidelines for Pulse Width Modulated (PWM) AC
Drives, publicatio
e information on impedance
grounded and ungrounded systems.
Before proceeding, ensure that all power to the drive has been removed.
ATTENTION: Allow only qualified personnel familiar with adjustable frequency
AC drives and associated machinery to perform maintenance/repair of the
system. Failure to comply can result in personal injury and/or equipment
damage.
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the
bus capacitors has discharged before performing any work on the drive.
Measure the DC bus voltage at the following points (refer to pages
for locations):
• +DC and -DC terminals of the Power Terminal Block
• +DC terminal of the Power Block and the chassis
• -DC terminal of the Power Terminal Block and the chassis
The voltage must be zero for all three measurements.
ATTENTION: The following information is merely a guide for proper
installation. Rockwell Automation cannot assume responsibility for the
compliance or the noncompliance to any code, national, local or otherwise for
the proper installation of this drive or associated equipment. A hazard of
personal injury and/or equipment damage exists if codes are ignored during
installation.
R/L1
S/L2
T/L3
MOV and AC EMI Capacitor Phase to Ground
Jumper-Wire