Disconnecting movs and common mode capacitors – Rockwell Automation 20B PowerFlex 700 Installation Instructions - Frames 0…6 User Manual
Page 43
Rockwell Automation Publication 20B-IN019E-EN-P - July 2013
43
PowerFlex 700 Adjustable Frequency AC Drive – Frames 0…6
Disconnecting MOVs and Common Mode Capacitors
The Powerflex 700 drive contains protective MOVs and Common Mode
Capacitors referenced to ground (see below). To guard against unstable operation
and/or damage, the drive must be properly configured as shown in
Table 9
on
page 44
.
Before proceeding, ensure that all power to the drive has been removed.
IMPORTANT
All PowerFlex 700 drives are shipped with the DC bus common mode capacitors
referenced to ground.
ATTENTION: Only qualified personnel familiar with adjustable frequency AC
drives and associated machinery must 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
29
through
30
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
DC+
DC–
MOV and AC EMI Capacitor Phase to Ground
Common Mode Capacitor to Ground
Jumper-Wire
Jumper-Wire