Rockwell Automation 20B PowerFlex 700 Power Jumpers User Manual
Page 2
Publication 20B-IN021B-EN-P
2
PowerFlex 700 Power Jumpers
Table A Recommended Power Jumper Configurations
To connect or disconnect these devices, refer to pages
through
.
Important: Common mode capacitors are used to conform with the EMC
directives. Removing these devices may withdraw the associated
directive.
In addition, on an ungrounded distribution system where the line-to-ground
voltages on any phase could exceed 125% of the nominal line-to-line voltage, an
isolation transformer should be installed. See Wiring and Grounding Guidelines
for PWM AC Drives, publication DRIVES-IN001 for more information on
impedance grounded and ungrounded systems.
!
ATTENTION: Only qualified personnel familiar with adjustable
frequency AC drives and associated machinery should perform
maintenance/repair of the system. Failure to comply may 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 the User Manual for locations):
• +DC and -DC terminals of the Power Terminal Block
• +DC terminal of the Power Terminal 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.
Power Source Type
(1)
(1)
It is highly recommended to accurately determine the power source type and then configure appropriately.
MOV/Input
Filter Caps
(2)
(2)
When MOVs are disconnected, the power system must have its own transient protection to ensure known and
controlled voltages.
DC Bus
Common
Mode Caps
Benefits Of Correct Configuration
on Power Source Type
Solid Ground
• AC fed, solidly grounded
• DC fed from passive rectifier
which has an AC source and
solid ground
Connected
Connected
• UL compliance,
• Reduced electrical noise,
• Most stable operation,
• EMC compliance,
• Reduced voltage stress on
components and motor bearings
Non-Solid Ground
• AC fed ungrounded
• Impedance grounded
• High resistive ground
• B phase ground
• Regenerative unit such as
common DC bus supply & brake
• DC fed from an active converter
Disconnected
Disconnected
• Helps avoid severe equipment
damage when ground fault
occurs