Rockwell Automation 20A PowerFlex 70 Power Jumpers - Manual (Page 2)

Publication 20A-IN010B-EN-P
2 PowerFlex 70 Power Jumpers
Table A Recommended Power Jumper Configurations
To connect or disconnect these devices, refer to pages 4 and 5 .
Important: Common mode capacitors are used to conform with the EMC
directives. Removing these devices may withdraw the associated
directive.
!
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 terminal of the Power Terminal Block and the -DC test point
(Frames A…D) or the -DC terminal of the Power Terminal Block
(Frame E)
• +DC terminal of the Power Terminal Block and the chassis
• -DC test point (Frames A…D) or the -DC terminal of the Power
Terminal Block (Frame E) 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