Rockwell Automation 20T PowerFlex Diode Bus Supply - Manual (Page 25)

Installation/Wiring 1-13
PowerFlex Diode Bus Supply User Manual
Publication 20T-UM001D-EN-P
Harmonic Emissions
Electronic converters such as the Diode Bus Supply can cause conducted
low frequency disturbances (harmonic emissions) to the supply network.
The mandatory three-phase AC line reactors will substantially reduce
harmonic currents produced by the Bus Supply. However, the magnitude of
the harmonic currents and resulting harmonic voltages depends upon the
network impedance at the point where the unit is connected to the network.
Presently, there are no mandatory harmonic emission limits related to CE
compliance for equipment connected to private power networks. Upon
request, Rockwell Automation can provide information regarding harmonic
emissions from the Diode Bus Supply.
General Notes
• If the adhesive label is removed from the top of the Diode Bus Supply, it
must be installed in an enclosure with side openings less than 12.5 mm
(0.5 in.) and top openings less than 1.0 mm (0.04 in.) to maintain
compliance with the LV Directive.
• The DC bus cable to the drive(s) should be kept as short as possible to
avoid electromagnetic emission and capacitive currents. Therefore the
drive(s) should be located in the same cabinet as the Diode Bus Supply
or next to the cabinet with the Diode Bus Supply. If the connection leads
between DC bus and drive(s) are leaving the cabinet, shielded cables
must be used.
• Use of line filters in non-solid grounded systems is not recommended.
• The Diode Bus Supply with its inherent high frequency filtering satisfies
CE EMC emission limits for the industrial environment. If used in a
residential or domestic environment, it
may cause radio interference. The
user is required to take measures to prevent interference, in addition to
the essential requirements for CE compliance listed below, if necessary.
• Conformity of the drive with CE EMC requirements does not guarantee
an entire machine installation complies with CE EMC requirements.
Many factors can influence total machine/installation compliance.
Essential Requirements for CE Compliance
Conditions 1…5 listed below must be satisfied for the Diode Bus Supply to
meet the requirements of EN61800-3.
1. The Diode Bus Supply and drive must be PowerFlex type and CE
compatible.
2. The externally mounted Line Reactor must be connected to the line
input as shown in Figure 1.7 on page 1-12 .