Rockwell Automation Publication 520-UM001A-EN-E - February 2013 43
Installation/Wiring Chapter 1
• PowerFlex 525 drives are not intended to be used on public low-voltage
networks which supply domestic premises. Without additional mitigation,
radio frequency interference is expected if used on such a network. The
installer is responsible to take measures such as a supplementary line filter
and enclosure (see Connections and Grounding
on page 45) to prevent
interference, in addition to the installation requirements of this document.
• PowerFlex 525 drives generate harmonic current emissions on the AC
supply system. When operated on a public low-voltage network it is the
responsibility of the installer or user to ensure that applicable requirements
of the distribution network operator have been met. Consultation with the
network operator and Rockwell Automation may be necessary.
• If the optional NEMA 1 kit is not installed, the drive 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 motor cable should be kept as short as possible in order to avoid
electromagnetic emission as well as capacitive currents.
• Use of line filters in ungrounded systems is not recommended.
• In CE installations, input power must be a Balanced Wye with Center
Ground configuration for EMC compliance.
Installation Requirements Related to EN 61800-5-1 and the Low Voltage Directive
• 600V PowerFlex 525 drives can only be used on a “center grounded”
supply system for altitudes up to and including 2000 m (6562 ft).
• When used at altitudes above 2000 m (6562 ft) up to a maximum of
4800 m (15,748 ft), PowerFlex 525 drives of voltage classes up to 480V
may not be powered from a “corner-earthed” supply system in order to
maintain compliance with the CE LV Directive. See Derating Guidelines
for High Altitude on page 14.
• PowerFlex 525 drives produce leakage current in the protective earthing
conductor which exceeds 3.5 mA AC and/or 10 mA DC. The minimum
size of the protective earthing (grounding) conductor used in the
application must comply with local safety regulations for high protective
earthing conductor current equipment.
ATTENTION: NEMA/UL Open Type drives must either be installed in a
supplementary enclosure or equipped with a “NEMA Type 1 Kit” to be
CE compliant with respect to protection against electrical shock.
ATTENTION: PowerFlex 525 drives produce DC current in the protective
earthing conductor which may reduce the ability of RCD’s (residual
current-operated protective devices) or RCM’s (residual current-
operated monitoring devices) of type A or AC to provide protection for
other equipment in the installation. Where an RCD or RCM is used for
protection in case of direct or indirect contact, only an RCD or RCM of
Type B is allowed on the supply side of this product.
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