28 Rockwell Automation Publication 750-IN100B-EN-P - July 2017
Chapter 3 Prepare for Installation
• PowerFlex 755T products 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 can
be necessary.
Installation Requirements Related to EN 61800-5-1 and the Low
Voltage Directive
• Voltage classes up to 690V PowerFlex 755T products are compliant with
the CE LVD when used on a ‘corner-earthed’ supply system and all
other common grounded supply systems 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 755T products of voltage classes up to
480V cannot be powered from a ‘corner-earthed’ supply system to
maintain compliance with the CE LVD. Altitude derating curves are
provided in the PowerFlex 750-Series Products with TotalFORCE
Control Technical Data, publication 750-TD100
.
• Drives that are provided in the IP54, UL Type 12 enclosure are
compliant with the CE LVD when installed in pollution degree 1…4
environments where no gaseous contaminants are present. All other
enclosure types must be installed in a pollution degree 1 or 2
environment to be compliant with the CE LVD. Characteristics of the
different pollution degree ratings are provided in the PowerFlex 750-
Series Products with TotalFORCE Control Technical Data, publication
750-TD100
.
• PowerFlex 755T products produce leakage current in the protective
earthing conductor that exceeds 3.5 mA AC and/or 10 mA DC. The
minimum size of the protective earthing (grounding) conductor that is
used in the application must comply with local safety regulations for
high-protective earthing conductor current equipment.
ATTENTION: PowerFlex 755T products produce DC current in the
protective earthing conductor which can reduce the ability of RCDs
(residual current-operated protective devices) or RCMs (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.
IMPORTANT PowerFlex 755T products meet Performance Criteria ‘C’ as defined in
Table 1 of IEC 61800-3. When exposed to individual order harmonics
per Table 24 of IEC 61800-3 (second environment) the drive will
shutdown in a safe condition.
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