Rockwell Automation Publication 750-IN001O-EN-P - October 2014 19
Prepare for Installation Chapter 2
• PowerFlex 750-Series 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 can be
necessary.
Installation Requirements Related to EN 61800-5-1 and the Low
Voltage Directive
Frame 1 Drives
• Voltage classes up to 480V PowerFlex 750-Series Frame 1 drives can only
be used on a “center grounded” supply system for altitudes up to and
including 2000 m (6562 ft).
Frame 2 and Larger Drives
• Voltage classes up to 690V PowerFlex 750-Series Frame 2 and larger drives
are compliant with the CE LV Directive when used on a “corner-earthed”
supply system and all other common 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 750-Series drives of voltage classes up to
480V cannot be powered from a “corner-earthed” supply system to
maintain compliance with the CE LV Directive. Altitude derating curves
are provided in the PowerFlex 750-Series AC Drives Technical Data,
publication 750-TD001
.
ATTENTION: PowerFlex 750-Series drives 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.
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