24 Rockwell Automation Publication 750-IN001P-EN-P - April 2017
Chapter 2 Prepare for Installation
All Drive Frames
Drives that are provided in the IP54, NEMA/UL Type 12 enclosure are
compliant with the CE LV Directive when installed in pollution degree 1…4
environments. All other enclosure types must be installed in a pollution degree
1 or 2 environment to be compliant with the CE LV Directive.
Characteristics of the different pollution degree ratings are provided in the
PowerFlex 750-Series AC Drives Technical Data, publication 750-TD001
.
PowerFlex 750-Series drives 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.
Installation Requirements Related to EN 61800-3 and the EMC
Directive
This section lists installation requirements that are related to EN 61800-3 and
the EMC Directive:
• The drive must be earthed (grounded) as described in Power Wiring on
page 153.
• Output power wiring to the motor must use cable with a braided shield
that provides 75% or greater coverage, or the cables must be housed in
metal conduit, or equivalent shielding must be provided. Continuous
shielding must be provided from the drive enclosure to the motor
enclosure. Both ends of the motor cable shield (or conduit) must
terminate with a low-impedance connection to earth.
Wall Mount Drive Frames 1…7: At the drive end of the motor cable,
either
– The cable shield must be clamped to a properly installed ‘EMC plate’
for the drive. Kit catalog number 20-750-EMCx-Fx (where Fx is the
frame size of the drive). See PowerFlex 750-Series EMC Plate and
Core(s) – Frames 1…7, publication 750-IN006
, for details.
or
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 from 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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