Rockwell Automation 21G PowerFlex 750-Series AC Drives User Manual
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Rockwell Automation Publication 750-IN001N-EN-P - April 2014
PowerFlex 750-Series AC Drives
Installation Requirements Related to EN 61800-3 and the EMC Directive
•
The drive must be earthed (grounded) as described in
.
•
Output power wiring to the motor must employ cable with a braided
shield providing 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
a. The cable shield must be clamped to a properly-installed “EMC plate”
for the drive. Kit number 20-750-EMC1-F
x.
or
b. The cable shield or conduit must terminate in a shielded connector
installed in a conduit plate or conduit box provided in the “NEMA
Type 1 Kit” for the drive (kit number 20-750-NEMA1-F
x).
Floor Mount Drive Frames 8 and larger: At the drive end of the motor
cable, terminate the shield at the PE Grounding Bar (See
•
At the motor end, the motor cable shield or conduit must terminate in a
shielded connector which must be properly installed in an earthed motor
wiring box attached to the motor. The motor wiring box cover must be
installed and earthed.
•
All control (I/O) and signal wiring to the drive must use cable with a
braided shield providing 75% or greater coverage, or the cables must be
housed in metal conduit, or equivalent shielding must be provided. When
shielded cable is used, the cable shield should be terminated with a low-
impedance connection to earth at only one end of the cable, preferably the
end where the receiver is located. When the cable shield is terminated at
the drive end, it may be terminated either by using a shielded connector in
conjunction with a conduit plate or conduit box, or the shield may be
clamped to an “EMC plate.”
•
Motor cabling must be separated from control and signal wiring wherever
possible.
•
Maximum motor cable length must not exceed the maximum length
indicated in
for compliance with radio frequency emission limits
for the specific standard and installation environment.
•
EMC cores must be applied to input power and motor cabling for some
models of the PowerFlex 750-Series drives as indicated in
.
•
The drive must be powered from an earthed supply system such as a TN or
TT system and the PE-A and PE-B jumpers in the drive must be installed
(see Drive Power Jumper Configuration starting on
•
IP00 and NEMA/UL Open Type Frame 8 and higher frames must be
installed in suitable supplementary EMC enclosures to achieve compliance
with EN 61800-3.