Eaton PowerXL DG1 - International EMC Protection Cable Requirements; Figure 35. Cable Description; Table 39. 1 St Environment 2 Nd Environment EMC Levels; Table 40. Motor Power Cable EMC Guidelines

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Chapter 7—EMC installation
POWERXL SERIES VFD MN040002EN—February 2018 www.eaton.com
International EMC protection cable requirements
The screened cables between the variable frequency drive
and the motor should be as short as possible.
•
Connect the screening, on both sides and across a large
area (360° overlap), to the protective earth (PE). The power
screening protective earth (PES) connection should be in
the immediate proximity of the variable frequency drive
and directly on the motor terminal box
•
Prevent the screening from becoming unbraided, e.g.,
by pushing the opened plastic sheath over the end of
the screening or with a rubber grommet on the end of
the screening. As an alternative, in addition to a broad
area cable clip, you can also twist the shielding braid at
the end and connect to protective ground with a cable
clip. To prevent EMC disturbance, this twisted shielding
connection should be made as short as possible
•
Screened three- or four-wire cable is recommended for
the motor cables. The green/yellow line of a four-wire
cable connects the protective ground connections
from the motor and the variable frequency drive and
therefore minimizes the equalizing current loads on the
shieldingbraid
•
If there are additional subassemblies in a motor feeder
(such as motor contactors, overload relays, motor reactor,
sinusoidal filters or terminals), the shielding of the motor
cable can be interrupted close to these subassemblies
and connected to the mounting plate (PES) with a large
area connection
Free or non-screened connection cables should not be any
longer than about 300 mm.
Table 39. 1st Environment 2nd environment EMC levels
according to EN 61800-3 (2004)

Cable Type Category C2 Category C3 Category C4

Line voltage/mains 1 1 1
Motor cable 3

22
Control cable 4 4 4
otes: N  For EMC Class 2 requirements on FR0 PowerXL
Series drive, use provided ferrite core with input
wires going through it twice, so there is a loop
onthe core.
 For installations in IT systems, it is necessary
to modify the EMC protection to EMC level C4.
Seethe following page for the procedure.
 360° earthing of the shield with cable glands in
motor end needed for EMC Level C2. Seethe
following page for the procedure.
Table 40. Motor power cable EMC guidelines
Item Directive
Product IEC 61800-2
Safety UL 508C, IEC/EN 61800-5-1
EMC (at default
settings)
Immunity (EMS): IEC/EN 61800-3, 2nd environment
Radiated and Conducted emissions (EMI): IEC/EN 61800-3
230/480V Series:
Category C1: is possible with external filter connected to
drive. Please consult factory
Category C2: with internal filter maximum of 10 m motor
cable length (FR0: This is obtained with 2 turns
on a ferrite core and using metal ground plate)
Category C3: with internal filter maximum of 50 m motor
cable length (FR0: This is obtained with no ferrite core and
metal plate)
575V Series:
Category C3: with internal filter maximum of 10 m motor
cable length
Table 41. Cable categories
Cable
category
Description
(All cables are rated for the specific operating voltage)
1 Intended for fixed installation
2 Symmetrical power cable equipped with a concentric protection
wire.
3 Symmetrical power cable with compact low-impedance shield.
Recommended cable transfer impedance of 1–30 MHz max. See
figure below.
4 Screened cable equipped with compact low-impedance shield
Figure 35. Cable description
PE Conductor
and Shield
Shield
PE Conductor