ABB ACH480, Руководство по оборудованию

Страница: 49 / 214

Alternate power cable types
Use as motor cabling Use as input power cabling Cable type
Yes with phase conductor
smaller than 10 mm2 (8 AWG)
Cu, or motors up to 30 kW
(40 hp). Yes with phase conductor
smaller than 10 mm2 (8 AWG)
Cu.
PVC
Four-conductor cabling in PVC
conduit or jacket (three phase
conductors and PE)
Note: Shielded or armored
cable, or cabling in metal con-
duit is always recommended to
minimize radio frequency inter-
ference.
Yes with phase conductor
smaller than 10 mm2 (8 AWG)
Cu, or motors up to 30 kW
(40 hp) Yes
EMT
Four-conductor cabling in met-
al conduit (three phase con-
ductors and PE), eg, EMT, or
four-conductor armored cable
Yes with motors up to 100 kW
(135 hp). A potential equaliza-
tion between the frames of mo-
tor and driven equipment is re-
quired. Yes
Well-shielded (Al/Cu shield or
armor) four-conductor cable
(three phase conductors and
a PE)
No Yes
„
„
PE
WARNING!
If you use unshielded
single-core cables in an
IT network, make sure
that the non-conductive
outer sheath (jacket) of
the cables have good
contact with a properly
grounded conductive sur-
face. For example, install
the cables on a properly
grounded cable tray. Oth-
erwise voltage may be-
come present on the non-
conductive outer sheath
of the cables, and there
is even a risk of an elec-
tric shock.
A single-core cable system:
three phase conductors and
PE conductor on cable tray
L1
L3 L2
L2
L1 L3
L3
L2 L1
Preferable cable arrangement
to avoid voltage or current un-
balance between the phases
Guidelines for planning the electrical installation 49