Selecting The Power Cables; General Rules; Alternative Power Cable Types - ABB ACSM1 Hardware Manual

Selecting the power cables

General rules

Dimension the supply (input power) and motor cables according to local
regulations.
• The cable must be able to carry the drive load current. See the chapter
data
• The cable must be rated for at least 70
permissible temperature of conductor in continuous use.
• The conductivity of the PE conductor must be equal to that of a phase conductor
(ie. same cross-sectional area).
• 600 VAC cable is accepted for up to 500 VAC.
• Refer to the chapter
Symmetrical shielded motor cable must be used (see the figure below) to meet the
EMC requirements of the CE and C-tick marks.
A four-conductor system is allowed for input cabling, but shielded symmetrical cable
is recommended. Compared to a four-conductor system, the use of symmetrical
shielded cable reduces electromagnetic emission of the whole drive system as well
as motor bearing currents and wear.
The motor cable and its PE pigtail (twisted shield) should be kept as short as
possible in order to reduce electromagnetic emission.

Alternative power cable types

Power cable types that can be used with the drive are represented below.
(also recommended for supply cabling)
Symmetrical shielded cable: three phase conductors and
a concentric or otherwise symmetrically constructed PE
conductor, and a shield
PE conductor
and shield
Allowed for supply cabling
A four-conductor system: three phase conductors and
a protective conductor.
for the rated currents.
Technical data
Motor cable
Shield
PE
°
C (US: 75 °C [167 °F]) maximum
for EMC requirements.
Note: A separate PE conductor is required if the
conductivity of the cable shield is not sufficient for the
purpose.
PE
Planning the electrical installation
41
Technical
Shield
PE
Shield
PE