Alternative Power Cable Types - ABB ACS 800-17 Hardware Manual

A four-conductor system is allowed for input cabling, but shielded symmetrical cable
is recommended. To operate as a protective conductor, the shield conductivity must
be as follows when the protective conductor is made of the same metal as the phase
conductors:
Cross-sectional area of the phase
conductors
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 screen) should be kept as short as
possible in order to reduce electromagnetic emission as well as capacitive current.

Alternative power cable types

Power cable types that can be used with the drive are represented below.
Recommended
Symmetrical shielded cable: three phase conductors
and a concentric or otherwise symmetrically
constructed PE conductor, and a shield
PE conductor
and shield
A four-conductor system:
three phase conductors
and a protective
conductor.
2
S (mm )
S < 16
16 < S < 36
35 < S
Shield
PE
PE
Not allowed for motor cables
Minimum cross-sectional area of the
corresponding protective conductor
2
S (mm )
p
S
16
S/2
A separate PE conductor is required if the conductivity
of the cable shield is < 50 % of the conductivity of the
phase conductor.
Not allowed for motor cables with phase
conductor cross section larger than 10 mm
(motors > 30 kW).
Planning the electrical installation
Shield
PE
Shield
2
51