Alternative Power Cable Types; Motor Cable Shield - ABB ACS800-17LC Hardware Manual

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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
Not allowed: Symmetrical cable with individual shields
for each phase conductor
Not allowed for motor cabling: A four-conductor
system: three phase conductors and a protective
conductor.
PE

Motor cable shield

To effectively suppress radiated and conducted radio-frequency emissions, the
shield conductivity must be at least 1/10 of the phase conductor conductivity. The
requirements are easily met with a copper or aluminium shield. The minimum
requirement of the motor cable shield of the drive is shown below. It consists of a
concentric layer of copper wires with an open helix of copper tape. The better and
tighter the shield, the lower the emission level and the bearing currents.
Planning the electrical installation
PE conductor
and shield
Shield
PE
Copper wire screen
Insulation jacket
A separate PE conductor is required if
the conductivity of the cable shield is <
50 % of the conductivity of the phase
conductor.
Shield
PE
Shield
Helix of copper tape
Shield
PE
Inner insulation
Cable core