Power Cable Types For Limited Use; Not Allowed Power Cable Types; Motor Cable Shield - ABB ACS580-07 Hardware Manual

Symmetrical shielded cable with three phase conductors and a concentric PE conductor
as shield. A separate PE conductor is required if the shield does not meet the require-
ments of IEC 61800-5-1, see section
PE
PE
Symmetrical shielded cable with three phase conductors and symmetrically constructed
PE conductor, and a shield. The PE conductor must meet the requirements of IEC
61800-5-1, see section

Power cable types for limited use

PE
A four-conductor system (three phase conductors and a protective conductor on a cable
tray) is not allowed for motor cabling (allowed for input cabling).

Not allowed power cable types

Symmetrical shielded cable with individual shields for each phase conductor is not allowed
PE
on any cable size for input and motor cabling.
￭

Motor cable shield

If the motor cable shield is used as the sole protective earth conductor of the motor, make
sure that the conductivity of the shield is sufficient. See section
IEC 61800-5-1. To effectively suppress radiated and conducted radio-frequency emissions,
the cable shield conductivity must be at least 1/10 of the phase conductor conductivity. The
requirements are easily met with a copper or aluminum 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 or copper wire. The better and tighter the
shield, the lower the emission level and bearing currents.
1
1 Insulation jacket
2 Helix of copper tape or copper wire
3 Copper wire screen
4 Inner insulation
5 Cable core
Guidelines for planning the electrical installation 63
Motor cable shield (page
Motor cable shield (page 63).
2 3 4
63).
General rules (page 61), or
5