Selecting The Power Cables; General Rules - ABB ACS580-01 Hardware Manual

72 Planning the electrical installation

Selecting the power cables



General rules

Select the input power and motor cables according to local regulations:
• Select a cable capable of carrying the drive nominal current. See section
(page 160) for the rated currents.
• Select a cable rated for at least 70 °C maximum permissible temperature of
conductor in continuous use. For US, see
• The conductivity of the PE conductor must be sufficient, see the table on page 72.
• 600 V AC cable is accepted for up to 500 V AC.
To comply with the EMC requirements of the CE mark, use one of the approved cable
types in section Recommended power cable types
Symmetrical shielded cable reduces electromagnetic emission of the whole drive
system as well as the stress on motor insulation, bearing currents and wear.
The protective conductor must always have an adequate conductivity.
Unless local wiring regulations state otherwise, the cross-sectional area of the
protective conductor must agree with the conditions that require automatic
disconnection of the supply required in 411.3.2. of IEC 60364-4-41:2005 and be
capable of withstanding the prospective fault current during the disconnection time of
the protective device.
The cross-sectional area of the protective conductor can either be selected from the
table below or calculated according to 543.1 of IEC 60364-5-54.
This table below shows the minimum cross-sectional area related to the phase
conductor size according to IEC 61800-5-1 when the phase conductor and the
protective conductor are made of the same metal. If this is not so, the cross-sectional
area of the protective earthing conductor shall be determined in a manner which
produces a conductance equivalent to that which results from the application of this
table.
Cross-sectional area of the phase
conductors
S (mm
16 < S < 35
Note: See the IEC/EN 61800-5-1 requirement on grounding in the Note on page 18.
2
)
S < 16
35 < S
Additional US requirements,
on page 74.
Minimum cross-sectional area of the
corresponding protective conductor
S (mm
p
S
16
S/2
Ratings
page 75.
2
)