ABB ACS480, Руководство по оборудованию, Страница: 41 / 180

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 shows the minimum cross-sectional area of the protective conductor 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.
Minimum cross-sectional area of the corresponding
protective conductor
S
p
(mm
2
)
Cross-sectional area of the phase conductors
S (mm
2
)
S
1)
,
2)
S ≤ 16
16 16 < S ≤ 35
S/2 35 < S
1) Drive safety standard IEC/EN 61800-5-1:
• use a protective earth conductor with a cross-section of at least 10 mm
2
(8 AWG) Cu or 16 mm
2
(6 AWG) Al, or
• use a second protective earth conductor of the same cross-sectional area as the original protective earthing conductor,
or
• use a device which automatically disconnects the supply if the protective earth conductor breaks.
2) Drive safety standard IEC/EN 61800-5-1: If the protective earth conductor is separate (ie, it does not form part of the input
power cable or the input power cable enclosure), the cross section must be at least:
• 2.5 mm
2
(14 AWG) when the conductor is mechanically protected, or
• 4 mm
2
(12 AWG) when the conductor is not mechanically protected.
￭ Typical power cable sizes
See the technical data.
￭ Power cable types
Preferred power cable types
This section presents the preferred cable types. Make sure that the selected cable type also
complies with local/state/country electrical codes.
Use as motor cabling Use as input power cabling Cable type
Yes Yes
„
„
PE
Symmetrical shielded (or armored)
cable with three phase conductors
and concentric PE conductor as
shield (or armor)
Yes Yes
„
„
PE
Symmetrical shielded (or armored)
cable with three phase conductors
and symmetrically constructed PE
conductor and a shield (or armor)
Guidelines for planning the electrical installation 41