ABB ACL30, User Manual

Page: 49 / 360

Planning the electrical installation 49
Selecting the power cables

General rules
Select the input power and motor cables according to local regulations:
• The input power and the motor cables must be able to carry the corresponding
load currents. For rated currents, see Drive specifications on page 319 .
• The cable must be rated for at least 70
°
C (158
°
F) maximum permissible
temperature of conductor in continuous use. For the US, see Additional US
requirements on page 52 .
• The conductivity of the PE conductor must be sufficient, see the table on page 49 .
• A 600 V AC cable is accepted for up to 500 V AC.
To comply with the EMC requirements of the CE mark, use an approved cable type in
Recommended power cable types on page 51 .
Use symmetrical shielded cable to reduce the following properties:
• electromagnetic emission of the drive system
• stress on motor insulation
• bearing currents
• general drive wear.

Sufficient conductivity of the protective conductor
The protective conductor must always have an adequate conductivity. The table
below shows the minimum cross-sectional area related to the phase conductor size
according to IEC 61439-1 when the phase conductor and the protective conductor
are made of the same metal.
Note: See the IEC/EN 61800-5-1 requirement on grounding (page 17 ).
Cross-sectional area of the phase
conductors S (mm
2
)
Minimum cross-sectional area of the
corresponding protective conductor S
p
(mm
2
)
S < 16 S
16 < S < 35 16
35 < S S/2