36 Planning the electrical installation
Selecting the power cables
General rules
Dimension 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. See Electrical power network specification on page 129 and Motor
output power (X1) on page 139 for the rated currents.
• The cable must be rated for at least 70 °C (US: 75 °C / 167 °F) maximum
permissible temperature of the conductor in continuous use.
• The conductivity of the PE conductor must be equal to that of the phase
conductor (same cross-sectional area).
• 600 V AC cable is accepted for up to 500 V AC.
• Refer to Technical data on page 154 for the EMC requirements.
A symmetrical shielded motor cable must be used to meet the EMC requirements of
the CE and C-Tick marks; see the following diagrams.
A four-conductor system is allowed for input cabling, but a shielded symmetrical
cable is recommended. Compared to a four-conductor system, the use of a
symmetrical shielded cable reduces electromagnetic emission of the whole drive
system as well as motor bearing currents and wear. The motor cable and its PE
pigtail (twisted shield) should be kept as short as possible in order to reduce
electromagnetic emission.
To Next Page
Loading...
Need help?
General
