Selecting the power cables
￭ General guidelines
Select the input power and motor cables according to local regulations.
• Current: Select a cable capable of carrying the maximum load current and suitable
for the prospective short-circuit provided by the supply network. The method of
installation and ambient temperature affect the cable current carrying capacity. Obey
local regulations and laws.
• Temperature: For an IEC installation, select a cable rated for at least 70 °C (158 °F)
maximum permissible temperature of conductor in continuous use.
For North America, select a cable rated for at least 75 °C (167 °F).
Important: For certain product types or option configurations higher temperature
rating may be required. See the technical data for details.
• Voltage: 600 V AC cable is accepted for up to 500 V AC. 750 V AC cable is accepted
for up to 600 V AC. 1000 V AC cable is accepted for up to 690 V AC.
To comply with the EMC requirements of the CE mark, use one of the preferred cable
types. See Preferred power cable types (page 96).
Symmetrical shielded cable reduces electromagnetic emission of the whole drive system
as well as the stress on motor insulation, bearing currents and wear.
Metal conduit reduces electromagnetic emission of the whole drive system.
￭ 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 cablingUse as input power cablingCable type
YesYes
Symmetrical shielded (or ar-
mored) cable with three phase
conductors and concentric PE
conductor as shield (or armor)
96 Guidelines for planning the electrical installation
To Next Page
Loading...
