Siemens SINAMICS S120 Combi Equipment Manual page 261

Example for dimensioning a power cable
Boundary conditions:
Module: S120 Combi 4 axes Power Module with 20 kW infeed
Rated input current at 400 V
Ambient temperature: 45°C
Installation type: B2
Calculation/dimensioning:
With installation type B2 and a rated input current of 34 A
current-carrying capacity, a cable cross-section of 10 mm
With a derating factor of 0.91 for 45°C ambient temperature, the current-carrying capacity of
the selected power cable decreases to 36.4 A.
Result:
Under the given boundary conditions, a power cable with a cross-section of 10 mm
used.
SINAMICS S120 Combi
Manual, Edition 05.2010, 6SL3097-4AV00-0BP0
: 34 A (from the technical data)
AC
Cabinet design and EMC
12.7 Cable shielding and routing
, from the table showing the
AC
is obtained.
2
can be
2
261