Siemens SINAMICS S120 Combi Equipment Manual page 251

The following conditions for the conductors/cables should be used as basis:
● Ambient temperature 55 °C
● Limit conductor temperature, ≤ 70 °C for operation with the rated load current
● Cable length max.:
In addition, the conductors/cables should be routed so that
● max. 1 conductor pair, bundled and
● the 24 V conductors should be separately routed away from other cables and conductors
Table 12- 3 MCBs by core cross-section and temperature
Core cross-section
1.5 mm
2
2.5 mm
2
4 mm
2
6 mm
2
24 V busbar
The trip characteristic of the MCBs must be selected to match the loads to be protected and
the max. current provided by the power supply unit in the event of a short-circuit.
SINAMICS S120 Combi
Manual, Edition 05.2010, 6SL3097-4AV00-0BP0
– 10 m for the supply cables
– 30 m for signal cables
that could conduct the operating current.
Max. value up to 40 °C
10 A
16 A
25 A
32 A
20 A
Cabinet design and EMC
12.6 24 V DC supply
Max. value up to 55°C
6 A
10 A
16 A
20 A
20 A
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