Siemens SINAMICS S120 Combi User Manual page 140

Motor Modules Booksize Compact as expansion axes
7.8 Technical data
Figure 7-18
Figure 7-19
At installation altitudes >2000 m, an insolating transformer must be used (see "System
overview/Derating as a function of the installation altitude and ambient temperature"). The
design of the secondary line supply system must be as follows:
● TN system with grounded star point (no grounded outer conductor)
● IT system
A reduction of the line supply voltage phase-phase is not necessary.
138
Output current as a function of the installation altitude
Current derating as a function of the output frequency
SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3