Siemens SINAMICS S120 Equipment Manual page 135

Figure 5-4 Connection example, Basic Line Module, frame size GD
NOTICE
Damage to the device due to different phase sequence in the precharging and main circuits
During the brief overlap period where both contactors are simultaneously closed, the
precharging resistors of the Basic Line Module could be overloaded and destroyed due to
different phase sequences in the precharging and main circuits.
• Connect the power cables to the precharging and main circuits with the same phase
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9
sequence.
Line Modules
5.2 Basic Line Modules
133