Siemens Sinamics S120 Manual page 74

Line-side power components
3.4 Active Interface Modules, liquid-cooled
Figure 3-18 Connection example of liquid-cooled Active Interface Module, frame size JIL, valid for article numbers
6SL3305-7TE41-4AA5 and 6SL3305-7TG41-6AA5
NOTICE
Damage to the device through different phase sequence in the pre-charging and main
circuits
Different phase sequences in the pre-charging and main circuits can overload and destroy
the pre-charging resistors of the Active Interface Module during the brief overlap period,
where both contactors are simultaneously closed.
• Close the power cables in the pre-charging and main circuits with the same phase
74
sequence.
Liquid-cooled chassis power units
Manual, (GH7), 11/2016, 6SL3097-4AM00-0BP7