Siemens SINAMICS S120 Manual page 87

Figure 4-15 Connection example Active Interface Module, frame sizes HI / JI
NOTICE
Damage to the devices as a result of excessively long switching times of the bypass
contactor
When using a bypass contactor with excessively long switching times (maximum 500 ms),
the required overlap phase is not guaranteed, where both contactors are simultaneously
pulled-in. As a consequence, the Active Interface Module can be overloaded and destroyed.
• Only use Siemens bypass contactors; the associated data are provided in the technical
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 Active Interface 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
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3
data.
sequence.
Line-side power components
4.6 Active Interface Modules
85