Siemens SINAMICS S150 Operating Instructions Manual page 84

Electrical installation
4.9 Other connections
Duty cycles
Figure 4-12
Threshold switch
The response threshold at which the braking unit is activated and the DC link voltage
generated during braking are specified in the following table.
Note
Since the braking energy is normally supplied back to the line and the braking chopper is
only to be activated in the event of a power failure, the default threshold value setting should
be retained rather than reduced.
The threshold switch must only be used when the cabinet unit is switched off and the DC
link capacitors are discharged.
84
Duty cycles for the braking resistors
WARNING
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A