Siemens Sinamics G120P Operating Instructions Manual page 415

Bypass function depending on the speed (p1267.1 = 1)
With this function, switchover to line operation is realized corresponding to the following
diagram, if the setpoint lies above the bypass threshold.
If the setpoint falls below the bypass threshold, the motor is captured by the inverter and
operates in inverter operation.
Figure 7-30 Switchover behavior from inverter to line operation dependent on the speed
General properties of the bypass function
● The two motor contactors must be designed for switching under load.
● Contactor K2 must be designed for switching an inductive load.
● Contactors K1 and K2 must be mutually interlocked so that they cannot close at the same
time.
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
7.7 Application-specific functions
Functions
415