Bypass With Synchronizer With Degree Of Overlapping (P1260 = 1) - Siemens SINAMICS S150 Operating Instructions Manual

Functions, monitoring, and protective functions
9.4 Extended functions
9.4.2.1

Bypass with synchronizer with degree of overlapping (p1260 = 1)

Description
When "Bypass with synchronizer with degree of overlapping (p1260 = 1)" is activated, the
synchronized motor is transferred to the supply and retrieved again. During the changeover,
both contactors K1 and K2 are closed at the same time for a period (phase lock
synchronization).
A restrictor is used to disconnect the converter and supply voltage. The uk value for the
restrictor is 10% ± 2%.
Figure 9-9
Activation
The function with synchronizer with degree of overlapping (p1260 = 1) function can only be
activated using a control signal. It cannot be activated using a speed threshold or a fault.
342
K 1
M
~
Typical circuit diagram for bypass with synchronizer with degree of overlapping
K 2
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A