Siemens SINAMICS S120 Function Manual page 161

A reactor is used to de-couple the drive converter from the line supply - the uk value for the
reactor is 10% +/- 2%.
Figure 4-25
Activating
The bypass function with synchronization with overlap (p1260 = 1) can only be activated
using a control signal. It cannot be activated using a speed threshold or a fault.
Example
The following parameters must be set after the bypass function with synchronization with
overlap (p1260 = 1) has been activated.
Table 4-8
p1266 =
p1267.0 = 1
p1267.1 = 0
P1269[0] =
P1269[1] =
p3800 = 1
p3802 = r1261.2
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Circuit example: Bypass with synchronization with overlap
Parameter setting for bypass function with synchronization with overlap
Parameter
Control signal setting when p1267.0 = 1
Bypass function is initiated by the control signal
Signal source to provide the feedback signal of contactor K1
Signal source for contactor K2 feedback
For synchronization, the internal voltages are used.
Synchronizer activation is triggered by the bypass function.
Description
Vector control
4.20 Bypass
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