Bypass With Synchronization With Overlap - Siemens SINAMICS S120 Function Manual

Features
● Available for the vector control mode
● Available for induction motors without encoder
Commissioning the bypass function
The bypass function is part of the function module "technology controller" that can be
activated when using the commissioning wizard. Parameter r0108.16 indicates whether it
has been activated.
5.22.1

Bypass with synchronization with overlap

When "bypass with synchronization with overlap (p1260 = 1)" is activated, the motor is
transferred, synchronized to the line supply and is also retrieved again. During the
changeover, the two contactors K1 and K2 are simultaneously closed for a time (phase lock
synchronization).
A reactor is used to de-couple the drive converter from the line supply - the uk value for the
reactor is 10% +/- 2%.
Figure 5-25
Activation
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.
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Circuit example: Bypass with synchronization with overlap
Vector control
5.22 Bypass
251