Bypass With Synchronization With Overlap (P1260 = 1) - Siemens SINAMICS S120 Function Manual

Extended Functions
Bypass (vector)
Commissioning the bypass function
The bypass function is part of the function module "technology controller" that can
be activated when using the commissioning Wizards. Parameter r0108.16 indi-
cates whether it has been activated.
4.25.1

Bypass with synchronization with overlap (p1260 = 1)

Description
When "bypass with synchronization with overlap (p1260 = 1)" is activated, then
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 %.
Network
Drive converter with
Voltage Sensing
Module (VSM10)
Fig. 4-30
4-278
Reactor
K1
M
~
Circuit example: Bypass with synchronization with overlap
Protective
device
K2
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition