Operating instructions
Functions, monitoring, and protective functions
9.4 Extended functions
Drive converter cabinet units
346 Operating Instructions, 10/2008, A5E00288214A
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 reactor is used to de-couple the drive converter from the line supply - the uk value for the
reactor is 10 (± 2) %.
M
~
K 1 K 2
5HDFWRU
/LQHVXSSO\
&RQYHUWHUZLWK
9ROWDJH6HQVLQJ
0RGXOH960
3URWHFWLYHGHYLFH
Figure 9-9 Typical circuit diagram for bypass with synchronizer with degree of overlapping
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.
Parameterization
Once the bypass with synchronizer with degree of overlapping (p1260 = 1) function has
been activated, the following parameters must be set: