Functions
2.19 Synchronization Function
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
305
2.19
Synchronization Function
The synchronization function of 7SJ64 provides configuration options for four individual synchronization func-
tions. 7SJ62 only provides one function group for the synchronization check. The function and mode of opera-
tional according to
SYNC Function group 1
is described as follows. The same applies to function groups
2 to 4.
2.19.1
SYNC Function group 1
When connecting two sections of a power system, the synchrocheck verifies that the switching does not en-
danger the stability of the power system.
Applications
• Typical applications are, for example, the synchronism check of a feeder and a busbar (see Figure 2-116)
or the synchronism check of two busbars via bus coupler (see Figure 2-117).
Prerequisites
In 7SJ62 only one SYNC function group exists. Furthermore, only the operation mode
SYNCHROCHECK
is avail-
able for 7SJ62.
2.19.1.1 General
For comparing the two voltages the synchronism check uses the reference voltage V
1
and an additional voltage
to be connected V
2
.
If a transformer is connected between the two voltage transformers (Figure 2-116), its vector group can be
adapted in the 7SJ62/64 relay so that external adaptors are not required.
Figure 2-116
Infeed
www
. ElectricalPartManuals
. com
