Siemens siprotec SJ62, Руководство пользователя

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2 Functions
283
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
2.19 Synchronism and Voltage Check 25 (7SJ64 only)
The synchronization function is only available for device 7SJ64. It has configuration
options for four different synchronization functions. The function and operation is de-
scribed in the following using the
SYNC Function group 1
. 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 synchronism check verifies that
the start does not endanger the stability of the power system.
Applications • Typical applications are, for example, the synchronism check of a feeder and a
busbar (see Figure 2-100) or the synchronism check of two busbars via bus coupler
(see Figure 2-101).
Prerequisites The synchronism check is only available for 7SJ64.
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 2-100), its
vector group can be adapted in the 7SJ64 relay so that external adaptors are not re-
quired.
Figure 2-100 Infeed