Functions
2.19 Synchronization Function
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
317
Figure 2-122 Connection of V1 and V2 at device
Figure 2-123 Single-phase connection (phase-to-ground) to side V
1
For the device to perform the internal conversion to primary values, the primary rated transformer voltage of
the measured quantity V
2
must be entered via parameter 6x25VT Vn2, primary if a transformer is located
between the system parts to be synchronized.
Asynchronous Conditions
The synchronizing function 7SJ64 can issue a close command also for asynchronous power systems such that,
considering the circuit breaker operating time (address 6x20), the power systems are coupled when the phases
are equal.
Parameters 6x30dV ASYN V2>V1 and 6x31dV ASYN V2<V1 can be set to adjust the permissible voltage
differences asymmetrically.
Parameters 6x32 df ASYN f2>f1 and 6x33 df ASYN f2<f1 limit the operating range for asynchronous
switching. The availability of two parameters enables an asymmetrical release to be set.
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