Functions
2.7 SYNCHROCHECK 25
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010
90
Figure 2-22 Cross coupling
The synchrocheck function 7RW80 interacts with the control function. It is also possible to employ an external
automatic reclosing system. In such a case signal exchange between the devices is accomplished via binary
inputs and outputs.
The release command for closing under satisfied synchronism conditions can be deactivated via parameter
6113 25 Synchron. For special applications, the deactivated closing release can, however, be activated via
a binary input („>25 synchr.“) (see „De-energized Switching“).
2.7.2 Functional Sequence
Validity Check of the Configuration
Already during startup of the device, a validation check of the configuration is performed. If there is a fault, the
message „25 Set-Error“ is output. after a measurement request there is a condition which is not plausible,
the message „25 Sync. Error“ is output. The measurement is then not started.
Concerning the configuration, it is also checked if the substation parameter 213 is set to Vab, Vbc, VSyn or
Vph-g, VSyn. Furthermore, specific thresholds and settings of the function group are checked. If there is a
condition which is not plausible, the error message „25 Set-Error“ is output additionally. Please ensure in
this case that address 6106 (threshold V1, V2 energized) is smaller than address 6103 (lower voltage limit
Vmin). The synchrocheck function cannot be controlled via a binary input.
SYNC Error
The synchronization is not started if a voltage transformer failure (m.c.b. tripping) is communicated to the
device via the binary input 6509 „>FAIL:FEEDER VT“ or 6510 „>FAIL: BUS VT“. The message „25
Sync. Error“ is output. In this case, the synchronization can be controlled directly via a binary input.
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