Switching to Dead Line/Busbar
If operating modes for switching to dead parts of an electrical power system are configured, the associated
conditions are also checked after the start (see chapter 8.4.10.1 Description). The fulfilled conditions are
signaled. An adjustable supervision time is started after the closure conditions are fulfilled (parameter CB
make time). If the conditions remain valid until expiry of the time, the function gives the release for closure
after expiry of the time.
Direct Close Command
If the Direct close command operation is active, the function instantaneously initiates the release for closure
after the successful start (see chapter 8.4.11 Direct Close Command ). A combination of direct close command
with other release conditions is not advisable, as these conditions are bypassed by the direct close command.
End of the Process
If the function is started via the device-internal controller or AREC, these functions also terminate the synchro-
nization process upon closure. The process is terminated via the corresponding binary signals in case of
external starting.
If the supervision time (Max.durat. sync.process parameter) has expired, the process is also completed
and the indication Max. time exceeded is issued. A renewed synchronization is only possible if the stage is
restarted.
Blocking Closure
You can use the input signal
>Block close command
to block the release signal for the closure (signal
Release close cmd.) as well as the closure itself. The measurement continues to operate during the
blocking. If the blocking is revoked and the release conditions are still fulfilled, the release is given for closure.
Control Functions
8.4 Synchronization Function
SIPROTEC 5, Overcurrent Protection, Manual 1141
C53000-G5040-C017-8, Edition 07.2017
To Next Page
Loading...
