Sequence of Functions
[losynf01-100611-01.tif, 1, en_US]
Figure 6-70
Sequence of Functions
Start
The synchronization stage must be started to check the closing conditions. The synchronization stage can be
started device-internally by the controller or externally, via binary input signals (see section 6.4.13 Interaction
with Control and External Triggering ).
At the start, the system checks whether there is a multiple selection by the synchronization stage (see section
Monitoring in chapter 6.4.4.1 Description). If this is the case, the process is terminated. After a successful
start, the indication In progress is cleared and the supervision time for the maximum duration of the
synchronization process (parameter Max.durat. sync.process is started. The system also checks
whether the voltages and frequencies are in the operating range (see section 6.4.4.1 Description). If this is not
the case, the closing conditions are not checked.
Checking the Closing Conditions, Closure
After starting, the parameterized closing conditions are checked depending on the operating mode selected
(see Chapter 6.4.8.1 Description to 6.4.12 Direct Close Command ). Every condition fulfilled is explicitly indi-
cated here. Conditions not fulfilled are also indicated. If all conditions are fulfilled, the synchronization stage
sets the indication All sync. conditio. OK. The indication is active until all conditions are fulfilled. The
further behavior for issuing the release for closing depends on the type of the stage (see Chapters
6.4.7.1 Description and 6.4.8.1 Description). The release is signaled via the Release close cmd. indica-
tion. This indication is active for 100 ms. With an internal start, the controller executes the actual closure,
depending on the starting source.
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 6.4.11.1 Description). The fulfilled conditions are
6.4.6
Control Functions
6.4 Synchronization Function
SIPROTEC 5, High-Voltage Bay Controller, Manual 375
C53000-G5040-C015-9, Edition 11.2017
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