Interaction with Control, Automatic Reclosing (AREC), and External Triggering
With Control
The control and synchronization function are always located in a function group Circuit breaker. The control
and also the synchronization function always operate with the circuit breaker, which is linked to the function
group Circuit breaker.
As soon as the synchronization function is in the function group Circuit breaker, the circuit breaker is subject
to compulsory synchronization. If all synchronization stages are deactivated, the circuit breaker cannot be acti-
vated via the control, as no release can be generated for the closure. The circuit breaker is no longer subject to
compulsory synchronization after deletion of the synchronization function. Closure without synchronization is
then possible via the control.
If closure is to be synchronized via the control, the control automatically generates an internal signal which
starts the synchronization function. The functional sequence is described in chapter 8.4.6 Sequence of Func-
tions. After fulfilling all closing conditions, the synchronization sends a release signal to the control, which
closes the circuit breaker and then stops and synchronization function.
[losynaw1-310111-01.tif, 1, en_US]
Figure 8-72 Interaction of the Control with the Synchronization Function
With Automatic Reclosing
The automatic reclosing mechanism (AREC) can also work with the synchronization function. Both functions
are always located in a function group Circuit breaker. Consequently the AREC and synchronization function
always work with the circuit breaker that is linked to the function group Circuit breaker.
You must select a synchronization stage via settings within the AREC so that closure is synchronized by the
AREC. The tests for the synchronization stage are used for the closure by the AREC. If no synchronization stage
is selected, the AREC then activates without synchronization.
If closure is to be synchronized via the AREC, the AREC automatically generates an internal signal which starts
the synchronization function. The functional sequence is described in chapter 8.4.6 Sequence of Functions.
After fulfilling all closing conditions, the synchronization sends a release signal to the AREC, which closes the
circuit breaker and then stops and synchronization function.
8.4.12
Control Functions
8.4 Synchronization Function
1158 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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