Siemens SIPROTEC 4 User Manual page 297

With AR
The automatic reclosing (AR) function can also interact with the synchrocheck function. They are linked via the
device control. The selection is made by parameterizing the automatic reclosing and synchrocheck function.
The AR parameters (7138 Internal SYNC) define which SYNC function group (SYNC FG) is used. The switch
to be used is defined in the selected function group. The switching object specified in the AR parameters
(7137 Cmd.via control) and the selected SYNC function group must be identical. If no SYNC function
group is entered in the AR parameters, the close command of the AR function is carried out asynchronously via
the switching object specified in the AR parameters. Equally, the CLOSE command
2851) allows only asynchronous switching. If, for example, circuit breaker Q0 is configured as object to be
switched synchronously, a CLOSE command of the AR function will address this breaker and assign it a CLOSE
command which will be processed by the control. As this breaker requires synchronization, the control
launches the synchrocheck function and awaits release. If the parameterized conditions of the respective
SYNC function group are satisfied, release is granted and the control issues the CLOSE command (see
Figure 2-127).
[anbindung-awe-an-synchronisierfunktion-260602-kn, 1, en_US]
Figure 2-127
With External Control
In addition, there is the possibility to activate the synchronization by external measuring requests via binary
inputs ( >25 Sync req. , >25 Start , >25 Stop ). If the start is effected via the pulse start signal ( >25
Start ), the corresponding stop signal ( >25 Stop ) must always be generated, too. After the synchronizing
function has completed the check, it issues a release message (
urement is finished as soon as the measurement request is reset via the binary input. In this case there is no
need to configure any control device to be synchronized.
[zusammenwirk-synchronisierf-mit-ext-anst2606-02-kn, 1, en_US]
Figure 2-128
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
Connection of the automatic reclosing function to the synchronization function
Interaction of synchronizing function and external control
2.21 Synchronization Function
79 Close (indication
25 CloseRelease see Figure
Functions
2-128). Meas-
297