Monitoring & Control
PRS-7367 251
 Check Sync
Synchronizing the subsystem of synchro check, the main purpose of using the synchronizing
function is to check the operating values difference (Amplitude, frequency and angle of the
operated voltages) between two operated asynchronous electrical power systems. If the
synchronization condition is satisfied, then circuit breaker close command will issue to reconnect
the two judged electrical power system. The big advantage this process is to prevent power
system from any kind of trouble or damages.
The application of Synchronization module is:
ï‚· To reconnect different power generating systems
ï‚· To reconnect different operating distribution network or transmission lines
ï‚· In electrical power industry where precis and accurate automation is required
The synchronizing module provide a very accurate monitored date for synchronization operation of
circuit breaker.
 Close Loop
The main and important purpose of implementation of Synchro check module is in power system
to check the value of two unsynchronized systems for parallel operation. If the synchro check
condition is satisfied, then IED system will issue the reconnect command signal for CB close or
use auto reclosing function.
5.2.6 25SYN Settings
Table 5.2.6-1 25SYN settings
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