P44x/EN AP/Hb
MiCOM P40 Agile P442, P444
(AP) 5-
5.9.5 DDBs from Check Synchronism function used in the PSL
The following DDBs are associated with the the check synchronization logic in the PSL (see
P44x/EN PL).
Logic inputs used by the check synchronism logic:
• MCB/VTS Synchro,
• MCB/VTS Main,
are managed dynamically (regarding where the main VT are located:bus side or line side –
then the Csync ref is assigned to the other VT which is managed as the Csync ref)
Logic DDB outputs issued by the check sync logic
• Check Sync OK [Used with AR close in the relevant PSL – "AND" gate: [(AR
Close) & (CheckSync OK)]
• A/R Force Sync,
• V<Dead Line
• V>Live Line
• V<Dead Bus
• V>Live Bus
• Control No C/S
• Ext Chk Synch OK
WARNING: TO ENSURE THAT THE AUTORECLOSE COMMAND IS CONTROLLED
BY THE CHECK SYNCHRONISM CONDITIONS, THE ABOVE PSL
SHOULD BE SET.
(Different schemes can be created with internal AR & external CSync or internal Csync &
external AR)
Figure 106: Check sync psl logic
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