Ddbs From Check Synchronism Function Used In The Psl; Check Sync Psl Logic - GE MiCOM P40 Agile Technical Manual

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Application Notes

MiCOM P40 Agile P442, P444

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

(Different schemes can be created with internal AR & external CSync or internal Csync &

external AR)

Figure 106: Check sync psl logic

TO ENSURE THAT THE AUTORECLOSE COMMAND IS CONTROLLED

BY THE CHECK SYNCHRONISM CONDITIONS, THE ABOVE PSL

SHOULD BE SET.

P44x/EN AP/Hb6