Siemens SIPROTEC 6MD665, Manual

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2 Functions
54
6MD665 Manual
C53000-G1876-C103-3
to execute all switchgear interlocking checks and to state if switching is permitted
or not.
In additon to this, it is checked if maximally one synchronisation function (measuring
phase) is active.
– Control direction:
Control command = ON: Continue with synchronisation check.
Control command = OFF: Continue with control phase (no synchronisation
required).
– Synchronisation check:
Checks whether the control device concerned shall be switched on synchronised
or evaluation of the number of input messages
´!6\HIIµ
= ON.
– Analysis of the operating mode
Evaluation of the input indications of the selected block.
Table 2-5 Start conditions check phase, SYNC function module selection
Table 2-6 Start conditions check phase, operating mode analysis
• Measuring: This phase executes the synchronisation subfunction.
This phase is coordinated by means of input indications:
–
´!6\0HDVµ
, start/stop of measurement
–
´!6\GLU&2µ
, bypassing
–
´!6\EORFNµ
, block switching enable
Number of SYNC function
blocks including the control
device to be switched
Number of input messages
“>Sy1 eff.” = ON
Reaction
0 Irrelevant Unsynchronised control
device, continue with
control phase
≥
1 0 Unsynchronised switching,
continue with control phase
≥
1 1 Unambiguous allocation,
continue with operating
mode analysis and activated
block
>1 >1 Error, abort with BF (too
many blocks effective)
“Sync. Error” “Sync. CloseRel” Reaction
ON Irrelevant Abort with BF-
OFF ON Switching enable, continue with control
phase
OFF OFF Continue with Measuring phase, tripping
by: >SyMeasON