OperationSC = On
OR
t
0-60 s
AND
AND
AND
AND
AND
AND
t
50 ms
UHighLineSC
UHighBusSC
UDiffSC
phaseAngleDifferenceValue
frequencyDifferenceValue
voltageDifferenceValue
1
1
1
AND
tSCA
PhaseDiffA
FreqDiffA
Note! Similar logic for Manual Synchrocheck.
PhDiff > 60°
PhDiff < 5°
AND
32 ms
t
AND
100 ms
invalidSelection
IEC07000114-6-en.vsdx
TSTAUTSY
AUTOSYOK
UOKSC
UDIFFSC
FRDIFFA
PHDIFFA
UDIFFME
FRDIFFME
PHDIFFME
INADVCLS
IEC07000114 V6 EN-US
Figure 143:
Simplified logic diagram for the auto synchrocheck function
Synchronizing
SEMOD171603-4 v12
When the function is set to
OperationSynch
=
On
the measuring will be performed.
The function will compare the values for the bus and line voltage with the set
values for
UHighBusSynch
and
UHighLineSynch
, which is a supervision that the
voltages are both live. Also the voltage difference is checked to be smaller than the
set value for
UDiffSynch
, which is a p.u value of set voltage base values. If both
sides are higher than the set values and the voltage difference between bus and line
is acceptable, the measured values are compared with the set values for acceptable
frequency
FreqDiffMax
and
FreqDiffMin
, rate of change of frequency
FreqRateChange
and phase angle
CloseAngleMax
.
The measured frequencies between the settings for the maximum and minimum
frequency will initiate the measuring and the evaluation of the angle change to
allow operation to be sent at the right moment including the set
tBreaker
time. The
Section 12
1MRK 505 394-UEN A
Control
310
Line differential protection RED650 2.2 IEC
Technical manual
Summary of Contents for RED650
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