Synchronizing - ABB REG650 Technical Manual

1MRK 502 048-UEN A
12.1.7.3
Technical manual
OperationSC = On
TSTSC
BLKSC
OR
BLOCK
UDiffSC
Bus voltage >80%
of GblBaseSelBus
Line voltage >80%
of GblBaseSelLine
FreqDiffA
PhaseDiffA
voltageDifferenceValue
frequencyDifferenceValue
phaseAngleDifferenceValue
IEC08000018 V3 EN
Figure 164: Simplified logic diagram for the Auto Synchrocheck function

Synchronizing

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 internally preset
values that are set to be 80% of the set UBase selected for GlbBaseSelBus and
GlbBaseSelLine, which is a supervision that the voltages are both live. Also the
voltage difference is checked to be smaller than the internally preset value 0.10, which
is a p.u value of set voltage base values. If both sides are higher than the preset values
and the voltage difference between bus and line is acceptable, the measured values are
also compared with the set values for acceptable frequency FreqDiffMax and
FreqDiffMin, rate of change of frequency FreqRateChange and phase angle, which
has to be smaller than the internally preset value of 15 degrees.
Note! Similar logic for Manual Synchrocheck.
0-60 s
AND
t
tSCA
50 ms
AND
t
AND
AND
PhaseDiff > 60°
PhaseDiff < 5°
Section 12
AND
AND
AND
AND
1
1
1
100 ms
80 ms
t AND
IEC08000018_3_en.vsd
Control
AUTOSYOK
UOKSC
UDIFFSC
FRDIFFA
PHDIFFA
UDIFFME
FRDIFFME
INADVCLS
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