ABB REG650 Technical Manual page 293

1MRK 502 034-UEN -
Technical Manual
Two sets of settings for frequency difference and phase angle difference are
available and used for the manual closing and autoreclose functions respectively, as
required.
The inputs BLOCK and BLKSC are available for total block of the complete
Synchrocheck function and block of the Synchrocheck function respectively. Input
TSTSC will allow testing of the function where the fulfilled conditions are
connected to a separate test output.
The outputs MANSYOK and AUTOSYOK are activated when the actual measured
conditions match the set conditions for the respective output. The output signal can
be delayed independently for MANSYOK and AUTOSYOK conditions.
A number of outputs are available as information about fulfilled checking
conditions. UOKSC shows that the voltages are high, UDIFFSC, FRDIFFA,
FRDIFFM, PHDIFFA, PHDIFFM shows when the voltage difference, frequency
difference and phase angle difference conditions are met.
OperationSC = On
TSTSC
BLKSC
OR
BLOCK
UDiffSC
Bus voltage >80% of
Ubase
Line voltage >80% of
Ubase
FreqDiffA
PhaseDiffA
voltageDifferenceValue
frequencyDifferenceValue
phaseAngleDifferenceValue
IEC08000018 V2 EN
Figure 145: Simplified logic diagram for the Synchrocheck function
Note! Similar logic for Manual Synchrocheck.
0-60 s
AND
t
tSCA
50 ms
AND
t
AND
Section 11
AND
AND
AND
AND
1
1
1
IEC08000018_2_en.vsd
Control
AUTOSYOK
UOKSC
UDIFFSC
FRDIFFA
PHDIFFA
UDIFFME
FRDIFFME
287