Synchronizing - ABB REG650 Technical Manual

Section 11
Control
11.1.7.3
288

Synchronizing

When the function is set to OperationSynch = On the measuring will be performed.
The function compares the values for the bus and line voltage which is a
supervision that the voltages are both live. If both sides are live, the measured
values are compared with the set values for acceptable frequency, rate of change of
frequency, phase angle and voltage difference.
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 in the right moment including the set tBreaker time.
There is a phase angle release internally to block any incorrect closing pulses. At
operation the SYNOK output will be activated with a pulse tClosePulse and the
function reset. The function will also reset if the syncronizing conditions are not
fulfilled within the set tMaxSynch time. This prevents that the functions are, by
mistake, maintained in operation for a long time, waiting for conditions to be fulfilled.
The inputs BLOCK and BLKSYNCH are available for total block of the complete
function respective of the synchronizing part. TSTSYNCH will allow testing of the
function where the fulfilled conditions are connected to a separate output.
SESRSYN
OPERATION SYNCH
OFF
ON
TEST MODE
OFF
ON
STARTSYN
BLOCK
BLKSYNCH
OR
Voltage difference <
10% of UBase
Bus voltage > 80% of
UBase
Line voltage > 80% of
UBase
FreqDiffMax
FreqDiffMin
FreqRateChange
fBus&fLine ± 5 Hz
PhaseDiff < 15 deg
PhaseDiff=closing angle
IEC08000020 V3 EN
Figure 146: Simplified logic diagram for the synchronizing function
S
AND
R
AND
AND
AND
tClose
Pulse
AND
1MRK 502 034-UEN -
SYNPROGR
AND
SYNOK
OR
TSTSYNOK
OR
tMax
Synch
SYNFAIL
IEC08000020_3_en.vsd
Technical Manual