OR
AND
S
R
VDiffSynch
VHighBusSynch
VHighLineSynch
FreqDiffMax
FreqDiffMin
FreqRateChange
AND
t
50 ms
AND
AND
AND
AND
tClose
Pulse
OR
AND
OR
SYN1
STARTSYN
BLKSYNCH
SYNPROGR
SYNOK
SYNFAIL
tMax
Synch
TSTSYNOK
ANSI06000636-3-en.vsd
OPERATION SYNCH=ON
TEST MODE=ON
fBus&fLine ± 5Hz
Phase Diff < 15 deg
PhaseDiff=closing angle
FreqDiff
tBreaker
Close pulse
in advance
ANSI06000636 V3 EN-US
Figure 400: Simplified logic diagram for the synchronizing function
Energizing check
M14835-3 v11
Voltage values are measured in the IED and are available for evaluation by the Synchronism check
function.
The function measures voltages on the busbar and the line to verify whether they are live or dead.
This is done by comparing with the set values
VLiveBusEnerg
and
VDeadBusEnerg
for bus
energizing and
VLiveLineEnerg
and
VDeadLineEnerg
for line energizing.
The frequency on both sides of the circuit breaker is also measured. The frequencies must not
deviate from the rated frequency more than +/-5Hz.
The Energizing direction can be selected individually for the Manual and the Automatic functions
respectively. When the conditions are met the outputs AUTOENOK and MANENOK respectively will
be activated if the fuse supervision conditions are fulfilled. The output signal can be delayed
independently for MANENOK and AUTOENOK conditions. The Energizing direction can also be
selected by an integer input AENMODE respective MENMODE, which for example, can be
connected to a Binary to Integer function block (B16I). Integers supplied shall be 1=Off, 2=DLLB,
3=DBLL and 4= Both. Not connected input will mean that the setting is done from Parameter
Setting tool. The active position can be read on outputs MODEAEN resp MODEMEN. The modes
are 0=OFF, 1=DLLB, 2=DBLL and 3=Both.
The inputs BLOCK and BLKENERG are available for total block of the complete SESRSYN (25)
function respective block of the Energizing check function. TSTENERG will allow testing of the
function where the fulfilled conditions are connected to a separate test output.
1MRK 502 066-UUS B Section 14
Control
757
Technical manual
To Next Page
Loading...
