ABB REC 561, User Manual

Page: 327 / 643

ABB Network Partner AB
Apparatus control
Version 1.0-00
1MRK 580 150-XEN
Page 6 - 42
4.2.8 Synchro-check
Connections between the apparatus control modules and the synchro-
check function can be made either for the built-in synchro-check module
or for an external synchro-check relay, for example, type RASC. External
synchronising equipment can also be connected to the apparatus control
modules. Fig. 28 shows the connections for a synchro-check function that
checks the synchronisation condition continuously and gives a signal on
SY_OK if there is synchronism. This is the normal application when the
built-in synchro-check function is used. To close the breaker, SWICON
can activate the EXE_CLOS output at the activation of the SY_OK signal
when the CLOSE and EXECUTE inputs are already set and also when the
SEL_CLOS output is set. The input SY_RUN is set to FIXD-ON. Fig. 28
also shows an example of how to bypass the synchro-check function by a
command from the station MMI.
Fig. 28 Connections between the built-in synchro-check module and
the apparatus control modules
Fig. 29, Fig. 30, and Fig. 31, show three alternatives of configurations for
the SWICONB module when an external synchro-check or synchronising
relay is used. For alternative 1 in Fig. 29, the synchronising starts when
the line and busbar voltages are connected to the synchro-check relay. For
alternative 2 in Fig. 30, the synchro-check relay continuously checks the
synchronisation condition. Alternative 2 can also use the solution in Fig.
28 if the close command from the synchro-check relay is connected via a
binary input to the SY_OK input on SWICONA. Alternative 3 in Fig. 31
shows the connection to an external synchronising equipment, for exam-
ple, type RES 010.
SWICONA
SY_RUN
SY_FAIL
SY_OK
&
SEL_CLOS
EXE_CLOS
Timer
ON
INPUT
FIXD_ON
SynchroCheck
MANOK
To
&
COMCON
CLOSE
EXECUTE
CLOSE
EXECUTE
MultCmdFunc
OUT14
S
R
≥1
output
board
Bypass
synch-check
To Event
function block
(X80150-28)