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Apparatus control
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Connections between the apparatus control modules and the synchrocheck function can
be made either for the built-in synchrocheck module or for an external synchrocheck
relay, for example, type RASC. External synchronization equipment can also be con-
nected to the apparatus control modules. Figure 108 shows the connections for a syn-
chrocheck function that checks the synchrocheck condition continuously and gives a
signal on SY_OK if there is synchronism. This is the normal application when the built-
in synchrocheck function is used.
To close the breaker via the apparatus control function, SWICON can activate the
EXE_CLOS output at the activation of the SY_OK signal when the CLOSE and EXE-
CUTE inputs are already set and also when the SEL_CLOS output is set. The input
SY_RUN is set to FIXD-ON. Figure 108 also shows an example of how to bypass the
synchrocheck function by a command from the station HMI.
COMCON
EXECUTE
Timer
&
INPUT
MultCmdFunc
OUT14
SynchroCheck
MANOK
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Figure 109, figure 110, and figure 111, show three alternatives of configurations for the
SWICONB module when an external synchrocheck or synchronization relay is used.
For alternative 1 in figure 109, the synchronization starts when the line and busbar volt-
ages are connected to the synchrocheck relay. For alternative 2 in figure 110, the syn-
chrocheck relay continuously checks the synchronization condition. Alternative 2 can
CLOSE
FIXD_ON
ON
Bypass
synch
S
>1
R
SWICONA
CLOSE
EXECUTE
SEL_CLOS
&
EXE_CLOS
SY_RUN
SY_FAIL
SY_OK
To Event
function block
en02000710.vsd
&KDSWHU
&RQWURO
To
output
board
227
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