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Apparatus control
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For synchrocheck, SWICON has two versions. One version (SWICONA) is for a syn-
chrocheck relay that checks the synchronization condition continuously and gives a sig-
nal on SY_OK if there is synchronism, see figure in "Synchrocheck with phasing" in
"Configurations". This is the normal application when the internal synchrocheck func-
tion 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 SY_RUN input is set to FIXD-ON.
If not the SY_OK input is used, it also must be set to FIXD-ON.
The other version (SWICONB) is used for an external synchrocheck or synchronization
relay. The close command from this relay is normally handled outside the control ter-
minal, see figure in "Synchrocheck with phasing" in "Configurations". At the close
command from the operator, COMCON activates the EXECUTE output and SWI-
CONB the SEL_CLOS and EXE_CLOS outputs. SWICONB has two inputs SY_RUN
and SY_FAIL, which need the status information of the synchronization sequence. The
SY_RUN signal can be connected from the synchronization relay, so it will be activated
when the synchronization relay is in progress and waiting for its close command. This
signal stops the command supervision given by the T_START time, so that the com-
mand output can be activated until the synchronization relay gives its command to close
the breaker. Also other timers in SWICONB are stopped when SY_RUN is activated.
If not the SY_RUN input is used, it must be set to FIXD-OFF.
The SY_FAIL must be activated if the synchrocheck/phasing does not reach synchro-
nism within a certain time. SY_FAIL resets the complete operation sequence.
The autoreclose function closes the breaker via an OR logic (OR with the same cyclicity
as the autoreclose function) with the normal close order from SWICON. For high-speed
autoreclose function used with external selection relays, the AR_SEL input is used to
select the apparatus without any checks of the selection conditions. To block the autore-
close function at the moment the apparatus is under operation, SWICON gives a
BLK_AR output.
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7B326(55
Allowed time for middle position. Supervises the time for position change from 01 ->
10 or 10 -> 01.
7B32/
Time parameter for pole discordance. Allowed time to have discrepancy between the
poles.
7B6(/
205
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