SCSWI
SELECTED
RES_EXT
+
IED
BI
BO
IED
BI
BO
OR
Other SCSWI in the bay
en05000118.vsd
IEC05000118 V2 EN-US
Figure 144: Application principles for reservation with external wiring
The solution in Figure 144 can also be realized over the station bus according to the
application example in Figure 145. The solutions in Figure 144 and Figure 145 do not have the
same high security compared to the solution in Figure 143, but instead have a higher
availability, since no acknowledgment is required.
SCSWI
SELECTED
RES_EXT
IED
IED
OR
Other SCWI in
the bay
Station bus
. . .
SPGAPC
IN
RESGRANT
IntlReceive
.
.
.
.
.
.
RESGRANT
IntlReceive
IEC05000178-3-en.vsd
IEC05000178 V3 EN-US
Figure 145: Application principle for an alternative reservation solution
12.3.7 Interaction between modules
M16626-3 v9
A typical bay with apparatus control function consists of a combination of logical nodes or
functions that are described here:
• The Switch controller (SCSWI) initializes all operations for one apparatus. It is the
command interface of the apparatus. It includes the position reporting as well as the
control of the position
• The Circuit breaker (SXCBR) is the process interface to the circuit breaker for the
apparatus control function.
• The Circuit switch (SXSWI) is the process interface to the disconnector or the earthing
switch for the apparatus control function.
• The Bay control (QCBAY) fulfils the bay-level functions for the apparatuses, such as
operator place selection and blockings for the complete bay.
• The Reservation (QCRSV) deals with the reservation function.
• The Protection trip logic (SMPPTRC) connects the "trip" outputs of one or more protection
functions to a common "trip" to be transmitted to SXCBR.
Section 12 1MRK 505 370-UEN D
Control
294 Busbar protection REB670
Application manual
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