ABB RET670 - Interaction between Modules

The solution in figure 235 can also be realized over the station bus according to the
application example in figure 236. The solutions in figure 235 and figure 236 do not
have the same high security compared to the solution in figure 234, but have instead a
higher availability. This because no acknowledgment is required.
SCSWI
SELECTED
RES_EXT
IED
IED
OR
Other SCWI in
the bay
Station bus
. . .
SPGGIO
IN
RESGRANT
IntlReceive
.
.
.
.
.
.
RESGRANT
IntlReceive
en05000178.vsd
IEC05000178 V2 EN
Figure 236: Application principle for an alternative reservation solution
3.12.2.2 Interaction between modules
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 and
performs the actual switching and is more or less the interface to the drive of one
apparatus. It includes the position handling 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
grounding 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 Four step residual overcurrent protection (EF4PTOC, 51N/67N) trips the
breaker in case of Distance protection zones (ZMQPDIS, 21).
• The Protection trip logic (SMPPTRC, 94) connects the "trip" outputs of one or
more protection functions to a common "trip" to be transmitted to SXCBR.
• The Autorecloser (SMBRREC, 79) consists of the facilities to automatically close
a tripped breaker with respect to a number of configurable conditions.
1MRK504116-UUS C Section 3
IED application
609
Application manual