ABB Relion 670 Series Applications Manual page 301

1MRK 511 358-UUS A
To ensure that the interlocking information is correct at the time of operation, a unique
reservation method is available in the IEDs. With this reservation method, the bay that wants the
reservation sends a reservation request to other bays and then waits for a reservation granted
signal from the other bays. Actual position indications from these bays are then transferred over
the station bus for evaluation in the IED. After the evaluation the operation can be executed with
high security.
This functionality is realized over the station bus by means of the function blocks QCRSV and
RESIN. The application principle is shown in Figure 120.
The function block QCRSV handles the reservation. It sends out either the reservation request to
other bays or the acknowledgement if the bay has received a request from another bay.
The other function block RESIN receives the reservation information from other bays. The number
of instances is the same as the number of involved bays (up to 60 instances are available). The
received signals are either the request for reservation from another bay or the acknowledgment
from each bay respectively, which have received a request from this bay. Also the information of
valid transmission over the station bus must be received.
IED
. . .
ANSI05000117 V2 EN-US
Figure 120: Application principles for reservation over the station bus
The reservation can also be realized with external wiring according to the application example in
Figure 121. This solution is realized with external auxiliary relays and extra binary inputs and
outputs in each IED, but without use of function blocks QCRSV and RESIN.
Application manual
IED
RES_GRT
3
RESIN
EXCH _IN
EXCH _ OUT
. . .
RESIN
EXCH _IN
EXCH _OUT
3
Station bus
SCSWI
RES_RQ
QCRSV
RES_RQ1
. .
From other
RES_RQ8
SCSWI in
the bay
RES_GRT1
. .
RES_GRT8
RES_ DATA
2
Section 13
Control
To other
SCSWI
in the
bay
en 05000117 _ansi . vsd
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