ABB Relion 670 Series Applications Manual page 362
Bay control
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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Section 15
Control
of the switching devices are uncertain. The interlocking function uses this information for
evaluation, which means that also the interlocking conditions are uncertain.
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 160.
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
. . .
IEC05000117 V2 EN-US
Figure 160: Application principles for reservation over the station bus
The reservation can also be realized with external wiring according to the application example
in Figure 161. 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.
356
IED
3
RESIN
EXCH_IN
EXCH_OUT
. . .
RESIN
EXCH_IN
EXCH_OUT
3
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SCSWI
RES_GRT
RES_RQ
QCRSV
RES_RQ1
. .
From other
SCSWI in
RES_RQ8
the bay
RES_GRT1
. .
RES_GRT8
RES_DATA
Station bus
1MRK 511 401-UEN Rev. K
To other
SCSWI
in the
bay
2
en05000117.vsd
Bay control REC670
Application manual
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