ABB Relion 670 Series Applications Manual page 358

Section 14
Control
Signal
BB_DC_OP
VP_BB_DC
EXDU_BB
These signals from each line bay (ABC_LINE), each transformer bay (AB_TRAFO), and each bus-
coupler bay (ABC_BC) are needed:
Signal
189OPTR
289OPTR
22089OTR
789OPTR
VP189TR
VP289TR
V22089TR
VP789TR
EXDU_BB
These signals from each bus-section disconnector bay (A1A2_DC) are also needed. For B1B2_DC,
corresponding signals from busbar B are used. The same type of module (A1A2_DC) is used for
different busbars, that is, for both bus-section disconnectors A1A2_DC and B1B2_DC.
Signal
DCOPTR
VPDCTR
EXDU_DC
If no bus-section disconnector exists, the signal DCOPTR, VPDCTR and EXDU_DC are set to 1
(TRUE).
If the busbar is divided by bus-section circuit breakers, the signals from the bus-section coupler
bay (A1A2_BS) rather than the bus-section disconnector bay (A1A2_DC) must be used. For
B1B2_BS, corresponding signals from busbar B are used. The same type of module (A1A2_BS) is
used for different busbars, that is, for both bus-section circuit breakers A1A2_BS and B1B2_BS.
Signal
189OPTR
289OPTR
VP189TR
VP289TR
EXDU_BS
352
All disconnectors on this part of the busbar are open.
The switch status of all disconnector on this part of the busbar is valid.
No transmission error from any bay containing the above information.
189 is open.
289 is open (AB_TRAFO, ABC_LINE)
289 and 2089 are open (ABC_BC)
789 is open.
The switch status of 189 is valid.
The switch status of 289 is valid.
The switch status of 289and 2089 is valid.
The switch status of 789 is valid.
No transmission error from the bay that contains the above information.
The bus-section disconnector is open.
The switch status of bus-section disconnector DC is valid.
No transmission error from the bay that contains the above information.
189 is open.
289 is open.
The switch status of 189 is valid.
The switch status of 289 is valid.
No transmission error from the bay BS (bus-section coupler bay) that contains
the above information.
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1MRK 511 401-UUS F
Bay control REC670
Application manual