ABB Relion 670 Series Applications Manual page 352

Section 12
Control
(WA1)A1
(WA2)B1
ANSI04000511 V1 EN-US
Figure 185: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
BB_DC_OP
VP_BB_DC
EXDU_BB
These signals from each double-breaker bay (DB_BUS) are needed:
Signal
189OPTR
289OPTR
VP189TR
VP289TR
EXDU_DB
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
The logic is identical to the double busbar configuration described in section "Signals in single breaker
arrangement".
12.4.7.4 Signals in breaker and a half arrangement
The busbar grounding switch is only allowed to operate if all disconnectors of the bus-section are open.
346
Section 1
Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES
DB_BUS DB_BUS
All disconnectors of this part of the busbar are open.
The switch status of all disconnectors on this part of the busbar are valid.
No transmission error from any 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 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.
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A2
B2
BB_ES
en04000511_ansi.vsd
1MRK 505 370-UUS Rev. K
M15053-123 v4
Busbar protection REB670
Application manual