ABB Relion 670 Series Applications Manual page 348
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
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- Applications manual (944 pages)
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Section 12
Control
12.4.7.2
Signals in single breaker arrangement
The busbar grounding switch is only allowed to operate if all disconnectors of the bus-section are open.
(WA1)A1
(WA2)B1
(WA7)C
ANSI04000505 V1 EN-US
Figure 179: 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 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,
342
Section 1
BB_ES
ABC_BC
ABC_LINE
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.
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Section 2
A1A2_DC(BS)
B1B2_DC(BS)
AB_TRAFO
ABC_LINE
1MRK 505 370-UUS Rev. K
A2
B2
C
BB_ES
en04000505_ansi.vsd
Busbar protection REB670
M15053-6 v5
Application manual
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