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789OPTR (bay 1)
BB_DC_OP
VP_BB_DC
EXDU_BB
en04000510_ansi.vsd
AND
AND
AND
789OPTR (bay n)
. . .
. . .
. . .
VP789TR (bay 1)
VP789TR (bay n)
EXDU_BB (bay 1)
EXDU_BB (bay n)
. . .
. . .
. . .
. . .
. . .
. . .
ANSI04000510 V1 EN-US
Figure 61: Signals from bypass busbar to busbar grounding switch
10.3.4.3
Signals in double-breaker arrangement
M15053-83 v3
The busbar grounding switch is only allowed to operate if all disconnectors of the bus section are
open.
en04000511_ansi.vsd
Section 1
Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES
BB_ES
DB_BUS
(WA1)A1
(WA2)B1
B2
A2
DB_BUS
ANSI04000511 V1 EN-US
Figure 62: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
BB_DC_OP
All disconnectors of this part of the busbar are open.
VP_BB_DC
The switch status of all disconnectors on this part of the busbar are valid.
EXDU_BB
No transmission error from any bay that contains the above information.
These signals from each double-breaker bay (DB_BUS) are needed:
Signal
189OPTR
189 is open.
289OPTR
289 is open.
VP189TR
The switch status of 189 is valid.
VP289TR
The switch status of 289 is valid.
EXDU_DB
No transmission error from the bay that contains the above information.
1MRK 505 287-UUS B
Section 10
Control
Busbar protection REB650
145
Application manual
© Copyright 2013 ABB. All rights reserved
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