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Section 12
Control
QB7OPTR (bay 1)
. . .
. . .
. . .
QB7OPTR (bay n)
VPQB7TR (bay 1)
. . .
. . .
. . .
VPQB7TR (bay n)
EXDU_BB (bay 1)
. . .
. . .
. . .
EXDU_BB (bay n)
IEC04000510 V1 EN-US
Figure 181: Signals from bypass busbar to busbar earthing switch
12.4.7.3
Signals in double-breaker arrangement
The busbar earthing switch is only allowed to operate if all disconnectors of the bus section
are open.
(WA1)A1
(WA2)B1
IEC04000511 V1 EN-US
Figure 182: 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
QB1OPTR
QB2OPTR
VPQB1TR
VPQB2TR
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)
326
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES
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.
QB1 is open.
QB2 is open.
The switch status of QB1 is valid.
The switch status of QB2 is valid.
No transmission error from the bay that contains the above information.
BB_DC_OP
&
VP_BB_DC
&
EXDU_BB
&
en04000510.vsd
Section 2
A2
B2
BB_ES
DB_BUS
en04000511.vsd
1MRK 505 370-UEN D
M15053-83 v4
Busbar protection REB670
Application manual
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