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