Hitachi Relion 670 Series Applications Manual page 267

1MRK506375-UEN Rev. N
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 126:
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 127:
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) is used for
different busbars, that is, for both bus-section disconnectors A1A2_DC and B1B2_DC.
Railway application RER670
Application manual
Signals from bypass busbar to busbar earthing switch
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES
DB_BUS
Busbars divided by bus-section disconnectors (circuit breakers)
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.
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BB_DC_OP
&
VP_BB_DC
&
EXDU_BB
&
en04000510.vsd
Section 2
A2
B2
BB_ES
DB_BUS
en04000511.vsd
Section 12
Control
M15053-83 v4
261