Hitachi Relion 670 Series Applications Manual page 263

1MRK506375-UEN Rev. N
Signal
S1DC_OP
S2DC_OP
VPS1_DC
VPS2_DC
EXDU_BB
12.4.7 Interlocking for busbar earthing switch BB_ES
12.4.7.1 Application
The interlocking for busbar earthing switch (BB_ES) function is used for one busbar earthing switch
on any busbar parts according to figure 120.
IEC04000504 V1 EN-US
Figure 120:
The signals from other bays connected to the module BB_ES are described below.
12.4.7.2 Signals in single breaker arrangement
The busbar earthing switch is only allowed to operate if all disconnectors of the bus-section are open.
(WA1)A1
(WA2)B1
(WA7)C
IEC04000505 V1 EN-US
Figure 121:
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:
Railway application RER670
Application manual
All disconnectors on bus-section 1 are open.
All disconnectors on bus-section 2 are open.
The switch status of disconnectors on bus-section 1 is valid.
The switch status of disconnectors on bus-section 2 is valid.
No transmission error from breaker and a half (BH) that contains the above
information.
QC
en04000504.vsd
Switchyard layout BB_ES
Section 1
BB_ES ABC_BC
ABC_LINE
Busbars divided by bus-section disconnectors (circuit breakers)
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.
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Section 2
A1A2_DC(BS)
B1B2_DC(BS)
AB_TRAFO ABC_LINE
Section 12
Control
IP14164-1 v4
M15015-3 v7
M15053-4 v4
M15053-6 v5
A2
B2
C
BB_ES
en04000505.vsd
257