Hitachi Relion 670 Series Applications Manual page 268

Section 12
Control
Signal
DCOPTR
VPDCTR
EXDU_DC
The logic is identical to the double busbar configuration described in section "Signals in single
breaker arrangement".
12.4.7.4 Signals in 1 1/2 breaker arrangement
The busbar earthing switch is only allowed to operate if all disconnectors of the bus-section are open.
(WA1)A1
(WA2)B1
IEC04000512 V1 EN-US
Figure 128:
The project-specific logic are the same as for the logic for the double busbar configuration described
in section "Signals in single breaker arrangement".
Signal
BB_DC_OP
VP_BB_DC
EXDU_BB
12.4.8 Interlocking for double CB bay DB
12.4.8.1 Application
The interlocking for a double busbar double circuit breaker bay including DB_BUS_A, DB_BUS_B
and DB_LINE functions are used for a line connected to a double busbar arrangement according to
figure 129.
262
The bus-section disconnector is open.
The switch status of bus-section disconnector DC is valid.
No transmission error from the bay that contains the above information.
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES
BH_LINE
Busbars divided by bus-section disconnectors (circuit breakers)
All disconnectors on this part of the busbar are open.
The switch status of all disconnectors on this part of the busbar is valid.
No transmission error from any bay that contains the above information.
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Section 2
A2
B2
BB_ES
BH_LINE
en04000512.vsd
1MRK506375-UEN Rev. N
M15053-123 v4
IP14167-1 v2
M13585-3 v10
Railway application RER670
Application manual