ABB Relion 670 Series Applications Manual page 341

1MRK 505 370-UUS Rev. K
12.4.6.1 Application
The interlocking for bus-section disconnector (A1A2_DC, 3) function is used for one bus-section
disconnector between section 1 and 2 according to figure 166. A1A2_DC (3) function can be used for
different busbars, which includes a bus-section disconnector.
WA1 (A1)
ANSI04000492 V1 EN-US
Figure 166: Switchyard layout A1A2_DC (3)
The signals from other bays connected to the module A1A2_DC are described below.
12.4.6.2 Signals in single breaker arrangement
If the busbar is divided by bus-section disconnectors, the condition no other disconnector connected to
the bus-section must be made by a project-specific logic.
The same type of module (A1A2_DC) is used for different busbars, that is, for both bus-section
disconnector A1A2_DC and B1B2_DC. But for B1B2_DC, corresponding signals from busbar B are
used.
(WA1)A1
(WA2)B1
(WA7)C
ABC_LINE
ANSI04000493 V1 EN-US
Figure 167: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
S1DC_OP
S2DC_OP
VPS1_DC
VPS2_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:
Busbar protection REB670
Application manual
52
189G
A1A2_DC
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
AB_TRAFO
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 any bay that contains the above information.
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WA2 (A2)
en04000492_ansi.vsd
Section 2 A2
B2
ABC_BC
ABC_LINE AB_TRAFO
en04000493_ansi.vsd
289G
A3
B3
C
Section 12
Control
M13544-3 v7
M13542-4 v4
M13542-6 v5
335