Signals From Bus-Coupler - ABB Relion REC670 Applications Manual

Section 13
Control
QB1
QA1
T
QA2
QB3
IEC04000515 V1 EN-US
Figure 121: Switchyard layout AB_TRAFO
The signals from other bays connected to the module AB_TRAFO are described below.
13.4.4.2

Signals from bus-coupler

If the busbar is divided by bus-section disconnectors into bus-sections, the busbar-busbar
connection could exist via the bus-section disconnector and bus-coupler within the other bus-
section.
(WA1)A1
(WA2)B1
(WA7)C
IEC04000487 V1 EN-US
Figure 122: Busbars divided by bus-section disconnectors (circuit breakers)
The project-specific logic for input signals concerning bus-coupler are the same as the specific
logic for the line bay (ABC_LINE):
Signal
BC_12_CL
VP_BC_12
EXDU_BC
The logic is identical to the double busbar configuration "Signals from bus-coupler".
278
WA1 (A)
WA2 (B)
QB2
QC1
AB_TRAFO
QC2
QC3
QA2 and QC4 are not
used in this interlocking
QC4
QB4
en04000515.vsd
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
AB_TRAFO ABC_BC
A bus-coupler connection exists between busbar WA1 and WA2.
The switch status of BC_12 is valid.
No transmission error from bus-coupler bay (BC).
Section 2
AB_TRAFO ABC_BC
en04000487.vsd
1MRK 511 358-UEN A
A2
B2
C
Application manual
M13566-4 v4
M13566-6 v4