connection exists between busbars on one bus-section side and if on the other bus-section
side a busbar transfer is in progress:
Section 1
Section 2
A1A2_BS
B1B2_BS
ABC_LINE
ABC_BC
ABC_LINE
ABC_BC
(WA1)A1
(WA2)B1
(WA7)C
C
B2
A2
en04000489.vsd
AB_TRAFO
AB_TRAFO
IEC04000489 V1 EN-US
Figure 344: Busbars divided by bus-section circuit breakers
To derive the signals:
Signal
BBTR_OP
No busbar transfer is in progress concerning this bus-section.
VP_BBTR
The switch status of BBTR is valid.
EXDU_12
No transmission error from any bay connected to busbar 1(A) and 2(B).
These signals from each line bay (ABC_LINE), each transformer bay (AB_TRAFO), and bus-
coupler bay (ABC_BC) are needed:
Signal
QB12OPTR
QB1 or QB2 or both are open.
VPQB12TR
The switch status of QB1 and QB2 are valid.
EXDU_12
No transmission error from the bay that contains the above information.
These signals from each bus-coupler bay (ABC_BC) are needed:
Signal
BC12OPTR
No bus-coupler connection through the own bus-coupler between busbar WA1
and WA2.
VPBC12TR
The switch status of BC_12 is valid.
EXDU_BC
No transmission error from the bay that contains the above information.
These signals from the bus-section circuit breaker bay (A1A2_BS, B1B2_BS) are needed.
Signal
S1S2OPTR
No bus-section coupler connection between bus-sections 1 and 2.
VPS1S2TR
The switch status of bus-section coupler BS is valid.
EXDU_BS
No transmission error from the bay that contains the above information.
For a bus-section circuit breaker between A1 and A2 section busbars, these conditions are
valid:
Section 14
1MRK 505 343-UEN B
Control
574
Application manual
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