ABB RET670 Applications Manual page 632

Section 3
IED application
626
Signals from bus-coupler
If the busbar is divided by bus-section disconnectors into bus-sections, the signals
BC_12 from the busbar coupler of the other busbar section must be transmitted to the
own busbar coupler if both disconnectors are closed.
Section 1
(WA1)A1
(WA2)B1
(WA7)C
ABC_BC
ANSI04000484 V1 EN
Figure 246: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
BC_12_CL Another bus-coupler connection exists between busbar WA1 and WA2.
VP_BC_12 The switch status of BC_12 is valid.
EXDU_BC No transmission error from any bus-coupler bay (BC).
These signals from each bus-coupler bay (ABC_BC), except the own bay, are needed:
Signal
BC12CLTR A bus-coupler connection through the own bus-coupler exists 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 each bus-section disconnector bay (A1A2_DC) are also needed.
For B1B2_DC, corresponding signals from busbar B are used. The same type of
module (A1A2_DC) is used for different busbars, that is, for both bus-section
disconnector A1A2_DC and B1B2_DC.
Signal
DCCLTR The bus-section disconnector is closed.
VPDCTR The switch status of bus-section disconnector DC is valid.
EXDU_DC No transmission error from the bay that contains the above information.
Section 2
A1A2_DC(BS)
B1B2_DC(BS)
ABC_BC
en04000484_ansi.vsd
1MRK504116-UUS C
A2
B2
C
Application manual