ABB Relion 670 series - Signals from Bus-Coupler

For a bus-coupler bay in section 2, the same conditions as above are valid by changing
section 1 to section 2 and vice versa.
15.4.3.4 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.
en04000484_ansi.vsd
Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
ABC_BCABC_BC
(WA1)A1
(WA2)B1
(WA7)C C
B2
A2
ANSI04000484 V1 EN
Figure 332: 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.
Section 15 1MRK 506 369-UUS -
Control
710 Line distance protection REL670 2.2 ANSI
Application manual