ABB Relion 670 Series Applications Manual page 333

1MRK 505 370-UUS Rev. K
Signal
BC_12_CL
VP_BC_12
EXDU_BC
These signals from each bus-coupler bay (ABC_BC), except the own bay, are needed:
Signal
BC12CLTR
VPBC12TR
EXDU_BC
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
VPDCTR
EXDU_DC
If the busbar is divided by bus-section circuit breakers, the signals from the bus-section coupler bay
(A1A2_BS), rather than the bus-section disconnector bay (A1A2_DC), must be used. For B1B2_BS,
corresponding signals from busbar B are used. The same type of module (A1A2_BS) is used for different
busbars, that is, for both bus-section circuit breakers A1A2_BS and B1B2_BS.
Signal
S1S2CLTR
VPS1S2TR
EXDU_BS
For a bus-coupler bay in section 1, these conditions are valid:
DCCLTR (A1A2)
DCCLTR (B1B2)
BC12CLTR (sect.2)
VPDCTR (A1A2)
VPDCTR (B1B2)
VPBC12TR (sect.2)
EXDU_DC (A1A2)
EXDU_DC (B1B2)
EXDU_BC (sect.2)
ANSI04000485 V1 EN-US
Figure 159: Signals to a bus-coupler bay in section 1 from a bus-coupler bay in another section
Busbar protection REB670
Application manual
Another bus-coupler connection exists between busbar WA1 and WA2.
The switch status of BC_12 is valid.
No transmission error from any bus-coupler bay (BC).
A bus-coupler connection through the own bus-coupler exists between busbar WA1
and WA2.
The switch status of BC_12 is valid.
No transmission error from the bay that contains the above information.
The bus-section disconnector is closed.
The switch status of bus-section disconnector DC is valid.
No transmission error from the bay that contains the above information.
A bus-section coupler connection exists between bus sections 1 and 2.
The switch status of bus-section coupler BS is valid.
No transmission error from the bay containing the above information.
AND
AND
AND
© 2017 - 2021 Hitachi Power Grids. All rights reserved
BC_12_CL
VP_BC_12
EXDU_BC
en04000485_ansi.vsd
Section 12
Control
327