ABB Relion 670 series - Page 709

Signal
BC_12_CL A bus-coupler connection exists between busbar WA1 and WA2.
BC_17_OP No bus-coupler connection between busbar WA1 and WA7.
BC_17_CL A bus-coupler connection exists between busbar WA1and WA7.
BC_27_OP No bus-coupler connection between busbar WA2 and WA7.
BC_27_CL A bus-coupler connection exists between busbar WA2 and WA7.
VP_BC_12 The switch status of BC_12 is valid.
VP_BC_17 The switch status of BC_17 is valid.
VP_BC_27 The switch status of BC_27 is valid.
EXDU_BC No transmission error from any bus-coupler bay (BC).
These signals from each bus-coupler bay (ABC_BC) are needed:
Signal
BC12CLTR A bus-coupler connection through the own bus-coupler exists between busbar WA1
and WA2.
BC17OPTR No bus-coupler connection through the own bus-coupler between busbar WA1 and
WA7.
BC17CLTR A bus-coupler connection through the own bus-coupler exists between busbar WA1
and WA7.
BC27OPTR No bus-coupler connection through the own bus-coupler between busbar WA2 and
WA7.
BC27CLTR A bus-coupler connection through the own bus-coupler exists between busbar WA2
and WA7.
VPBC12TR The switch status of BC_12 is valid.
VPBC17TR The switch status of BC_17 is valid.
VPBC27TR The switch status of BC_27 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
DCOPTR The bus-section disconnector is open.
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.
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 703
Application manual