ABB Relion 670 Series Applications Manual page 348

Section 14
Control
Signal
BBTR_OP
VP_BBTR
EXDU_12
These signals from each line bay (ABC_LINE), each transformer bay (AB_TRAFO), and bus-coupler
bay (ABC_BC) are needed:
Signal
1289OPTR
VP1289TR
EXDU_12
These signals from each bus-coupler bay (ABC_BC) are needed:
Signal
BC12OPTR
VPBC12TR
EXDU_BC
These signals from the bus-section circuit breaker bay (A1A2_BS, B1B2_BS) are needed.
Signal
S1S2OPTR
VPS1S2TR
EXDU_BS
For a bus-section circuit breaker between A1 and A2 section busbars, these conditions are valid:
342
No busbar transfer is in progress concerning this bus-section.
The switch status of BBTR is valid.
No transmission error from any bay connected to busbar 1(A) and 2(B).
189 or 289 or both are open.
The switch status of 189 and 289 are valid.
No transmission error from the bay that contains the above information.
No bus-coupler connection through the own bus-coupler between busbar WA1
and WA2.
The switch status of BC_12 is valid.
No transmission error from the bay that contains the above information.
No bus-section coupler connection between bus-sections 1 and 2.
The switch status of bus-section coupler BS is valid.
No transmission error from the bay that contains the above information.
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1MRK 511 401-UUS F
Bay control REC670
Application manual