ABB Relion 670 Series Applications Manual page 338

Section 12
Control
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:
332
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.
© 2017 - 2021 Hitachi Power Grids. All rights reserved
1MRK 505 370-UUS Rev. K
Busbar protection REB670
Application manual