ABB Relion 670 series - Signals in Breaker and a Half Arrangement

The logic is identical to the double busbar configuration described in section “Signals in
single breaker arrangement”.
15.4.7.4 Signals in breaker and a half arrangement
The busbar grounding switch is only allowed to operate if all disconnectors of the bus-
section are open.
en04000512_ansi.vsd
Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BB_ESBB_ES
BH_LINE
(WA1)A1
(WA2)B1 B2
A2
BH_LINE
ANSI04000512 V1 EN
Figure 360: Busbars divided by bus-section disconnectors (circuit breakers)
The project-specific logic are the same as for the logic for the double busbar configuration
described in section “Signals in single breaker arrangement”.
Signal
BB_DC_OP All disconnectors on this part of the busbar are open.
VP_BB_DC The switch status of all disconnectors on this part of the busbar is valid.
EXDU_BB No transmission error from any bay that contains the above information.
15.4.8 Interlocking for double CB bay DB (3)
15.4.8.1 Application
The interlocking for a double busbar double circuit breaker bay including DB_BUS_A
(3), DB_BUS_B (3) and DB_LINE (3) functions are used for a line connected to a double
busbar arrangement according to figure 361.
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 733
Application manual