ABB RET670 - Interlocking for Double CB Bay DB (3)

The logic is identical to the double busbar configuration described in section “Signals
in single breaker arrangement”.
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 273: 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.
3.12.3.8 Interlocking for double CB bay DB (3)
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
274.
Section 3 1MRK504116-UUS C
IED application
648
Application manual