12.4.8 Interlocking for double CB bay DB (3)
IP14167-1 v2
12.4.8.1
Application
M13585-3 v10
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 178.
WA1 (A)
WA2 (B)
189
189G
289G
989G
6189
989
289
489G
589G
389G
6289
DB_BUS_B
DB_LINE
DB_BUS_A
en04000518_ansi.vsd
252
152
ANSI04000518 V1 EN-US
Figure 178: Switchyard layout double circuit breaker
Three types of interlocking modules per double circuit breaker bay are defined.
DB_BUS_A (3) handles the circuit breaker QA1 that is connected to busbar WA1 and
the disconnectors and grounding switches of this section. DB_BUS_B (3) handles the
circuit breaker QA2 that is connected to busbar WA2 and the disconnectors and
grounding switches of this section.
M13584-4 v4
For a double circuit-breaker bay, the modules DB_BUS_A, DB_LINE and
DB_BUS_B must be used.
12.4.8.2 Configuration setting
M13584-6 v5
For application without 989 and 989G, just set the appropriate inputs to open state and
disregard the outputs. In the functional block diagram, 0 and 1 are designated
0=FALSE and 1=TRUE:
1MRK 505 370-UUS A Section 12
Control
Busbar protection REB670 2.2 ANSI 395
Application manual
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