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 423: 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.
1MRK 502 066-UUS B Section 14
Control
799
Technical manual
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