ABB ret650 - Functionality

12.2.6.2 Functionality
The interlocking for a double busbar double circuit breaker bay including
DB_BUS_A, DB_BUS_B and DB_LINE functions are used for a line connected to a
double busbar arrangement according to figure
139.
WA1 (A)
WA2 (B)
QB1
QC1
QA1
QC2
QC9
QB61
QB9
QB2
QC4
QA2
QC5
QC3
QB62
DB_BUS_B
DB_LINE
DB_BUS_A
en04000518.vsd
IEC04000518 V1 EN
Figure 139: Switchyard layout double circuit breaker
Three types of interlocking modules per double circuit breaker bay are defined.
DB_BUS_A handles the circuit breaker QA1 that is connected to busbar WA1 and the
disconnectors and earthing switches of this section. DB_BUS_B handles the circuit
breaker QA2 that is connected to busbar WA2 and the disconnectors and earthing
switches of this section.
1MRK 504 135-UEN A Section 12
Control
303
Technical manual