Functionality - ABB Relion 650 Series REB650 Technical Manual

Section 10
Control
10.3.8.2
226

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 99.
QB1
QA1
DB_BUS_A
QB61
QB9
IEC04000518 V1 EN
Figure 99: 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.
QB2
QC1
QA2
QC2
QB62
QC9
1MRK 505 288-UEN A
WA1 (A)
WA2 (B)
QC4
DB_BUS_B
QC5
QC3
DB_LINE
en04000518.vsd
Technical manual