ABB RELION 670 Series Applications Manual page 311

1MRK 505 337-UUS A
12.4.5 Interlocking for bus-section breaker A1A2_BS (3)
12.4.5.1 Application
The interlocking for bus-section breaker (A1A2_BS ,3) function is used for one bus-section circuit
breaker between section 1 and 2 according to figure 140. The function can be used for different
busbars, which includes a bus-section circuit breaker.
ANSI04000516 V1 EN-US
Figure 140: Switchyard layout A1A2_BS (3)
The signals from other bays connected to the module A1A2_BS are described below.
12.4.5.2 Signals from all feeders
If the busbar is divided by bus-section circuit breakers into bus-sections and both circuit breakers
are closed, the opening of the circuit breaker must be blocked if a bus-coupler connection exists
between busbars on one bus-section side and if on the other bus-section side a busbar transfer is
in progress:
(WA1)A1
(WA2)B1
(WA7)C
ABC_LINE
ANSI04000489 V1 EN-US
Figure 141: Busbars divided by bus-section circuit breakers
To derive the signals:
Application manual
WA1 (A1)
189
189G
152
389G
A1A2_BS
Section 1
A1A2_BS
B1B2_BS
ABC_BC
AB_TRAFO
WA2 (A2)
289 289G
489G
en04000516_ansi.vsd
Section 2
ABC_BC
ABC_LINE AB_TRAFO
en04000489_ansi.vsd
A2
B2
C
Section 12
Control
IP14154-1 v2
M15110-3 v7
M15111-4 v3
M15111-6 v4
305