ABB REG670 Applications Manual

• QB4_OP = 1
• QB4_CL = 0
15.3.5 Interlocking for bus-section breaker A1A2_BS
15.3.5.1 Application
The interlocking for bus-section breaker (A1A2_BS) function is used for one bus-
section circuit breaker between section 1 and 2 according to figure 254. The function
can be used for different busbars, which includes a bus-section circuit breaker.
QA1
WA1 (A1)
QB2
QC4
QB1
QC3
WA2 (A2)
en04000516.vsd
QC2QC1
A1A2_BS
IEC04000516 V1 EN
Figure 254: Switchyard layout A1A2_BS
The signals from other bays connected to the module A1A2_BS are described below.
15.3.5.2 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:
Section 1 Section 2
A1A2_BS
B1B2_BS
ABC_LINE
ABC_BC
ABC_LINE
ABC_BC
(WA1)A1
(WA2)B1
(WA7)C C
B2
A2
en04000489.vsd
AB_TRAFOAB_TRAFO
IEC04000489 V1 EN
Figure 255: Busbars divided by bus-section circuit breakers
Section 15 1MRK 502 071-UEN -
Control
528 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual

ABB REG670 Specifications

General

Brand	ABB
Model	REG670
Category	Protection Device
Language	English