If there is no second busbar B at the other side of the transformer and therefore no 489
disconnector, then the state for 489 is set to open by setting the appropriate module inputs
as follows:
• 489_OP = 1
• 489_CL = 0
15.4.5 Interlocking for bus-section breaker A1A2_BS (3)
15.4.5.1 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
336. The function can
be used for different busbars, which includes a bus-section circuit breaker.
WA1 (A1)
289
489G
189
389G
WA2 (A2)
en04000516_ansi.vsd
289G
189G
A1A2_BS
152
ANSI04000516 V1 EN
Figure 336: Switchyard layout A1A2_BS (3)
The signals from other bays connected to the module A1A2_BS are described below.
15.4.5.2 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:
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 715
Application manual
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