ABB REL670 2.2 IEC - Interlocking for Bus-Section Breaker A1 A2_BS

If there is no second busbar B at the other side of the transformer and therefore no
QB4 disconnector, then the state for QB4 is set to open by setting the appropriate
module inputs as follows:
• QB4_OP = 1
• QB4_CL = 0
15.4.5 Interlocking for bus-section breaker A1A2_BS
IP14154-1 v2
15.4.5.1 Application
M15110-3 v7
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
334. 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-US
Figure 334: Switchyard layout A1A2_BS
M15111-4 v3
The signals from other bays connected to the module A1A2_BS are described
below.
15.4.5.2 Signals from all feeders
M15111-6 v4
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-UEN B Section 15
Control
Line distance protection REL670 2.2 IEC 671
Application manual