ABB Relion 670 Series Applications Manual page 336

Section 12
Control
Signal
BC_12_CL
VP_BC_12
EXDU_BC
The logic is identical to the double busbar configuration "Signals from bus-coupler".
12.4.4.3 Configuration setting
If there are no second busbar B and therefore no 289 disconnector, then the interlocking for 289 is not
used. The state for 289, 2189G, BC_12 are set to open by setting the appropriate module inputs as
follows. In the functional block diagram, 0 and 1 are designated 0=FALSE and 1=TRUE:
• 289_OP = 1
• 289QB2_CL = 0
• 2189G_OP = 1
• 2189G_CL = 0
• BC_12_CL = 0
• VP_BC_12 = 1
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
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 162. The function can be used for different busbars, which
includes a bus-section circuit breaker.
330
A bus-coupler connection exists between busbar WA1 and WA2.
The switch status of BC_12 is valid.
No transmission error from bus-coupler bay (BC).
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