The project-specific logic for input signals concerning bus-coupler are the same as the
specific logic for the line bay (ABC_LINE):
Signal
BC_12_CL A bus-coupler connection exists between busbar WA1 and WA2.
VP_BC_12 The switch status of BC_12 is valid.
EXDU_BC No transmission error from bus-coupler bay (BC).
The logic is identical to the double busbar configuration “Signals from bus-coupler“.
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
3.12.3.5 Interlocking for bus-section breaker A1A2_BS (3)
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 3 1MRK504116-UUS C
IED application
630
Application manual
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