Hitachi Relion 670 Series Applications Manual page 253

1MRK506375-UEN Rev. N
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 QB2 disconnector, then the interlocking for QB2 is
not used. The state for QB2, QC21, 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:
• QB2_OP = 1
• QB2QB2_CL = 0
• QC21_OP = 1
• QC21_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 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
12.4.5 Interlocking for bus-section breaker A1A2_BS
12.4.5.1 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 104. The function can be used for different
busbars, which includes a bus-section circuit breaker.
IEC04000516 V1 EN-US
Figure 104:
The signals from other bays connected to the module A1A2_BS are described below.
Railway application RER670
Application manual
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).
WA1 (A1)
QC1 QB1
QC3
A1A2_BS
Switchyard layout A1A2_BS
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WA2 (A2)
QB2
QA1
QC4
en04000516.vsd
QC2
Section 12
Control
M13566-22 v5
IP14154-1 v2
M15110-3 v7
M15111-4 v3
247