Hitachi Relion 670 Series Applications Manual page 247

1MRK506375-UEN Rev. N
• BB7_D_OP = 1
• BC_17_OP = 1
• BC_17_CL = 0
• BC_27_OP = 1
• BC_27_CL = 0
• EXDU_BPB = 1
• VP_BB7_D = 1
• VP_BC_17 = 1
• VP_BC_27 = 1
If there is no second busbar WA2 and therefore no QB2 disconnector, then the interlocking for QB2
is not used. The state for QB2, QC21, BC_12, BC_27 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
• QB2_CL = 0
• QC21_OP = 1
• QC21_CL = 0
• BC_12_CL = 0
• BC_27_OP = 1
• BC_27_CL = 0
• VP_BC_12 = 1
12.4.3 Interlocking for bus-coupler bay ABC_BC
12.4.3.1 Application
The interlocking for bus-coupler bay (ABC_BC) function is used for a bus-coupler bay connected to a
double busbar arrangement according to figure 96. The function can also be used for a single busbar
arrangement with transfer busbar or double busbar arrangement without transfer busbar.
QB1
QA1
IEC04000514 V1 EN-US
Figure 96:
Railway application RER670
Application manual
QB2 QB20 QB7
QC1
QC2
en04000514.vsd
Switchyard layout ABC_BC
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WA1 (A)
WA2 (B)
WA7 (C)
Section 12
Control
IP14144-1 v2
M13555-3 v8
241