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Interlocking
The same type of module (A1A2_DC) is used for different busbars, that is, for both bus-
section disconnector A1A2_DC and B1B2_DC. But for B1B2_DC, corresponding sig-
nals from busbar B are used.
Section 1
A1
B1
BH_LINE
BH_LINE
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The project-specific logic are the same as for the logic for the double-breaker configu-
ration.
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A1DC_OP
Signal if all disconnectors on busbar A1 are open.
A2DC_OP
Signal if all disconnectors on busbar A2 are open.
VPA1_DC
The switch status of A1_DC is valid.
VPA2_DC
The switch status of A2_DC is valid.
EXDUP_BB
Signal if there is no transmission error from bay BH (breaker and a half)
that contains the above information.
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The interlocking module BB_ES is used for one busbar earthing switch on any busbar
parts according to figure 149.
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Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BH_LINE BH_LINE
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A2
B2
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271
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