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Interlocking
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The busbar earthing switch is only allowed to operate if all disconnectors of the bus sec-
tion are open.
Section 1
A1
B1
A1A2_DC(BS)
B1B2_DC(BS)
BB_ES
DB_BUS
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To derive the signals:
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ABCDC_OP
Signal if all disconnectors of this busbar section are open.
VP_ABCDC
The switch status of ABCDC is valid.
EXDUP_BB
Signal if there is no transmission error from any bay that contains the above
information.
These signals from each double-breaker bay (DB_BUS) are needed:
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Q1OPTR
Signal if Q1 is open.
Q2OPTR
Signal if Q2 is open.
VPQ1TR
The switch status of Q1 is valid.
VPQ2TR
The switch status of Q2 is valid.
EXDUP_DB
Signal if there is no transmission error from the bay that contains the above
information. This signal is taken from the data valid output on the command
function block.
Section 2
A2
B2
BB_ES
DB_BUS
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277
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