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272
Interlocking
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The signals from other bays connected to the module BB_ES are described below.
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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
C
BB_ES
ABC_LINE
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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 no transmission error from any bay containing the above informa-
tion.
These signals from each line bay (ABC_LINE), each transformer bay (AB_TRAFO),
and each bus-coupler bay (ABC_BC) are needed:
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Q1OPTR
Signal if Q1 is open.
Q2OPTR
Signal if Q2 (AB_TRAFO, ABC_LINE) is open.
Q20OPTR
Signal if Q2 and Q20 (ABC_BC) are open.
Q7OPTR
Signal if Q7 is open.
VPQ1TR
The switch status of Q1 is valid.
A1A2_DC(BS)
B1B2_DC(BS)
ABC_BC
AB_TRAFO ABC_LINE
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Section 2
A2
B2
C
BB_ES
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