ABB REO 517 Applications Manual page 268


258
Interlocking
A1 (BB1A)
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The signals from other bays connected to the module A1A2_BS are described below.
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If the busbar is divided by bus-section circuit breakers into bus sections and both circuit
breaker are closed, the opening of the circuit breaker must be blocked if a bus-coupler
connection exists between busbar A and B on one bus-section side and if on the other
bus-section side a busbar transfer is in progress:
Section 1
A1
B1
C
ABC_BC
ABC_LINE
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To derive the signals:
A2 (BB1B)
Q12
Q0
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99000356.vsd
A1A2_BS
B1B2_BS
AB_TRAFO ABC_LINE
Section 2
A2
B2
C
ABC_BC
AB_TRAFO
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