ABB RELION 650 SERIES, Applications Manual

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These signals from each bus-section disconnector bay (A1A2_DC) are also needed. For B1B2_DC,
corresponding signals from busbar B are used. The same type of module (A1A2_DC) is used for
different busbars, that is, for both bus-section disconnector A1A2_DC and B1B2_DC.
Signal
DCOPTR The bus-section disconnector is open.
DCCLTR The bus-section disconnector is closed.
VPDCTR The switch status of bus-section disconnector DC is valid.
EXDU_DC No transmission error from the bay that contains the above information.
If the busbar is divided by bus-section circuit breakers, the signals from the bus-section coupler
bay (A1A2_BS), rather than the bus-section disconnector bay (A1A2_DC) must be used. For
B1B2_BS, corresponding signals from busbar B are used. The same type of module (A1A2_BS) is
used for different busbars, that is, for both bus-section circuit breakers A1A2_BS and B1B2_BS.
Signal
S1S2OPTR No bus-section coupler connection between bus-sections 1 and 2.
S1S2CLTR A bus-section coupler connection exists between bus-sections 1 and 2.
VPS1S2TR The switch status of bus-section coupler BS is valid.
EXDU_BS No transmission error from the bay that contains the above information.
For a line bay in section 1, these conditions are valid:
1MRK 505 287-UUS B Section 10
Control
Busbar protection REB650 169
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