ABB Relion 670 Series Applications Manual page 311

1MRK 511 358-UUS A
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
DCCLTR
VPDCTR
EXDU_DC
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
S1S2CLTR
VPS1S2TR
EXDU_BS
For a line bay in section 1, these conditions are valid:
Application manual
The bus-section disconnector is open.
The bus-section disconnector is closed.
The switch status of bus-section disconnector DC is valid.
No transmission error from the bay that contains the above information.
No bus-section coupler connection between bus-sections 1 and 2.
A bus-section coupler connection exists between bus-sections 1 and 2.
The switch status of bus-section coupler BS is valid.
No transmission error from the bay that contains the above information.
Section 13
Control
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