ABB Relion 650 Series Applications Manual page 166

Section 10
Control
(WA1)A1
(WA2)B1
(WA7)C
ABC_LINE
ANSI04000482 V1 EN-US
Figure 82: Busbars divided by bus-section disconnectors (circuit breakers)
The following signals from each bus-section disconnector bay (A1A2_DC) are 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
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), have to 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
VPS1S2TR
EXDU_BS
For a bus-coupler bay in section 1, these conditions are valid:
160
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
ABC_BC
The interlocking functionality in 650 series cannot handle the transfer bus (WA7)C.
The bus-section disconnector is open.
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.
The switch status of bus-section coupler BS is valid.
No transmission error from the bay that contains the above information.
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Section 2
ABC_BC
ABC_LINE AB_TRAFO
en04000482_ansi.vsd
1MRK 505 287-UUS B
A2
B2
C
Busbar protection REB650
Application manual