For bus-coupler bay n, these conditions are valid:
QB12OPTR (bay 1)
QB12OPTR (bay 2)
. . .
. . .
QB12OPTR (bay n-1)
&
BBTR_OP
VPQB12TR (bay 1)
VPQB12TR (bay 2)
. . .
. . .
VPQB12TR (bay n-1)
&
VP_BBTR
EXDU_12 (bay 1)
EXDU_12 (bay 2)
. . .
. . .
EXDU_12 (bay n-1)
&
EXDU_12
en04000481.vsd
IEC04000481 V1 EN-US
Figure 327: Signals from any bays in bus-coupler bay n
If the busbar is divided by bus-section disconnectors into bus-sections, the signals
BBTR are connected in parallel - if both bus-section disconnectors are closed. So
for the basic project-specific logic for BBTR above, add this logic:
Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
ABC_LINE
ABC_BC
ABC_LINE ABC_BC
(WA1)A1
(WA2)B1
(WA7)C C
B2
A2
en04000482.vsd
AB_TRAFO
IEC04000482 V1 EN-US
Figure 328: 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 The bus-section disconnector is open.
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), have to be used. For B1B2_BS, corresponding signals from busbar B
1MRK 506 369-UEN B Section 15
Control
Line distance protection REL670 2.2 IEC 665
Application manual
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