Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
DB_BUS DB_BUSDB_BUS DB_BUS
(WA1)A1
(WA2)B1 B2
A2
en04000498.vsd
IEC04000498 V1 EN-US
Figure 344: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
S1DC_OP All disconnectors on bus-section 1 are open.
S2DC_OP All disconnectors on bus-section 2 are open.
VPS1_DC The switch status of all disconnectors on bus-section 1 is valid.
VPS2_DC The switch status of all disconnectors on bus-section 2 is valid.
EXDU_BB No transmission error from double-breaker bay (DB) that contains the above
information.
These signals from each double-breaker bay (DB_BUS) are needed:
Signal
QB1OPTR QB1 is open.
QB2OPTR QB2 is open.
VPQB1TR The switch status of QB1 is valid.
VPQB2TR The switch status of QB2 is valid.
EXDU_DB No transmission error from the bay that contains the above information.
The logic is identical to the double busbar configuration “Signals in single breaker
arrangement”.
For a bus-section disconnector, these conditions from the A1 busbar section are
valid:
1MRK 506 369-UEN B Section 15
Control
Line distance protection REL670 2.2 IEC 679
Application manual
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