15.4.6.3 Signals in double-breaker arrangement
If the busbar is divided by bus-section disconnectors, the condition for the busbar
disconnector bay no other disconnector connected to the bus-section must be made by a
project-specific logic.
The same type of module (A1A2_DC) is used for different busbars, that is, for both bus-
section disconnector A1A2_DC and B1B2_DC. But for B1B2_DC, corresponding
signals from busbar B are used.
en04000498_ansi.vsd
Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
DB_BUS DB_BUSDB_BUS DB_BUS
(WA1)A1
(WA2)B1
B2
A2
ANSI04000498 V1 EN
Figure 346: 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
189OPTR 189 is open.
289OPTR 289 is open.
VP189TR The switch status of 189 is valid.
VP289TR The switch status of 289 is valid.
EXDU_DB No transmission error from the bay that contains the above information.
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 723
Application manual
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