ABB RET670 - Page 653

Signals in double-breaker arrangement
The busbar grounding switch is only allowed to operate if all disconnectors of the bus
section are open.
en04000511_ansi.vsd
Section 1
Section 2
A1A2_DC(BS)
B1B2_DC(BS)
BB_ESBB_ES
DB_BUS
(WA1)A1
(WA2)B1 B2
A2
DB_BUS
ANSI04000511 V1 EN
Figure 272: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
BB_DC_OP All disconnectors of this part of the busbar are open.
VP_BB_DC The switch status of all disconnectors on this part of the busbar are valid.
EXDU_BB No transmission error from any bay 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.
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
disconnectors 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.
1MRK504116-UUS C Section 3
IED application
647
Application manual