ABB Relion 670 series - Interlocking for Bus-Section Disconnector A1 A2_DC (3)

15.4.6 Interlocking for bus-section disconnector A1A2_DC (3)
15.4.6.1 Application
The interlocking for bus-section disconnector (A1A2_DC, 3) function is used for one bus-
section disconnector between section 1 and 2 according to figure
340. A1A2_DC (3)
function can be used for different busbars, which includes a bus-section disconnector.
WA1 (A1) WA2 (A2)
189G
289G
A1A2_DC
en04000492_ansi.vsd
52
ANSI04000492 V1 EN
Figure 340: Switchyard layout A1A2_DC (3)
The signals from other bays connected to the module A1A2_DC are described below.
15.4.6.2 Signals in single breaker arrangement
If the busbar is divided by bus-section disconnectors, the condition 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.
en04000493_ansi.vsd
Section 1 Section 2
A1A2_DC(BS)
B1B2_DC(BS)
ABC_LINE
ABC_BC
ABC_LINE
(WA1)A1
(WA2)B1
(WA7)C C
B3
A3
AB_TRAFO
AB_TRAFO
A2
B2
ANSI04000493 V1 EN
Figure 341: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 719
Application manual