Application; Signals In Single Breaker Arrangement - ABB Relion REC670 Applications Manual

1MRK 511 358-UEN A
13.4.6.1

Application

The interlocking for bus-section disconnector (A1A2_DC) function is used for one bus-section
disconnector between section 1 and 2 according to figure 127. A1A2_DC function can be used
for different busbars, which includes a bus-section disconnector.
WA1 (A1)
IEC04000492 V1 EN-US
Figure 127: Switchyard layout A1A2_DC
The signals from other bays connected to the module A1A2_DC are described below.
13.4.6.2

Signals in single breaker arrangement

If the busbar is divided by bus-section disconnectors, the condition
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.
(WA1)A1
(WA2)B1
(WA7)C
IEC04000493 V1 EN-US
Figure 128: Busbars divided by bus-section disconnectors (circuit breakers)
To derive the signals:
Signal
S1DC_OP
S2DC_OP
VPS1_DC
VPS2_DC
EXDU_BB
These signals from each line bay (ABC_LINE), each transformer bay (AB_TRAFO), and each bus-
coupler bay (ABC_BC) are needed:
Application manual
QB
QC1
A1A2_DC
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
ABC_LINE AB_TRAFO
All disconnectors on bus-section 1 are open.
All disconnectors on bus-section 2 are open.
The switch status of disconnectors on bus-section 1 is valid.
The switch status of disconnectors on bus-section 2 is valid.
No transmission error from any bay that contains the above information.
WA2 (A2)
QC2
en04000492.vsd
Section 2 A2
B2
ABC_BC
ABC_LINE
no other disconnector
A3
B3
C
AB_TRAFO
en04000493.vsd
Section 13
Control
M13544-3 v7
M13542-4 v4
M13542-6 v5
283