ABB REB670 Series - Single circuit breaker with double busbar, internal voltage selection; Double circuit breaker

12.1.3.3 Single circuit breaker with double busbar, internal voltage selection
M12326-3 v7
WA1
WA2
QB1
QB2
LINE
QA1
IEC10000095-6-en.vsd
WA1_MCB
WA2_MCB
LINE_VT
LINE_MCB
WA1_MCB
WA1_VT
WA2_VT
QB2
QB1
GRP_OFF
SESRSYN
U3PBB1*
U3PBB2*
U3PLN1*
U3PLN2*
B1QOPEN
B1QCLD
B2QOPEN
B2QCLD
UB1OK
UB1FF
UB2OK
UB2FF
ULN1OK
ULN1FF
WA1_VT
WA2_VT
LINE_VT
QB1
QB2
WA1_MCB
WA2_MCB
LINE_MCB
IEC10000095 V4 EN-US
Figure 127: Connection of the SESRSYN function block in a single breaker, double busbar
arrangement with internal voltage selection
When internal voltage selection is needed, the voltage transformer circuit connections are
made according to figure 127. The voltage from the busbar 1 VT is connected to U3PBB1 and
the voltage from busbar 2 is connected to U3PBB2. The voltage from the line VT is connected
to U3PLN1. The positions of the disconnectors and VT fuses shall be connected as shown in
figure
127. The voltage selection parameter CBConfig is set to Double bus .
12.1.3.4 Double circuit breaker
M12329-3 v7
WA1
WA2
WA1_QA1
WA2_QA1
LINE
WA1_MCB
WA2_
MCB
LINE_MCB
LINE_MCB
WA1_VT
WA1_QA1
GRP_OFF
SESRSYN
U3PBB1*
U3PBB2*
U3PLN1*
U3PLN2*
WA1_VT
LINE_VT
UB1OK
UB1FF
ULN1OK
ULN1FF
WA1_MCB
LINE_MCB
WA2_QA1
GRP_OFF
SESRSYN
U3PBB1*
U3PBB2*
U3PLN1*
U3PLN2*
WA2_VT
LINE_VT
UB1OK
UB1FF
ULN1OK
ULN1FF
WA2_MCB
LINE_MCB
WA2_MCB
WA1_MCB
WA2_VT
LINE_VT
IEC10000096-6-en.vsd
IEC10000096 V4 EN-US
Figure 128: Connections of the SESRSYN function block in a double breaker arrangement
A double breaker arrangement requires two function blocks, one for breaker WA1_QA1 and one
for breaker WA2_QA1. No voltage selection is necessary, because the voltage from busbar 1 VT
is connected to U3PBB1 on SESRSYN for WA1_QA1 and the voltage from busbar 2 VT is
Section 12 1MRK 505 370-UEN D
Control
256 Busbar protection REB670
Application manual