Single Circuit Breaker With Double Busbar, External Voltage Selection; Single Circuit Breaker With Double Busbar, Internal Voltage Selection - ABB REQ650 Applications Manual

1MRK 505 383-UEN A
9.1.3.2
9.1.3.3
Breaker protection REQ650 2.2 IEC
Application manual

Single circuit breaker with double busbar, external voltage selection

WA1
WA2
WA2_MCB
WA1_MCB
IEC10000094 V4 EN-US
Figure 55: Connection of SESRSYN function block in a single breaker, double
busbar arrangement with external voltage selection
In this type of arrangement no internal voltage selection is required. The voltage
selection is made by external relays typically connected according to figure 55.
Suitable voltage and VT fuse failure supervision from the two busbars are selected
based on the position of the busbar disconnectors. This means that the connections
to the function block will be the same as for the single busbar arrangement. The
voltage selection parameter CBConfig is set to No voltage sel.

Single circuit breaker with double busbar, internal voltage selection

WA1
WA2
WA1_MCB
QB1
QB2
QA1
LINE
IEC10000095 V4 EN-US
Figure 56: Connection of the SESRSYN function block in a single breaker,
double busbar arrangement with internal voltage selection
WA1_MCB / WA2_MCB
QB1
QB2
WA1_VT / WA2_VT
LINE_MCB
QA1
LINE_VT
LINE
WA1_MCB
WA2_MCB
WA1_VT
WA2_VT
QB1
QB2
LINE_MCB
LINE_VT
Section 9
Control
WA1_VT/
SESRSYN
WA2_VT
U3PBB1*
GRP_OFF
U3PBB2*
LINE_VT
U3PLN1*
U3PLN2*
WA1_MCB/
WA2_MCB UB1OK
UB1FF
LINE_MCB
ULN1OK
ULN1FF
IEC10000094-4-en.vsd
SESRSYN
WA1_VT
U3PBB1*
WA2_VT
U3PBB2*
LINE_VT
U3PLN1*
U3PLN2*
GRP_OFF
B1QOPEN
QB1
B1QCLD
QB2 B2QOPEN
B2QCLD
UB1OK
WA1_MCB
UB1FF
UB2OK
WA2_MCB
UB2FF
ULN1OK
LINE_MCB
ULN1FF
IEC10000095-6-en.vsd
M12325-3 v8
M12326-3 v7
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