Single Circuit Breaker With Double Busbar, External Voltage Selection; Single Circuit Breaker With Double Busbar, Internal Voltage Selection - ABB Relion REC670 Applications Manual

1MRK 511 358-UEN A
13.1.3.2

Single circuit breaker with double busbar, external voltage selection

WA1_MCB
IEC10000094 V4 EN-US
Figure 93: Connection of SESRSYN function block in a single breaker, double busbar
In this type of arrangement no internal voltage selection is required. The voltage selection is
made by external relays typically connected according to figure 93. 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
sel .
13.1.3.3

Single circuit breaker with double busbar, internal voltage selection

WA1
WA1_MCB
IEC10000095 V4 EN-US
Figure 94: Connection of the SESRSYN function block in a single breaker, double busbar
When internal voltage selection is needed, the voltage transformer circuit connections are
made according to figure 94. 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 94. The voltage selection parameter
Application manual
WA1
WA2
WA2_MCB
QB1
QB2
QA1
LINE
arrangement with external voltage selection
WA2
QB1
QB2
QA1
LINE
arrangement with internal voltage selection
WA1_VT/
WA2_VT
GRP_OFF
LINE_VT
WA1_MCB/
WA1_MCB / WA2_MCB
WA2_MCB
LINE_MCB
WA1_VT / WA2_VT
LINE_MCB
LINE_VT
WA1_MCB
WA1_VT
WA2_MCB
WA2_VT
LINE_VT
WA1_VT
WA2_VT
GRP_OFF
QB1
QB1
QB2
QB2
WA1_MCB
LINE_MCB
WA2_MCB
LINE_MCB
LINE_VT
CBConfig is set to Double bus .
Section 13
SESRSYN
U3PBB1*
U3PBB2*
U3PLN1*
U3PLN2*
UB1OK
UB1FF
ULN1OK
ULN1FF
IEC10000094-4-en.vsd
CBConfig is set to No voltage
SESRSYN
U3PBB1*
U3PBB2*
U3PLN1*
U3PLN2*
B1QOPEN
B1QCLD
B2QOPEN
B2QCLD
UB1OK
UB1FF
UB2OK
UB2FF
ULN1OK
ULN1FF
IEC10000095-6-en.vsd
Control
M12325-3 v8
M12326-3 v7
231