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14.1.3.2
Single circuit breaker with double busbar, external voltage selection
M12325-3 v8
WA1
WA2
QB1
QB2
LINE
QA1
IEC10000094-4-en.vsd
WA2_MCB
WA1_MCB
LINE_VT
LINE_MCB
SESRSYN
U3PBB1*
U3PBB2*
U3PLN1*
U3PLN2*
GRP_OFF
UB1OK
UB1FF
ULN1OK
ULN1FF
WA1_VT/
WA2_VT
LINE_VT
LINE_MCB
WA1_MCB/
WA2_MCB
WA1_MCB / WA2_MCB
WA1_VT / WA2_VT
IEC10000094 V4 EN-US
Figure 313: 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
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.
14.1.3.3
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 314: 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
. 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
. The voltage selection parameter
CBConfig is set to Double bus.
1MRK 505 343-UEN B
Section 14
Control
525
Application manual
Summary of Contents for Relion 670 series
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