9.1.3.2 Single circuit breaker with double busbar, external voltage selectionM12325-3 v8WA1WA2QB1QB2LINEQA1IEC10000094-4-en.vsdWA2_MCBWA1_MCBLINE_VTLINE_MCBSESRSYNU3PBB1*U3PBB2*U3PLN1*U3PLN2*GRP_OFFUB1OKUB1FFULN1OKULN1FFWA1_VT/WA2_VTLINE_VTLINE_MCBWA1_MCB/WA2_MCBWA1_MCB / WA2_MCBWA1_VT / WA2_VTIEC10000094 V4 EN-USFigure 55: Connection of SESRSYN function block in a single breaker, doublebusbar arrangement with external voltage selectionIn this type of arrangement no internal voltage selection is required. The voltageselection is made by external relays typically connected according to figure 55.Suitable voltage and VT fuse failure supervision from the two busbars are selectedbased on the position of the busbar disconnectors. This means that the connectionsto the function block will be the same as for the single busbar arrangement. Thevoltage selection parameter CBConfig is set to No voltage sel.9.1.3.3 Single circuit breaker with double busbar, internal voltage selectionM12326-3 v7WA1WA2QB1QB2LINEQA1IEC10000095-6-en.vsdWA1_MCB WA2_MCBLINE_VTLINE_MCBWA1_MCBWA1_VTWA2_VTQB2QB1GRP_OFFSESRSYNU3PBB1*U3PBB2*U3PLN1*U3PLN2*B1QOPENB1QCLDB2QOPENB2QCLDUB1OKUB1FFUB2OKUB2FFULN1OKULN1FFWA1_VTWA2_VTLINE_VTQB1QB2WA1_MCBWA2_MCBLINE_MCBIEC10000095 V4 EN-USFigure 56: Connection of the SESRSYN function block in a single breaker,double busbar arrangement with internal voltage selection1MRK 505 383-UEN A Section 9ControlBreaker protection REQ650 2.2 IEC 141Application manual
