13.1.3.2 Single circuit breaker with double busbar, external voltage selection M12325-3 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 93: Connection of SESRSYN function block in a single breaker, double busbararrangement with external voltage selectionIn this type of arrangement no internal voltage selection is required. The voltage selection ismade by external relays typically connected according to figure 93. Suitable voltage and VTfuse failure supervision from the two busbars are selected based on the position of the busbardisconnectors. This means that the connections to the function block will be the same as forthe single busbar arrangement. The voltage selection parameterCBConfig is set toNo voltagesel.13.1.3.3 Single circuit breaker with double busbar, internal voltage selection M12326-3 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 94: Connection of the SESRSYN function block in a single breaker, double busbararrangement with internal voltage selectionWhen internal voltage selection is needed, the voltage transformer circuit connections aremade according to figure 94. The voltage from the busbar 1 VT is connected to U3PBB1 and thevoltage from busbar 2 is connected to U3PBB2. The voltage from the line VT is connected toU3PLN1. The positions of the disconnectors and VT fuses shall be connected as shown infigure 94. The voltage selection parameterCBConfig is set toDouble bus.1MRK 511 358-UEN A Section 13Control231Application manual
