14.2.11.2 FunctionalityThe interlocking for transformer bay (AB_TRAFO) function is used for a transformerbay connected to a double busbar arrangement according to figure 327. The functionis used when there is no disconnector between circuit breaker and transformer.Otherwise, the interlocking for line bay (ABC_LINE) function can be used. Thisfunction can also be used in single busbar arrangements.QB1 QB2QC1QA1QC2WA1 (A)WA2 (B)QA2QC3TQC4QB4QB3QA2 and QC4 are notused in this interlockingAB_TRAFOen04000515.vsdIEC04000515 V1 ENFigure 327: Switchyard layout AB_TRAFOSection 14 1MRK502052-UEN BControl698Technical manual
