12.2.5.2 FunctionalityThe interlocking for 1 1/2 breaker diameter (BH_CONN, BH_LINE_A,BH_LINE_B) functions are used for lines connected to a 1 1/2 breaker diameteraccording to figure 135.WA1 (A)WA2 (B)QB1QC1QA1QC2QC9QB6QB9QB2QC1QA1QC2QC3QB6QC3QB62QB61 QA1QC1 QC2QC9QB9BH_LINE_A BH_LINE_BBH_CONNen04000513.vsdIEC04000513 V1 ENFigure 135: Switchyard layout 1 1/2 breakerThree types of interlocking modules per diameter are defined. BH_LINE_A andBH_LINE_B are the connections from a line to a busbar. BH_CONN is theconnection between the two lines of the diameter in the 1 1/2 breaker switchyardlayout.Section 12 1MRK 504 135-UEN AControl290Technical manual
