Z1Z2Z4Z5QB1QA1B11B11QA1B12B11QA1Feeder 01 Bus-Interconnector 1 with two CTs Feeder 07-12QB11QB21QB2 QB1 QB2 QB10 QB20 QB1 QB2QB9QB7 QB7QB9QB1QA1B11Feeder 02-06QB2QB9QB7B11Bus-Interconnector 2 with one CTQB2QB7QB1Z3 Z3IEC16000144-1-en.vsdxSectionalizing disconnectorsIEC16000144 V1 EN-USFigure 74: Double busbar station with transfer bus and five protection zonesZ1Z2Z4Z5QB1QACT1Feeder 01-08QB11QB2bus-interconnector 1Z3 Z6QB21QB31...QB3 QB1 QB2 QB3 QB1 QB2 QB3CT1 CT2...QAbus-interconnector 2QB2 QB3 QB1 QB2 QB3CT4 CT5...QAQB2 QB3 QB1 QB2 QB3CT6 CT7...QAQACT8QB2 QB3Section 1 Section 2Sectionalizing disconnectorsbus-interconnector 3 Feeder 09-17IEC16000145-1.en.vsdxQB1 QB1 QB1IEC16000145 V1 EN-USFigure 75: Triple busbar station with two sections and six protection zonesZ1Z2QB1QA1CT1QB2Z3QB3Z4QB7BU1QB1QA1CT1QB2 QB3QB7QB20 QB30QB10QA1CT1QB1 QB2 QB30QB20 QB1QA1CT1QB2 QB3QB7BU1Z1Z2Z3Z4Feeder 01-07 Feeder 08-20IEC16000146-1.en.vsdxIEC16000146 V1 EN-USFigure 76: Triple busbar station with transfer bus and four protection zones6.1.5.3 Example engineering procedure GUID-8E5A800E-F88D-4C93-B837-78D257774D3B v1The procedure for how to engineer the triple busbar station with two sections and sixprotection zones (see Figure 75) will be presented here.Step 1: Allocation of protection zones1MRK 505 370-UUS A Section 6Differential protectionBusbar protection REB670 2.2 ANSI 157Application manual
