GE Multilin B90 Low Impedance Bus Differential System C-19APPENDIX C C.5 IEC 61850 IMPLEMENTATION VIA ENERVISTA UR SETUPC• Header.• Substation.• Communication.• IED section (one or more).• DataTypeTemplates.The root file structure of an SCD file is illustrated below.Figure C–6: SCD FILE STRUCTURE, SCL (ROOT) NODELike ICD files, the Header node identifies the SCD file and its version, and specifies options for the mapping of names tosignals.The Substation node describes the substation parameters:Figure C–7: SCD FILE STRUCTURE, SUBSTATION NODE842791A1.CDRSCLHeader (id, version, revision, toolID, nameStructure)IED Section (IED 2)CommunicationIED Section (IED 1)SubstationOther IED SectionsDataTypeTemplates842792A1.CDRSubstationEquipmentContainerVoltageLevelFunctionPowerSystemResourcePower TransformerGeneralEquipmentEquipmentContainerBayVoltagePowerSystemResourceSubFunctionGeneralEquipment