In the voltage designation of U0/U(Um), The rated voltages of the cables considered in IEC standard are as follows: U0/U(Um)= 6/10(12) - 12/20(24) - 18/30(36)KV Construction features: -Conductor size : Up to 240 sq.mm - No. of cores : Three -Conductor material: Aluminum -Conductor type: Compacted Round stranded -Conductor screen : Semi-conductive compound -Insulation screen : Semi-conductive compound -Metallic screen : Copper wires, Copper tape or combination of wires & tape -Sheath: Black Polyvinyl chloride (PVC) or high density polyethylene ( HDPE) -Messenger :Bare or insulated galvanized stranded steel wires. -Design: MV Aerial bundled cables are made of three XLPE insulated cores assembled around an insulated or bare steel messenger. Other features : -Ultra violet (UV) resistant -Low smoke and fume (LSF) -Halogen free and flame retardant (HFFR) Standards : IEC60502-2, AS 3599
U0 is the rated power frequency voltage between conductor and earth or metallic screen.
U is the rated power frequency voltage between conductors.
Um is the maximum value of the "highest system voltage" for which the equipment may be used.
-Insulation: Cross-linked polyethylene (XLPE)