35KV triple-layer co-extrusion ccv line&Extruding Machine 

Main technical specification

1.1 Voltage Class    XLPE 6~35kV

1.2 Conductor         25~630mm² Cu

                             35~800mm² Al

1.3 Cable weight       max. 10 kg/m

1.4 Cable diameter     max. 70 mm

1.5 Cable construction          

    Conductor shield    0.5~2mm

    Insulation              3.4~12mm

    Insulation shield     0.5~2mm

1.6  Material

    Conductor: compressed Cu, aluminium stranded conductor

    Conductor shield: cross-linking conductor screening material

    Insulation: XLPE

    Insulation shield: strippable insulation screening material (35kV or below)

                  free-strippable insulation screening material (35kV)

1.7  Line design speed: 0~30m/min.

1.8  Line execution: half catenary

                Inclination of cooling section: 1°~ 2°

                Catenary factor: 200~150

                Length of cross-linking section: about 59 m

                                  material: SS 304φ219×4

                Design temperature: max. 450

                Length of pre-cooling section: 12 m

                                material: SS304 φ219×4             

                 Length of cooling section: 96m

                Material: SS304 φ140×4

                (the first section of cooling tube isφ219×4)

                Design pressure: 1.6 MPa

1.9  Extruders arrangement:

      φ80-φ175-φ100  triple extrusion

      φ80   for conductor screen

      φ175  for cross linked polyethylene(XLPE)

      φ100   for insulation screen

1.10 Pressurized medium in pipe: nitrogen

1.11 Cooling medium in pipe: water

1.12 Kinetic energy consumption:

       Electricity: installation capacity 1050 kVA

       380V±10%, 50Hz±1%, three-phase and four-wire

       Water: water pressure: 0.2~0.6 MPa

       Water consumption: 15m³/h (circulating water from reservoir)

       Compressed air: 0.6~0.8 MPa

       Air consumption: 0.8m³/min

       Nitrogen: pressure 2.0~2.5 MPa

        purity 99.5%

        consumption: 1~2m³/h (standard state)

It is necessary to prepare a nitrogen storage container no less than 2*6m³ to start up the line.