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Reeling & Trailing Cable Material Characteristics

 

A. Conductor Screen :

  • All cables with a voltage rating of 3.3/3.3 kV and above have a cross-linked semiconductive elastomeric material extruded directly over the power core conductor through a triple extrusion process. Textile-reinforced emiconductive tape or water barrier (water-proof) tape can be applied on special request or particular purposes.

B. Insulation Screen :

  • Semicoductive elastomer screen: The material used for insulation screen is cross-linked semiconductive elastomeric which directly applied over insulation of each power core.
  • Textile reinforced semiconductive tape screen: As an alternative to an elastomer screen, the textilereinforced semiconductive tape screen may be applied over the insulation of power cores of 3.3/3.3kV Type 450 & 451 (Class 1) and 3.3/3.3kV up to and including 11/11kV Type 409 & 440 (Class 2). The semiconductive tape comprises a textile fabric, coated with a semiconductive elastomer and having a continuous print on one side identifying it as being semiconductive.

C. Cradle separators / Earth Covering / Screen for Core Assembly :

  • Semiconductive elastomer used in cradle separators, the interstitial earth conductor covering (other than for Type 412) and the screen for core assembly (Types 241, 245, 275 and 441 only) is a compound based on polychloroprene (PCP) which complies with the table below.
  • Test (per AS/NZS1802 / AS/NZS 2802) Specified Value
    A Mechanical tests without ageing  
    1 Tensile strength (MPa) ≥8.5
    2 Elongation at rupture (percent) ≥200
    3 Permanent set (percent) ≤ 20
    B Mechanical tests after ageing in air oven  
    1 Tensile strength (MPa) ≥ 6.2
    2 Elongation at rupture (percent) ≥ 50
    C Volume resistivity at 23℃ (Ω.m) ≤1.0

D. Power / Pilot Core Insulation :

  •   AS /NZS 1802 reeling and trailing cable AS /NZS 2802 reeling and trailing cable
    Power Core Insulation R-EP-90

    XR-EP-90 (for class 1 cables)

    R-EP-90 (for class 2 cables)

    Pilot Core Insulation R-EP-90 XR-EP-90/R-EP-90
  • R-EP-90: a cross-linked compound based on ethylene propylene copolymer, terpolymer or a blend of the two, suitable for up to 90℃ maximum continuous operating temperature.
  • XR-EP-90: a cross-linked compound based on ethylene propylene copolymer (EPM), or ethylene propylene terpolymer (EPDM or EPT),having enhanced properties compares with R-EP-90, suitable for up to 90℃ maximum continuous operating temperature.
  • Test (per AS/NZS 1802/AS/NZS 2802) R-EP-90 XR-EP-90
    A Mechanical tests without ageing    
    1 Tensile strength (MPa) ≥4.2 ≥ 8.5
    2 Elongation at rupture (percent) ≥200 ≥200
    B Mechanical tests after ageing in air oven    
    1 Tensile strength (percentage of values found in unaged specimens) ≥70 ≥75
    2 Elongation at rupture (percentage of values found in unaged specimens) ≥70 ≥75
    C Hot set test    
    1 Elongation under load (percent) ≤ 175 ≤ 175
    2 Residual elongation after cooling (percent) ≤ 15 ≤ 15
    D Electrical characteristics ≤1.1/1.1kV ≥3.3/3.3kV  
    1 Insulation resistance constant (ki) at room temperature (GΩ.m) ≥1500 ≥4000 ≥4000
    2 Insulation resistance constant (ki) at 90℃ (GΩ.m) ≥1.5 ≥4.0 ≥ 4.0

E. Metallic Composite Screen :

  • Composite screen consists of tinned annealed copper interwoven with polyester yarn and each strand consists of seven copper wires with nominal diameter between 0.25 and 0.5mm to form a braid.

F. Pliable Steel Strand Armour :

  • Pliable amour comprises galvanized low carbon (mild) steel strands, each strand consist of seven wires helically over the inner sheath to provide close cover. The wires comply with the requirements of AS/NZS 3863.

G. Sheath :

  • Inner sheath (Type 206 and 412 only): GP-85-PCP (Standard), GP-90-CSP or GP-90-CPE to AS/NZS 3803.
    Outer sheath:
  • AS1802 reeling and trailing cable HD-85-CSP,HD-90-PCP or HD-90-CPE to AS/NZS 3808
    AS2802 reeling and trailing cable HD-85-CSP,HD-90-PCP or HD-90-CPE to AS/NZS 3808 (for class 2 cable);
    XHD-85-CSP,XHD-90-PCP or XHD-90-CPE to AS/NZS 3808 (for class 1 cable)
  • GP-85-PCP: General purpose cross-linked compound based on Polychloroprene, suitable for up to 85℃ maximum continuous operating temperature.
  • GP-90-CSP: General purpose cross-linked compound based on chlorinated polyethylene, suitable for up to 90℃ maximum continuous operating temperature.
  • GP-90-CPE: General purpose cross-linked compound based on Chlorosulphonated polyethylene, suitable for up to 90℃ maximum continuous operating temperature.
  • HD-85-PCP, HD-90-CSP or HD-90-CPE is the heavy duty version of GP-85-PCP, GP-90-CSP or GP-90-CPE, and XHD is the extra-heavy duty version, the characteristic is as follow:
  • Test (except for D and E, per AS/NZS 1802/AS/NZS 2802) GP-85-PCP HD-85-PCP XHD-85-PCP
    A Mechanical tests without ageing      
    1 Tensile strength (MPa) ≥8.5 ≥11 ≥12.5
    2 Elongation at rupture (percent) ≥250 ≥250 ≥300
    3 Tear resistance (N/mm) – ≥ 5 ≥7
    B Mechanical tests after ageing in air oven      
    1 Tensile strength (MPa) ≥6.2 ≥8.5 ≥8.5
    2 Elongation at rupture (percent) ≥125 ≥125 ≥150
    C Oil immersion test      
    1 Tensile strength (percentage of values found in unaged specimens) ≥60 ≥60 ≥ 60
    2 Elongation at rupture (percentage of values found in unaged specimens) ≥60 ≥60 ≥60
    D Hot set test at 200±3℃, 200kPa for 15mins      
    1 Elongation under load, maximum (percent) ≤175 ≤175 ≤175
    2 Elongation after cooling, maximum (percent) ≤20 ≤20 ≤20
    E Oxygen index – – –