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    MD4 Medium Distance Trackside Telecom Cables

    Application

    The cables are designed for long distance of over 10km telecommunications alongside railway lines.

    Standard

    • SNCF CT 2328 (Main cables) /SNCT CT 2329 (Branch cables)

    Cable Construction


    Conductors: Solid copper, 0.8mm nominal diameterCT2328 Type (Main Cables)

    • Insulat ion: Coloured sol id polyethylene.
    • Cabling Element: Four conductors are twisted together to form a quad.
    • Possible Harness: Aluminium screen.
    • Filling: Petroleum jelly.
    • Screen: PE-copolymer coated aluminium tape.
    • Drain Wire: Tinned drain wire.
    • Inner Sheath: Low density polyethylene.
    • Screen: One corrugated copper tape.
    • Intermediate Sheath: Low density polyethylene.
    • Armour: Two helically applied steel tapes.
    • Outer Sheath: Low density polyethylene.
    • Optional

    • CT2329 Type (Branch Cables): For CT 2329 type, the cables have PE inner sheath, double corrugated steel tapes armour and PE outer sheath, without aluminium tape screen & copper tape.

    Electrical Characteristics at 20℃

    Nominal Conductor Diameter mm 0.8
    Maximum Conductor Resistance (DC) Ω/km 73.4
    Minimum Insulation Resistance @500 V DC (3mins) MΩ.km 15000
    Mutual Capacitance @800Hz nF/km 51
    Average Capacitance Unbalance    
    Main Cables    
    In quad pF/1450 m 50
    Between quads pF/1450 m 30
    Real-ground pF/1450 m 200
    Branch Cables    
    In quad pF/1450 m 100
    Between quads pF/1450 m 100
    Real-ground pF/1450 m 700
    Maximum Attenuation @1MHz dB/km 15.9
    Maximum Reduction Factor for Main Cables @100V/km 50Hz    
    14 quads   0.3
    21 quads   0.2
    28 quads   0.18
    Dielectric Strength (DC voltage 1min)    
    Conductor to Conductor V 1500
    Conductor to Screen V 3000

    Mechanical and Thermal Properties

    • Bending Radius: 10×OD
    • Temperature Range: -40℃ to +60℃ (during operation); -10℃ +60℃ (during installation)

    Dimensions and Weight

    CT2328 (Main cable)

    Cable Code No. of Quads Nominal Sheath Thickness
    mm
    Nominal Overall
    Diameter
    mm
    Nominal Weight
    kg/km
    Inner Interm. Outer
    0.8mm Conductor, 1.27mm Insulated Wire
    RS2328-2Y2Y(K)2YB2Y-14Q0.8 14 1.2 1.1 2.2 29.2 1332
    RS2328-2Y2Y(K)2YB2Y-21Q0.8 21 1.3 1.3 2.5 31.3 1655
    RS2328-2Y2Y(K)2YB2Y-28Q0.8 28 1.3 1.3 2.5 35.5 2013

    CT2328 (Main cables with screened quads)

    Cable Code No. of Quads Nominal Sheath Thickness
    mm
    Nominal Overall
    Diameter
    mm
    Nominal Weight
    kg/km
    Inner Interm. Outer
    0.8mm Conductor, 1.27mm Insulated Wire
    RS2328-2Y(L)2Y(K)2YB2Y-(14+7)Q0.8 14+7screen Quads 1.3 1.3 2.5 32.7 1765
    RS2328-2Y(L)2Y(K)2YB2Y-(18+3)Q0.8 18+3screen Quads 1.3 1.3 2.5 32.9 1783

    CT2329 (Branch cable)

    Cable Code No. of Quads Nominal Sheath Thickness
    mm
    Nominal Overall
    Diameter
    mm
    Nominal Weight
    kg/km
    Inner Outer
    0.8mm Conductor, 1.4mm Insulated Wire
    RS2329-2Y2YB2Y-4Q0.8 4 1.0 1.7 16.4 339
    RS2329-2Y2YB2Y-8Q0.8 8 1.2 1.8 18.8 477
    RS2329-2Y2YB2Y-14Q0.8 14 1.2 2.2 22.3 686
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