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    ZCO3 Main Signalling Cables (AC Electrified High Speed Lines)


    The cables are designed for connection between traffic control centers and equipment shelters along the trackside. The cables are specially designed to give good induction protection (R.F=0.21 at inductive voltage 100V/km) and are suitable for installation in high speed railway lines electrifi ed at 25KV ac.


    SNCF CT 445

    NF F 55-698


    Conductors : Solid annealed copper, 1.0 mm² nominal cross section area.

    Insulation : Solid polyethylene.

    Cabling Element : Four conductors are twisted to form a quad.

    Stranding : Quads are helically stranded to get the cable core.

    Core Wrapping : Plastic tape(s) with overlapping.

    Inner Sheath : Low density polyethylene. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).

    Electrostatic Shield : Corrugated copper tape.

    Intermediate Sheath : Low density polyethylene. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).

    Electromagnetic Shield : Two helically applied steel tapes (0.5mm).

    Outer Sheath : PE/PVC compound. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).

    Remarks : ZCO3 : PE/PVC Sheath ; ZCO3-SH : LSZH Sheath.

    Electrical Characteristics at 20℃

    Nominal Conductor Diameter mm 1.13
    Nominal Cross Section Area mm² 1.0
    Maximum Conductor Resistance (DC) Ω/km 18.1
    Minimum Insulation Resistance @500 V DC (3mins) MΩ.km 5000
    Maximum Mutual Capacitance @1000Hz (AC) nF/km 40
    Maximum Capacitance Unbalance @800Hz pF/500m 400
    Dielectric Strength, conductor to conductor (DC voltage 3mins) V 4500
    Operating Voltage AC/DC V 450/750

    Reduction Factor

    Inductive voltage(V/km) 50 70 100 370 400 470
    Reduction factor @50Hz 0.42 0.30 0.20 0.16 0.18 0.31

    Mechanical and Thermal Properties

    Minimum Bending Radius : 8×OD (static) ; 16×OD (dynamic)

    Temperature Range : -40℃ to +70℃ (during operation) ; -20℃ to +50℃ (during installation)

    Dimensions and Weight

    Cable Code No. of Quads Nominal Sheath Thickness Nominal Overall Diameter Nominal Weight
    Inner Interm. Outer
        mm mm mm mm kg/km
    1.13mm Conductor, 2.33 Insulated Wire
    RS/ZCO3-2Y2Y(K)2YB2Y-2Q1S 2 0.8 1.0 1.6 27.0 1295
    RS/ZCO3-2Y2Y(K)2YB2Y-4Q1S 4 0.8 1.0 1.6 29.5 1490
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