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    K27 Fire Resisting Control Cables (CR1-C1 Class)

    • K27 Fire Resisting Control Cables (CR1-C1 Class)
    • K27 Fire Resisting Control Cables (CR1-C1 Class)

    Application

    The cables are designed for provide circuit integrity for safety lightning, smoke extraction, ventilation, emergency telephone and exits during fi re for underground railways.

    Standard

    • RATP K27 specifi cation
    • Fire resistant: class CR1
    • No fi re propagation: class C1 RATP (<30cm)

    Cable Construction

    • Electrical Characteristics at 20℃Conductors: Class 1 solid conductor from 1.5mm to 4mm; class 2 stranded conductor for 6mm.
    • Insulation: Silicone rubber insulation.
    • Stranding: Cores are helically stranded in concentric layers.
    • Inner Sheath: LSZH.
    • Armour: Two layers of steel tape.
    • Outer Sheath: LSZH.
    Number of strands/Nominal Conductor Diameter mm 7/1.04 1/1.39 1/1.79 1/2.25
    Nominal Cross Section Area mm 6 1.5 2.5 4
    Nominal Insulation Thickness mm 1.0 0.8 1.0 1.0
    Operating Voltage V 300/500

    Mechanical and Thermal Properties

    • Minimum Bending Radius: 5×OD (static); 10×OD (dynamic)
    • Temperature Range: -10℃ to +90℃ (during operation); -10℃ to +60℃ (during installation)

    Dimensions and Weight

    Cable Code Number of
    Cores
    Nominal Sheath Thickness
    mm
    Maximum Overall
    Diameter
    mm
    Nominal
    Weight
    kg/km
    Inner Outer
    7/1.04mm Conductor, 4.76mm Insulated Wire
    RS/K27-SZ1F3Z1-U(AS+)-2G6 2 1.0 1.5 17.0 406
    1/1.39mm Conductor, 2.99mm Insulated Wire
    RS/K27-SZ1F3Z1-U(AS+)-2G1.5 2 1.0 1.5 11.3 200
    RS/K27-SZ1F3Z1-U(AS+)-3G1.5 3 1.0 1.5 12.5 237
    RS/K27-SZ1F3Z1-U(AS+)-12G1.5 12 1.0 1.5 18.9 596
    1/1.79mm Conductor, 3.79mm Insulated Wire
    RS/K27-SZ1F3Z1-U(AS+)-2G2.5 2 1.0 1.5 13.2 265
    RS/K27-SZ1F3Z1-U(AS+)-3G2.5 3 1.0 1.5 13.5 309
    1/2.25mm Conductor, 4.26mm Insulated wire
    RS/K27-SZ1F3Z1-U(AS+)-2G4 2 1.0 1.5 14.7 325
    RS/K27-SZ1F3Z1-U(AS+)-3G4 3 1.0 1.5 15.6 411

     

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