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    SPFB Speed Control System Cables

    • SPFB Speed Control System Cables
    • SPFB Speed Control System Cables

    Application

    The cables are used for the train speed control system (French system KVB). The cables are laid along railway lines and connect the speed sensors (located between the rails) to the encoder located inside the trackside equipment shelter.

    Standard

    • SNCF CT 446

    Cable Construction

    • Electrical Characteristics at 20℃Conductors: Class 2 stranded tinned copper.
    • Insulation: Solid polyethylene.
    • Cabling Element: Twisted pair.
    • Inner Sheath: Low density polyethylene.
    • Armour: Galvanized steel braid armour.
    • Outer Sheath: Flame Retardant PVC.
    Nominal Conductor Diameter mm 0.8
    Nominal Cross Section Area mm 0.5
    Maximum Conductor Resistance (DC) Ω/km 36
    Characteristic Impedance @100KHz Ω 120
    Maximum Attenuation @50KHz dB/km 5
    Nominal Insulation Thickness mm 0.55
    Operating Voltage V 500

    Mechanical and Thermal Properties

    • Minimum Bending Radius: 8×OD (static); 16×OD (dynamic)
    • Temperature Range: -30℃ to +70℃ (during operation); -20℃ to +50℃ (during installation)

    Dimensions and Weight

    Cable Code No. of cores& Nominal
    Conductor Cross
    Sectional Area
    No.×mm
    No. & Nominal
    Diameter of
    Strands
    No/mm
    Nominal Sheath Thickness
    mm
    Nominal Overall
    Diameter
    mm
    Nominal Weight
    kg/km
    Inner Outer
    RS/SPFB-2Y2Y(SWB)2Y-2C0.5S 2 x 0.5 7/0.32 1.0 1.5 9.1 97

     

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