MD4 Medium Distance Trackside Telecom Cables

 

Applications :

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

Standards :

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

 

Construction :

  • CT2328 Type (Main Cables)
  • Conductors : Sol id copper, 0.8mm nominal diameter.
  • 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 °C :

  • 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 :

  • Minimum Bending Radius : 10×OD.
  • Temperature Range : -40°C to +60°C (during operation); -10°C +60°C (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

 

 

 

UV Resistant
Water Resistant
Rated voltage
Buried in Ciround
Laid In Ducts
Zero Halogen
IEC 60754-1/NF C20-454
EN 50267-2-1