G7621 Trackside Communications Cables

 

Applications :

  • The cables are designed for installation in trackside bracket runs and for use in open locations (type1) or in tunnels or underground locations (type2).

Standards :

  • LUL Spec G7621 A2 type 1 (for PVC sheath)
  • LUL Spec G7621 A2 type 2 (for LSZH sheath)
 

 

Construction :

  • Conductors : Solid plain copper, 0.63/0.9 mm nominal diameter.
  • Insulation : Cellular polyethylene.
  • Cabling Element : Two insulated conductors are twisted together to form a pair.
  • Core Wrapping : Non-hygroscopic plastic tape with overlapping.
  • Outer Sheath : PVC/LSZH sheath, coloured violet.

Core Identification :

  • 1 Pair Cable : Blue/White
  • 3 Pair Cable : Blue/White    Orange/White     Green/White

Electrical Characteristics at 20 °C :

  • Nominal Conductor Diameter mm 0.63 0.9
    Maximum Conductor Resistance
        Average Value Ω/km 57.5 28
        Individual Value Ω/km 59 29
    Minimum Insulation Resistance @500 V DC MΩ.km 1500 1500
    Maximum Average Mutual Capacitance nF/km 59 59
    Maximum Average Capacitance Unbalance
        Pair to Pair pF/460m 100 100
        Pair to Earth pF/460m 1200 1200

Mechanical and Thermal Properties :

  • Minimum Bending Radius : 7.5×OD.
  • Temperature Range : -30°C to +70°C (during operation); -10°C +55°C (during installation).

Dimensions and Weight :

 

Cable Code No. of pairs Nominal Thickness of Sheath
mm
Nominal Overall Diameter
mm
Nominal Weight
kg/km
0.63mm Conductor, 1.15mm Insulated Wire
RS7621A2/T1-02YY-1P0.63 1 2.5 7.0 60
RS7621A2/T1-02YY-3P0.63 3 2.5 9.0 90
0.9mm Conductor, 1.5mm Insulated Wire
RS7621A2/T1-02YY-1P0.9 1 2.5 8.0 70
RS7621A2/T1-02YY-3P0.9 3 2.5 10.0 120

 

 

Mineral Oil Resistant
Rated voltage
Buried in Ciround
Laid In Ducts

 

 

PVC
Sheath
Flame Retardant
NF C32-070-2.1(C2)
IEC 60332-1/EN 50265-2-1
 

 

 

LSZH
Sheath
Flame Retardant
NF C32-070-2.1(C2)
IEC 60332-1/EN 50265-2-1
Fire Retardant
NF C32-070-2.2(C1)
IEC 60332-3/EN50266
Zero Halogen
IEC 60754-1/NF C20-454
EN 50267-2-1
Low Toxicity
   
   
Low Smoke Emission
IEC 61034/NFC20-902
EN 50268/NF C32-073
Low Corrosivity
EN 50267-2-2/NF C32-074
IEC 60754-2/NF C20-453