Railway Cables | ||||||||||||
G7621 Trackside Communications Cables
Application
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℃
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℃ to +70℃ (during operation); -10℃ +55℃ (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 |
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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 |
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RS7621A2/T1-02YY-1P0.9 |
1 |
2.5 |
8.0 |
70 |
RS7621A2/T1-02YY-3P0.9 |
3 |
2.5 |
10.0 |
120 |