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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 | ||||
| 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 |