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).
Standard
- LUL Spec G7621 A2 type 1 (for PVC sheath)
- LUL Spec G7621 A2 type 2 (for LSZH sheath)
Cable 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 |
