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 |
Nominal Overall Diameter |
Nominal Weight |
| |
|
mm |
mm |
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 |
