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) |
