Application
The cables are designed for long distance telecom links on optical fi bres along railway tracks. The cables are suitable for installation directly in channels or buried.
Standards
● SNCF CT 2242.6.1
Construction
Fibres
Singlemode optical fibres G652 coloured (6 or 12 per tube).
Central Strength Member
Non-metallic central reinforcement (FRP).
Tube
PBT polyester tubes containing fibres.
Filling
Petroleum jelly with water-swelling yarns to provide longitudinal watertightness.
Inner Sheath
Low density polyethylene.
Armour
0.25mm thick corrugated steel tape armour.
Outer Sheath
Low density polyethylene.
Electrical Characteristics at 20℃
| Maximum Attenuation |
|
G652 |
| @1310nm |
dB/km |
0.35 |
| @1550nm |
dB/km |
0.22 |
| Maximum Chromatic Dispersion |
|
|
| Between 1260 and 1360nm |
ps/(nm/km) |
3.5 |
| Between 1530 and 1565nm |
ps/(nm/km) |
19 |
| Zero Dispersion Wavelength |
nm |
1310±11 |
| Zero Dispersion Slope |
ps/(nm2.km) |
0.09 |
| Numerical Aperture |
|
0.14 |
| Point discontinuity |
dB |
0.1 |
| PMD (individual fi ber) |
ps/km |
0.2 |
| Maximum Cutoff Wavelength |
nm |
1260 |
| Cladding Diameter |
um |
125±1 |
| Core/Cladding Concentricity Error |
um |
≤0.5 |
| Cladding Non Circularity |
% |
≤1 |
| Coating Non Circularity |
% |
≤6 |
| Proof Test Level |
Kpsi (GN/m2) |
100 (0.7) |
| Crush Resistance |
N/cm |
450 |
| Maximum Laying Tension |
N |
3000 |
Mechanical and Thermal Properties
Minimum Bending Radius: 310mm.
Temperature Range: -40℃ to +70℃ (during operation); -10℃ +70℃ (during installation)
Dimensions And Weight
Cable Code |
No. of fibres |
Nominal Sheath
Thickness
mm |
Nominal Overall
Diameter
mm |
Nominal Weight
kg/km |
RO2242-ML-C-9-Tn×Fn-SR-2Y(STA)2Y |
1-36 |
1.5 |
14.5 |
260 |
RO2242-ML-C-9-Tn×Fn-SR-2Y(STA)2Y |
48-72 |
1.5 |
16.5 |
300 |
RO2242-ML-C-9-Tn×Fn-SR-2Y(STA)2Y |
80-144 |
1.5 |
22.0 |
510 |
