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Railway Cables
RAILSIG/RAILOPTICS/RAILDATA/RAILCOX Railway Telecom Cables
MD4 Medium Distance Trackside Telecom Cables
Application
MD4 Medium Distance Trackside Telecom Cable are designed for long distance of over 10km
telecommunications alongside railway lines.
Construction
CT2328 Type (Main Cables)
Conductors： Sol id copper, 0.8mm nominal diameter
Insulation： Coloured sol id polyethylene.
Cabling Element： Four conductors are twisted together to form a quad.
Possible Harness： Aluminium screen.
Filling： Petroleum jelly.
Screen： PE-copolymer coated aluminium tape.
Drain Wire： Tinned drain wire.
Inner Sheath： Low density polyethylene.
Screen： One corrugated copper tape.
Intermediate Sheath： Low density polyethylene.
Armour： Two helically applied steel tapes.
Outer Sheath： Low density polyethylene.
Optional
CT2329 Type (Branch Cables): For CT 2329 type, the cables have PE inner sheath, double corrugated steel
tapes armour and PE outer sheath, without aluminium tape screen & copper tape.
Reference Standards
SNCF CT 2328 (Main cables) /SNCT CT 2329 (Branch cables)
Electrical Characteristics at 20℃
| Nominal Conductor Diameter | mm | 0.8 |
|---|---|---|
| Maximum Conductor Resistance (DC) | Ω/km | 73.4 |
| Minimum Insulation Resistance @500 V DC (3mins) | MΩ.km | 15000 |
| Mutual Capacitance @800Hz | nF/km | 51 |
| Average Capacitance Unbalance | ||
| Main Cables | ||
| In quad | pF/1450 m | 50 |
| Between quads | pF/1450 m | 30 |
| Real-ground | pF/1450 m | 200 |
| Branch Cables | ||
| In quad | pF/1450 m | 100 |
| Between quads | pF/1450 m | 100 |
| Real-ground | pF/1450 m | 700 |
| Maximum Attenuation @1MHz | dB/km | 15.9 |
| Maximum Reduction Factor for Main Cables @100V/km 50Hz | ||
| 14 quads | 0.3 | |
| 21 quads | 0.2 | |
| 28 quads | 0.18 | |
| Dielectric Strength (DC voltage 1min) | ||
| Conductor to Conductor | V | 1500 |
| Conductor to Screen | V | 3000 |
Mechanical and Thermal Properties
Minimum Bending Radius: 10×OD
Temperature Range: -40℃ to +60℃ (during operation);
-10℃ +60℃ (during installation)
Dimensions And Weight
CT2328 (Main cable)
| Cable Code | No. of Quads | Nominal Sheath Thickness mm |
Nominal Overall Diameter mm |
Nominal Weight kg/km |
||
|---|---|---|---|---|---|---|
| Inner | Interm. | Outer | ||||
| 0.8mm Conductor, 1.27mm Insulated Wire | ||||||
| RS2328-2Y2Y(K)2YB2Y-14Q0.8 | 14 | 1.2 | 1.1 | 2.2 | 29.2 | 1332 |
| RS2328-2Y2Y(K)2YB2Y-21Q0.8 | 21 | 1.3 | 1.3 | 2.5 | 31.3 | 1655 |
| RS2328-2Y2Y(K)2YB2Y-28Q0.8 | 28 | 1.3 | 1.3 | 2.5 | 35.5 | 2013 |
CT2328 (Main cables with screened quads)
| Cable Code | No. of Quads | Nominal Sheath Thickness mm |
Nominal Overall Diameter mm |
Nominal Weight kg/km |
||
|---|---|---|---|---|---|---|
| Inner | Interm. | Outer | ||||
| 0.8mm Conductor, 1.27mm Insulated Wire | ||||||
| RS2328-2Y(L)2Y(K)2YB2Y-(14+7)Q0.8 | 14+7screen Quads | 1.3 | 1.3 | 2.5 | 32.7 | 1765 |
| RS2328-2Y(L)2Y(K)2YB2Y-(18+3)Q0.8 | 18+3screen Quads | 1.3 | 1.3 | 2.5 | 32.9 | 1783 |
CT2329 (Branch cable)
| Cable Code | No. of Quads | Nominal Sheath Thickness mm |
Nominal Overall Diameter mm |
Nominal Weight kg/km |
|
|---|---|---|---|---|---|
| Inner | Outer | ||||
| 0.8mm Conductor, 1.4mm Insulated Wire | |||||
| RS2329-2Y2YB2Y-4Q0.8 | 4 | 1.0 | 1.7 | 16.4 | 339 |
| RS2329-2Y2YB2Y-8Q0.8 | 8 | 1.2 | 1.8 | 18.8 | 477 |
| RS2329-2Y2YB2Y-14Q0.8 | 14 | 1.2 | 2.2 | 22.3 | 686 |
Note: The parameters listed above are nominal values as per cable standards. Actual values may vary due to material and manufacturing process variations. For precise specifications or customized requirements, please contact us for further information