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Railway Cables
RAILSIG Railway Signalling & Control Cables
K27 Fire Resisting Control Cables (CR1-C1 Class)
Application
K27 Fire Resisting Control Cables are designed for provide circuit integrity for safety lightning, smoke
extraction, ventilation, emergency telephone and exits during fi re for underground railways.
Construction
Conductors: Class 1 solid conductor from 1.5mm² to 4mm²; class 2 stranded conductor for 6mm².
Insulation: Silicone rubber insulation.
Stranding: Cores are helically stranded in concentric layers.
Inner Sheath: LSZH.
Armour: Two layers of steel tape.
Outer Sheath: LSZH.
Reference Standards
RATP K27 specifi cation
Fire resistant: class CR1
No fi re propagation: class C1 RATP (<30cm)
Electrical Characteristics at 20℃
| Number of strands/Nominal Conductor Diameter | mm | 7/1.04 | 1/1.39 | 1/1.79 | 1/2.25 |
|---|---|---|---|---|---|
| Nominal Cross Section Area | mm² | 6 | 1.5 | 2.5 | 4 |
| Nominal Insulation Thickness | mm | 1.0 | 0.8 | 1.0 | 1.0 |
| Operating Voltage | V | 300/500 | |||
Mechanical and Thermal Properties
Minimum Bending Radius: 5×OD (static); 10×OD (dynamic)
Temperature Range: -10℃ to +90℃ (during operation);
-10℃ to +60℃ (during installation)
Dimensions And Weight
| Cable Code | Number of Cores |
Nominal Sheath Thickness mm |
Maximum Overall Diameter mm |
Nominal Weight kg/km |
|
|---|---|---|---|---|---|
| Inner | Outer | ||||
| 7/1.04mm Conductor, 4.76mm Insulated Wire | |||||
| RS/K27-SZ1F3Z1-U(AS+)-2G6 | 2 | 1.0 | 1.5 | 17.0 | 406 |
| 1/1.39mm Conductor, 2.99mm Insulated Wire | |||||
| RS/K27-SZ1F3Z1-U(AS+)-2G1.5 | 2 | 1.0 | 1.5 | 11.3 | 200 |
| RS/K27-SZ1F3Z1-U(AS+)-3G1.5 | 3 | 1.0 | 1.5 | 12.5 | 237 |
| RS/K27-SZ1F3Z1-U(AS+)-12G1.5 | 12 | 1.0 | 1.5 | 18.9 | 596 |
| 1/1.79mm Conductor, 3.79mm Insulated Wire | |||||
| RS/K27-SZ1F3Z1-U(AS+)-2G2.5 | 2 | 1.0 | 1.5 | 13.2 | 265 |
| RS/K27-SZ1F3Z1-U(AS+)-3G2.5 | 3 | 1.0 | 1.5 | 13.5 | 309 |
| 1/2.25mm Conductor, 4.26mm Insulated wire | |||||
| RS/K27-SZ1F3Z1-U(AS+)-2G4 | 2 | 1.0 | 1.5 | 14.7 | 325 |
| RS/K27-SZ1F3Z1-U(AS+)-3G4 | 3 | 1.0 | 1.5 | 15.6 | 411 |
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