K27 Fire Resisting Control Cables (CR1-C1 Class)
Application
The cables are designed for provide circuit integrity for safety lightning, smoke extraction, ventilation, emergency telephone and exits during fi re for underground railways.
Standard
- RATP K27 specifi cation
- Fire resistant: class CR1
- No fi re propagation: class C1 RATP (<30cm)
Cable Construction
| Conductors |
Class 1 solid conductor from 1.5mm^2 to 4mm^2; class 2 stranded conductor for 6mm^2. |
| Insulation |
Silicone rubber insulation. |
| Stranding |
Cores are helically stranded in concentric layers. |
| Inner Sheath |
LSZH. |
| Armour |
Two layers of steel tape. |
| Outer Sheath |
LSZH. |
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 |
mm^2 |
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 |
Maximum Overall Diameter |
Nominal Weight |
| Inner |
Outer |
| |
|
mm |
mm |
mm |
kg/km |
| 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 |
