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Railway Cables |  |
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TYPE A1, A2 & A3 Railway Signalling Cable
Application
The cables are designed for railway signalling systems. The cables are suitable for use in d.c. circuits where the
nominal voltage to earth does not exceed 1100 volts and are suitable for installation in ducts.
Standards
NR/PS/SIG/00005(formerly RT/E/PS/00005)
Construction
Conductors: Tinned stranded copper, class 2 according to IEC 60228 & BS 6360.
Insulation: LSZH crosslinked.
Core Wrapping: Plastic tape(s) with overlapping.
Sheath: LSZH (for types A2 & A3 only).
Electrical Characteristics at 20℃
| Nominal Conductor Cross Section | mm² | 0.75 | 1.15 |
| Maximum Conductor DC Resistance | Ω/km | 24.8 | 17.3 |
| Voltage Rating | KV | 0.65/1.1 | |
| Nominal Insulation Thickness | mm | 0.85 | 0.85 |
Mechanical and Thermal Properties
Minimum Bending Radius: 6×OD (static); 15×OD (dynamic)
Temperature Range: -25℃ to +85℃ (during operation);
-10℃ to +85℃ (during installation)
Dimensions And Weight
| Cable Code | No. of cores& Nominal Conductor Cross Sectional Area No.×mm² |
No. & Nominal Diameter of Strands No/mm |
Nominal Sheath Thickness mm |
Overall Diameter Min/Max mm |
Nominal Weight kg/km |
| Type A1(without sheath) | |||||
| RS/A1-H-1G0.75(BL) | 1x0.75(blue) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G0.75(BR) | 1x0.75(brown) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G0.75(RD) | 1x0.75(red) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G0.75(OR) | 1x0.75(orange) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G0.75(GR) | 1x0.75(green) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G0.75(VI) | 1x0.75(violet) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G0.75 | 1x0.75(black) | 7/0.37 | - | 2.7/3.2 | 16 |
| RS/A1-H-1G1.15 | 1x1.15(black) | 16/0.30 | - | 2.9/3.6 | 21 |
| Type A2(with sheath) | |||||
| RS/A2-3GH-1G0.75 | 1x0.75 | 7/0.37 | 0.7 | 4.0/5.0 | 30 |
| RS/A2-3GH-1G1.15 | 1x1.15 | 16/0.30 | 0.7 | 4.3/5.3 | 35 |
| Type A3(with sheath) | |||||
| RS/A3-3GH-2G0.75 | 2x0.75 | 7/0.37 | 0.9 | 6.7/8.8 | 67 |
| RS/A3-3GH-4G0.75 | 4x0.75 | 7/0.37 | 1.0 | 8.0/10.4 | 108 |
| RS/A3-3GH-6G0.75 | 6x0.75 | 7/0.37 | 1.1 | 9.7/12.5 | 160 |
| RS/A3-3GH-10G0.75 | 10x0.75 | 7/0.37 | 1.2 | 12.6/16.1 | 259 |
| RS/A3-3GH-14G0.75 | 14x0.75 | 7/0.37 | 1.3 | 13.8/17.7 | 495 |
| RS/A3-3GH-36G0.75 | 36x0.75 | 7/0.37 | 1.6 | 21.6/26.9 | 752 |
| RS/A3-3GH-48G0.75 | 48x0.75 | 7/0.37 | 1.6 | 24.3/30.7 | 963 |