ZPAU & ZPAU-SH Main Signalling Cables (AC Electrified Lines)
Application
The cables are designed for connection between traffic control centers and equipment shelters along the trackside. The cables are specially designed to give good induction protection (R.F= 0.26 at inductive voltage 100V/km) and are suitable for installation in intercity railways electrifi ed at 25KV ac.
Standard
- SNCF CT 445 / SNCT ST 698G
- NF F 55-698
Cable Construction
 |
 |
- Conductors: Solid annealed copper, 1.0/1.5 mm nominal cross section area.
- Insulation: Solid polyethylene.
- Cabling Element: Each two conductors are twisted together to form a pair.
- Stranding: Pairs are helically stranded in layers to form the cable core.
- Core Wrapping: Plastic tape(s) with overlapping.
- Inner Sheath: PE sheath. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).
- Electrostatic Shield: One corrugated copper tape.
- Intermediate Sheath: PE/PVC sheath. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).
- Electromagnetic Shield: Two helically applied steel tapes of 0.5mm.
- Outer Sheath: PE/PVC Sheath. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).
- Remarks: ZPAU: PE/PVC Sheath; ZPAU-SH: LSZH Sheath.
Electrical Characteristics at 20℃
| Nominal Conductor Diameter | mm | 1.13 | 1.38 |
| Nominal Cross Section Area | mm | 1.0 | 1.5 |
| Maximum Conductor Resistance (DC) | Ω/km | 18.1 | 12.31 |
| Minimum Insulation Resistance @500 V DC (3mins) | MΩ.km | 5000 | 5000 |
| Maximum Mutual Capacitance @1000Hz (AC) | nF/km | 55 | 55 |
| Maximum Capacitance Unbalance (pair to pair) @800Hz | |||
| 100% cases | pF/500 m | 400 | 400 |
| 90% cases | pF/500 m | 200 | 200 |
| Attenuation @45KHz | dB/km | 2.5 | 2.5 |
| Characteristic Impedance @45KHz | Ω | 120 | 120 |
| Dielectric Strength, conductor to conductor (DC voltage 3secs) | V | 4500 | 4500 |
| Operating Voltage (AC/DC) | V | 450/750 | 450/750 |
| Peak Value (AC) | V | 900 | 900 |
Mechanical and Thermal Properties
- Minimum Bending Radius: 8×OD (static); 16×OD (dynamic)
- Temperature Range: -40℃ to +70℃ (during operation); -20℃ to +50℃ (during installation)
Reduction Factor
| Inductive Voltage (V/km) Em | 28 | 32 | 37 | 42 | 47 | 50 | 70 | 80 | 100 | 120 | 170 | 225 |
| Reduction Factor @50Hz Rk | 0.75 | 0.70 | 0.60 | 0.50 | 0.40 | 0.35 | 0.30 | 0.28 | 0.26 | 0.25 | 0.24 | 0.25 |
Dimensions and Weight
| Cable Code | No. of Pairs | Nominal Sheath Thickness mm |
Nominal Overall Diameter mm |
Nominal Weight kg/km |
||
|---|---|---|---|---|---|---|
| Inner | Interm. | Outer | ||||
| 1.13mm Conductor, 2.3mm Insulated Wire | ||||||
| RS/ZPAU-2Y2Y(K)2YB2Y-1P1S | 1 | 1.0 | 0.8 | 1.6 | 16.2 | 490 |
| RS/ZPAU-2Y2Y(K)2YB2Y-2P1S | 2 | 1.0 | 0.8 | 1.6 | 17.0 | 550 |
| RS/ZPAU-2Y2Y(K)2YB2Y-3P1S | 3 | 1.0 | 0.8 | 1.6 | 22.2 | 820 |
| RS/ZPAU-2Y2Y(K)2YB2Y-4P1S | 4 | 1.0 | 0.8 | 1.6 | 23.8 | 890 |
| RS/ZPAU-2Y2Y(K)2YB2Y-7P1S | 7 | 1.0 | 0.8 | 1.7 | 26.7 | 1080 |
| RS/ZPAU-2Y2Y(K)2YB2Y-14P1S | 14 | 1.2 | 0.8 | 1.8 | 32.3 | 1560 |
| RS/ZPAU-2Y2Y(K)2YB2Y-21P1S | 21 | 1.2 | 1.1 | 2.0 | 37.2 | 1990 |
| RS/ZPAU-2Y2Y(K)2YB2Y-28P1S | 28 | 1.2 | 1.1 | 2.2 | 41.4 | 2380 |
| RS/ZPAU-2Y2Y(K)2YB2Y-56P1S | 56 | 1.3 | 1.3 | 2.5 | 52.9 | 3700 |
| 1.38mm Conductor, 2.55mm Insulated Wire | ||||||
| RS/ZPAU-2Y2Y(K)2YB2Y-14P1.5S | 14 | 1.2 | 0.8 | 1.8 | 35.0 | 2050 |
| RS/ZPAU-2Y2Y(K)2YB2Y-21P1.5S | 21 | 1.2 | 1.1 | 2.0 | 39.5 | 2525 |
