ZPAU & ZPAU-SH Main Signalling Cables (AC Electrified Lines)
Application
The cables are designed for connection between traffi c 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^2 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^2 |
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 |
Nominal Overall Diameter |
Nominal Weight |
| Inner |
Interm. |
Outer |
| |
|
mm |
mm |
mm |
mm |
kg/km |
| 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 |
