ZPFU & ZPFU-SH Main & Local Signalling Cables (Ordinary Non-Electrified or DC Electrified Lines)
Application
The cables are designed for the main signalling circuits of 1500V DC electrifi ed lines.
Standard
Cable Construction
| Conductors |
Solid annealed copper, 1.0mm² 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). |
| Mechanical Protection |
Two helically applied steel tapes (0.15, 0.2/0.5mm, depending on pair count). |
| Outer Sheath |
PE/PVC. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1). |
| Remark |
ZPFU: PE/PVC Sheath; ZPFU-SH: LSZH Sheath. |
Electrical Characteristics at 20℃
| Nominal Conductor Diameter |
mm |
1.13 |
| Nominal Cross Section Area |
mm² |
1 |
| Maximum Conductor Resistance (DC) |
Ω/km |
18.1 |
| Minimum Insulation Resistance @500 V DC (3mins) |
MΩ.km |
5000 |
| Maximum Mutual Capacitance (AC) @1000Hz |
nF/km |
55 |
| Maximum Capacitance Unbalance @1000Hz |
pF/500m |
400 |
| Attenuation @45KHz |
dB/km |
2.5 |
| Characteristic Impedance @45KHz |
Ω |
120 |
| Dielectric Strength, conductor to conductor (DC voltage 3mins) |
V |
4500 |
| Operating voltage AC/DC |
V |
450/750 |
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)
Dimensions and Weight
| Cable Code |
No. of Pairs |
Nominal Sheath Thickness |
Nominal Overall Diameter |
Nominal Weight |
Armour Thickness |
| Inner |
Outer |
| |
|
mm |
mm |
mm |
kg/km |
mm |
| 1.13mm Conductor, 2.3 Insulated Wire |
| RS/ZPFU-2Y2YB2Y-1P1S |
1 |
1.0 |
1.5 |
11.7 |
207 |
0.15 |
| RS/ZPFU-2Y2YB2Y-2P1S |
2 |
1.0 |
1.5 |
12.9 |
257 |
0.2 |
| RS/ZPFU-2Y2YB2Y-4P1S |
4 |
1.0 |
1.6 |
16.8 |
509 |
0.2 |
| RS/ZPFU-2Y2YB2Y-7P1S |
7 |
1.0 |
1.7 |
19.0 |
653 |
0.5 |
| RS/ZPFU-2Y2YB2Y-14P1S |
14 |
1.2 |
1.8 |
24.1 |
1011 |
0.5 |
| RS/ZPFU-2Y2YB2Y-21P1S |
21 |
1.2 |
2.0 |
27.8 |
1304 |
0.5 |
| RS/ZPFU-2Y2YB2Y-28P1S |
28 |
1.2 |
2.2 |
31.0 |
1594 |
0.5 |
| RS/ZPFU-2Y2YB2Y-56P1S |
56 |
1.3 |
2.5 |
40.5 |
2630 |
0.5 |
