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

ZPAU & ZPAU-SH Main Signalling Cables (AC Electrified Lines) Railway Cable
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