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ZPAU & ZPAU-SH Main Signalling Cables (AC Electrifi ed 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.

Standards:

SNCF CT 445 / SNCT ST 698G

NF F 55-698

Construction:

ZPAU & ZPAU-SH Main Signalling Cables (AC Electrifi ed Lines)

Conductors: Solid annealed copper, 1.0/1.5 mm² 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 mm² 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