Railway Cables

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

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