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Copper Cables

 

Type of Copper Cables

 

High shielded cable:Applied to communications along the electrified wire of railway, cable can be distinguished to jelly filled type and air filled type.

Wayside cable:Applied to communications along the track of high speed railway and between track and the central office.

 

Air filled type high shielded cable

1.

Cable core
Conductor: Solid annealed copper

Insulation: Polyethylene Quadding: Color polyester tape

2. Covering: Paper tape
3. Shield: Aluminum tape
4. Covering: Paper tape
5. Aluminum sheath: Aluminum tube with anti-corrosion compound
6. Covering: Cotton tape with anti-corrosion compound
7. Armour: Galvanized steel tape with anti-corrosion compound
8. Covering: Cotton tape with anti-corrosion compound
9. Shield: Copper tape.
10. Sheath: Polyethylene

 

Jelly filled type high shielded cable

1.

Cable core
Conductor: Solid annealed copper

Insulation: Polyethylene
Quadding: Color polyester tape
Filled jelly: Petroleum jelly Covering: Mylar tape

2. Inner sheath: Polyethylene
3. Shield: Aluminum tape
4. Covering: Paper tape
5. Aluminum sheath: Aluminum tube with anti-corrosion compound
6. Covering: Cotton tape with anti-corrosion compound
7. Armour: Galvanized steel tape with anti-corrosion compound
8. Armour: Galvanized steel tape with anti-corrosion compound
9. Covering: Cotton tape with anti-corrosion compound
10.

Shield: Copper tape

11.

Sheath: Ployethylene

 

Wayside cable

1.

Cable core
Conductor: Solid annealed copper
Insulation: Polyethylene Wrapping: Fire proofing tape (Suitable for Fire resistance cable)

Ouadding
Covering: Mylar tape

2. Inner shetah: Low smoke free halogen PE
3. Earth wire: Tinned copper wire
4. Armour: Corrugated aluminum tape with anti-corrosion compound
5. Medium sheath: Polyethylene,Low smoke free halogen PE
6. Armour and covering: Galvanized steel tape and cotton tape with anti-corrosion compound
7. Outer sheath: Low smoke free halogen PE

 

 

High shielded cable.
Aluminum sheath and high magnetic permeability metal tape shielded structure with low induced voltage.
Comply with the European DEMKO certification.
Prevent communication line interference from electromagnetic induction.
Air filled type high shielded cable with better air sealing of cable.
Jelly filled type high shielded cable with better water penetration properties.

 

Wayside cable
Comply with REA PE-89 electrical properties and water penetration properties.

Sheath of low smoke free halogen, cable complies with the requirements of IEC 61034, IEC60754 and NES 713.

Flame retardant cable complies IEEE 383 or IEC 60332-3 test requirements.
Prevent electromagnetic interference of high voltage line.
Fire resistance cable complies IEC60331 test requirements.

 

Air filled type high shielded cable

Conductor

diameter

and pairs


Conductor
diameter
(mm)

Cable

core
diameter
(mm)

Aluminum sheath
thickness
(mm)

steel

tape
thickness
(mm)

Outer

sheath
thickness
(mm)

Overall

diameter
approx.
(mm)

0.9×68P
+
1.2×34P
0.9 38.6 2.5 0.5 2.5 54.8
1.2
 
Jelly filled type high shielded cable

Conductor

diameter

and pairs


Conductor
diameter
(mm)

Cable

core
diameter
(mm)

Aluminum sheath
thickness
(mm)

steel

tape
thickness
(mm)

Outer

sheath
thickness
(mm)

Overall

diameter
approx.
(mm)

0.9×28P 0.9 18.0 2.5 0.5 2.5 40.1
0.9×54P 0.9 24.5 2.5 0.5 2.5 46.4
 
ELECTRICAL PROPERTIES
Conductor resistance

Conductor diameter (mm)

0.9

1.2

Max. ave.(Ω/km)

27.4

15.4

Max.(Ω/km)

29.0

16.3

 Conductor resistance unbalance:max. 1%
 High volatge test:500V(R.M.S) for 1 min.,the cable shall be normal.
 Insulation resistance:min. 20,000 MΩ-km
 Mutual capacitance (nF/km)

Norminal

Minimum

Maximum

All cables

90% of cables

90% of cables

All cables

38.5

35.2

36.5

40.5

41.8

 Capacitance unbalance(pF/500M)

Item

Limits for 90% of cable

Limits for remaining 10% of cable

Ave.

Max.

Ave.

Max.

Between pairs in quad

40

160

55

240

Between pairs in adjacent quads

20

110

20

110

Between any pair and earth

160

650

220

950

 Screening factor:According to VDE 0472 1983

Field strength(V/km)

Screening factor

60Hz

800Hz

50

0.15

0.0025

100

0.08

0.0025

300

0.06

0.0025

500

0.08

0.0025

1000

0.10

0.0025

 
Wayside cable

Conductor
diameter

& pairs



Conductor

diameter
(mm)

Cable

diameter

approx.
(mm)

Inner

sheath

thickness

nom.
(mm)

Steel tape

thickness

nom.
(mm)

Outer

sheath

thickness

nom.
(mm)

Overall

diameter
approx.
(mm)

0.9×60P 0.9 26.4 1.9 0.5 2.5 45.5
0.9×70P 0.9 28.0 1.8 0.5 2.5 47.6
 
Electrcial Properties
 Conductor resistance:max. 29.0Ω/km
 Insulation resistance:min.5000MΩ-km
 Dielectric strength:D.C. 500V/1 min. (core-core)
                                 D.C. 10KV/1min. (core-shield)
 Mutual capacitance:max. 60nF/km
 Screening factor:max. 0.6 (Field strength 50V/km at 50,60Hz)