RAILWAY Cable
Application
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.
Construction
Air filled type high shielded cable
1
Cable core
Conductor: Solid annealed copper
Insulation: Polyethylene Quadding: Color polyester tape
2Covering: Paper tape
3Shield: Aluminum tape
4Covering: Paper tape
5Aluminum sheath: Aluminum tube with anti-corrosion compound
6Covering: Cotton tape with anti-corrosion compound
7Armour: Galvanized steel tape with anti-corrosion compound
8Covering: Cotton tape with anti-corrosion compound
9Shield: Copper tape.
10Sheath: 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
2Inner sheath: Polyethylene
3Shield: Aluminum tape
4Covering: Paper tape
5Aluminum sheath: Aluminum tube with anti-corrosion compound
6Covering: Cotton tape with anti-corrosion compound
7Armour: Galvanized steel tape with anti-corrosion compound
8Armour: Galvanized steel tape with anti-corrosion compound
9Covering: Cotton tape with anti-corrosion compound
10Shield: Copper tape.
11Sheath: Polyethylene.
Wayside cable
1
Cable core
Conductor: Solid annealed copper
Insulation: Polyethylene
Wrapping: Fire proofing tape (Suitable for Fire resistance cable)
Ouadding
Covering: Mylar tape
2Inner shetah: Low smoke free halogen PE
3Earth wire: Tinned copper wire
4Armour: Corrugated aluminum tape with anti-corrosion compound
5Medium sheath: Polyethylene,Low smoke free halogen PE
6Armour: Galvanized steel tape with anti-corrosion compound
7Outer sheath: Low smoke free halogen PE
Property
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.
Specification
Air filled type high shielded cable
| Conductor diameter and pairs | onductor diameter nom. (mm) | Conductor diameter (mm) | Cable coredia meter (mm) | Aluminum sheath 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 | onductor diameter nom. (mm) | Conductor diameter (mm) | Cable coredia meter (mm) | Aluminum sheath 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. | Maximum | Ave. | Maximum | ||
| 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)/td> | 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 | onductor diameter nom. (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 |
ELECTRICAL PROPERTIES
| Conductor resistance | MAX. 29.0Ω/km |
|---|---|
| Insulation resistance | MIN. 5000MΩ-km |
| Dielectric strength | D.C. 500V/1 min. (core-core) |
| Mutual capacitance | MAX. 60nF/km |
| Screening factor | 0.6 (Field strength 50V/km at 50,60Hz) |