- Contact Person : Mr. wang jin
- Company Name : CRSC International Company Ltd.
- Tel : 86-010-51846884
- Fax : 86-010-63869194
- Address : beijing,beijing,beijing
- Country/Region : China
FBY-SPTYWPL23 cable
Overview
The size of conductor is 0.785sq mm. It is aluminum shielded cable with skin-foaming-skin physical foaming polyolefin insulation,steel tape armour, and PE outer-sheath. For this digital signal cable, there are two types which are A and B. The type B means the each quad is internal shielded. And for type A, there are some quad internal shielded which is used for coded track circuit and some cores are non- shielded which is used for Auto signal.
The cable can realize transmission of 1MHz (analog signal), 2Mbit/s (digital signal) and rated voltage AC 750V or DC 1100V and below.
Structure
1) Conductor
Conductor wire shall be of annealed soft copper wire with size of 0.785 sq mm, which shall conform to per IEC 60228 regulations.
2) Insulation
Insulation adopts “skin-foaming-skin” three layer co-extruding physical foaming insulation structure which air bubble distributes evenly, thickness and material properties comply with product standard of TB/T 3100 - Railway digital signal cable(China Railway standard ).
Physical mechanical properties conform to following table
| No | Item | Unit | Index | Note |
1 | Insu.tensile strength,medium value | MPa | ≥5.5 | |
2 | Broken elongation,medium value | % | ≥200 | |
3 | 100°C±2°C 1h Insulation thermal shrinkage standard distance 200mm take 3 from same color same dia insulation 100°C±2°C 1h | % | ≤5 | |
4 | After insulation thermal aging, rolling resistant properties hermal aging treatment tem. 100°C±2°C Thermal treatment time 14×24h Aging tem. for second time 70°C±2°C Treatment time 24h | - | No break bown | |
5 | Low tem. Insulation rolling test -55°C±1°C 1h | Failure no/samples no | 0/10 |
3) Pair or quad
- Pair composes of 2 different colour insulated cores stranded together.
- Star quad composes of 4 insulated cores with different colour stranded together. Spiral quads with different stranding space are boned with moisture proof yarn or tape in different color. Stranding space is not less than 300mm.
- Pair and quad are all left direction stranding.
- Shield quad composes of spiral quad and shield layer. Shield layer adopts soft copper tape nominal thickness 0.1mm.
- Shield layer of copper tape is longitudinally wrapped. A fine copper wire as drain wire dia. not less than 0.4mm is laid next to copper tape. Copper tape is neatly wrapped by 1 layer of moisture proof non metal material.
4) Cable Cores
Outer layer of cores are stranded with right direction, which of neighbors is reversed, exempt from 4 cores cable.
Cable cores are wrapped with moisture non-absorption insulation material
5) Al sheath
Heating proof layer: Moisture non absorption material or extruding PE sheath is allowable outside cable cores, Thickness of heating proof layer confirms to insulation requirements.
Outside Al sheath is covered with thermal melt glue or other corrosive resistant material, and extruding the plastic sheath not less than 1.0mm,Other moisture proof material wrapping is also allowable.
Al sheath thickness is not less than 1.1mm.
6) Armor layer
Cable should have galvanized steel,two layer wrapping as overlapping. The thickness is 0.5±0.04mm.
7) Outer sheath
An over-sheath of single extrusion PE with termite-proof material shall be applied around the armour steel tapeas per IEC 60502.
8) Cable electrical properties
No | Item | unit | index | Test method | Conversion formula |
1 1.1 1.2 | DC resistance 20°C DC resistance for each conductor Conductor resistance unbalance of working pairs | Ω/km % | 22.5±1.0 ≤1 | GB/T 3048.4 | L/1000 - |
2 2.1 | Insulation resistance DC 500V 20°C Insulated single core to others contact with shielding and metal sheath | MΩ·km | ≥10000 | GB/T 3048.6 | 1000/L |
3 3.1 3.2 | Insulation dielectric strength 50Hz 2min between cores All cores(or each core)to Shielding and metal sheath | V | 1000 2000
| GB/T 3048.8 | - |
4 4.1 4.2 | capacitance 0.8~1.0kHz Quad working capacitance Pair working capacitance Single insulated core to other earthing cores capacitance | nF/km | 28±2 (28±3) 35±4 ≤70
| GB/T 5441.2 | L/1000 |
5 5.1
5.2
5.3 | Capacitance coupling index 0.8~1.0kHz k1 average Max. k9~k12 average max 4 core cable k1 factor is max | pF/km | ≤81 330 ≤119 230
| GB/T 5441.3 |
L/1000
L/1000
|
6 6.1
6.2 6.3
| Earthing capacitance unbalance ea1,ea2 average value Max. value 4 core cable ea1,ea2 factor is max. value, 10%of cable ea1,ea2≤1294 pF/km is allowable | pF/km | ≤330 800
| GB/T 5441.3 | L/1000 |
7 | Characteristic resistance 20°C 1.7kHz 2.0kHz 2.3kHz 2.6kHz 1000kHz | W | 396±16 (24) 367±15 (22) 343±14 (21) 325±13 (20) 155±16 (16) | GB/T 5441.7 | - |
8 | Pair attenuation 20°C 1.7kHz 2.0kHz 2.3kHz 2.6kHz 1000kHz | dB/km | ≤0.70 ≤0.75 ≤0.80 ≤0.83 ≤9.0 | GB/T 5441.7 | L/1000 |
9 | Phase angle 1.7kHz 2.0kHz 2.3kHz 2.6kHz | (°) | -39±1.2 (3.9) -38±1.1 (3.8) -37±1.1 (3.7) -36±1.1 (3.6) | GB/T 5441.7 | - |
10 | Between shielding units cores earthing near end crosstalk attenuation 2.6kHz 300m and above Between 2 shield quads,When there is 1 conductor earthing in 1 pair of each, between two pair near end cross tall attenuation Near end impedance 55W,Far off end 325W | dB | ≥89 | TB/T3100.5 -2004 | - |
11 | DC resistance between shielding copper tape and drain wire 20°C | W | ≤0.01 | GB/T3048.4 | - |
a Conductor resistance unbalance is the ratio of different and sum between electric resistance of cores. b 20°C characteristic tem. parameter 1.7kHz~2.6kHzis 0.002,1/°C. c 20°C attenuation tem. Parameter is 0.002,1/°C. d The data in () in this table is the factor of A type cable non shield quad. | |||||
9) Ideal shielding factor
Al sheathed cable ideal shield factor is not bigger than 0.2.
FBY-SPTYWPL23 cable
