Flame retardant optical cable for coal mine (MGTSV-steel belt).
Product Description:
1. Optical fiber
2. Fiber paste: water-blocking compound
3. Loose tube: thermoplastic material
4. Center reinforcements: phosphorized steel wire, large core number optical cable, polyethylene needs to be extruded.
5. Water-blocking material: water-blocking filler
6. Armor layer: steel-plastic composite belt
7.Inner sheath: Black polyethylene (possibly available)
8. Outer sheath: blue flame retardant sheath
The structure of the fiber optic cable is that a 250μm optical fiber is sleeved into a loose tube made of high-modulus material, and the loose tube is filled with a waterproof compound. In the center of the core is a metal reinforcing core, and for some core cables, a layer of polyethylene (PE) is squeezed out of the metal reinforcing core. The loose tube (and filler rope) are twisted around the central reinforcing core to form a compact and round core, the gaps in the core are filled with water-blocking filler, and the double-sided plastic-coated steel tape (PSP) is longitudinally wrapped and then extruded into a flame-retardant sheath.
Features and applications
● Good mechanical properties and temperature characteristics;
● Special sheath material has excellent flame retardant performance;
● Pipeline installation, overhead installation, direct burial installation.
Fiber characteristics
| G.652. D | G.655 | 50/125μm | 62.5/125μm |
attenuation | @850nm | - | - | ≤3.0dB/km | ≤3.0dB/km |
@1300nm | - | - | ≤1.0dB/km | ≤1.0dB/km |
@1310nm | ≤0.36dB/km | ≤0.36dB/km | - | - |
@1550nm | ≤0.22dB/km | ≤0.23dB/km | - | - |
bandwidth | @850nm | - | - | ≥500MHz·km | ≥200MHz·km |
@1300nm | - | - | ≥1000MHz·km | ≥600MHz·km |
The fiber optic cable is up to the wavelength |
| ≤1260nm | ≤1260nm | - | - |
Polarization mode dispersion | Single fiber | ≤0.20ps/√km | ≤0.20ps/√km | - | - |
Link value (M=20, Q=0.01%) | ≤0.10ps/√km | ≤0.10ps/√km | - | - |
Technical parameters
project | content | numeric value |
Number of fiber cores | 24 | 48 | 72 | 96 | 144 | 288 |
Loose tubes | Number of loose tubes * number of cores per tube | 4*6 | 4*12 | 6*12 | 8*12 | 12*12 | 24*12 |
| Loose tube outer diameter mm | 1.8 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
Refer to the outer diameter | mm | 10.0 | 11.5 | 12.5 | 14.5 | 17.5 | 18.0 |
Center reinforcements | material | steel wire |
Water-blocking materials | material | Water-blocking cable paste |
Armor layer | material | Wrinkled steel belt |
Outer sheath | Thickness (±0.2mm). | 1.8 |
Operating temperature range | ℃ | -40~+70 |
pulling force | Short-term/long-term (N） | 1500/600 |
Squashed | 1000/300 |
*Can be customized according to customer needsOther structures or number of cores |
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Key mechanical and environmental properties
project | Inspection standards | Prescribed value | request |
Stretch | IEC 60794-1-2-E1 | See technical data | The short-term add-on attenuation ≤ 0.1dB |
Squashed | IEC 60794-1-2-E3 | See technical data | The short-term add-on attenuation ≤ 0.1dB |
impact | IEC 60794-1-2-E4 | Hammer 450g, drop height 1m, at least 5 times | Residual additional attenuation ≤ 0.03dB |
Repeated bending | IEC 60794-1-2-E6 | Load 150N 30 times | Residual additional attenuation ≤ 0.03dB |
torsion | IEC 60794-1-2-E7 | 1m ，±180°, 10 times | Residual additional attenuation ≤ 0.03dB |
Temperature cycling test | IEC 60794-1-2-F1 | -40℃ ~+70℃ | Additional attenuation ≤ 0.05dB |
Combustion performance | IEC 60332-1-2 | Fire resistance | Optical fibers maintain optical contact continuity |
Flame retardant - single vertical burning | The distance between the lower edge of the upper fixture and the burnt focus > 50mm |
Flame retardant - combustion | The height of the carbonized part < <b12>m |
Smoke density | The light transmittance is not less than 50%. |
* All fiber attenuation changes are monitored at 1550nm wavelength. |
Packing and delivery length
standard wooden discs;
Nominal delivery length: 1000m/2000m or according to customer requirements.
Ordering information
RHTX | MGTSV | -□□ 1 2 |
1 Number of fiber cores: | 2~288 |
2 Fiber Type: | A1a(50/125) / A1b(62.5/125)/B4(G655)/B1.3(G652D)
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