OPGW is a dual functioning cable performing the duties of a ground wire and also providing a patch for the transmission of voice, video or data signals . The fibers are protected from environmental conditions (lightning, short circuit, loading) to ensure reliability and longevity. The cable is designed to be installed on transmission and distribution lines to carry voice, data and video communications, especially in lighting waveform monitoring system, an observation system for overhead test line, maintenance data information system, power line protection system, power line operation system, and unmanned substation monitoring
OPGW cable has two constructions:
• Central loose tube type
The fibers is placed loosely in a sealed and water resistant stainless steel tube filled with water blocking gel. This tube provides protection to the fiber during installation and operation under severe environmental conditions. Aluminium layer over the tube is optional. The stainless optical tube is located at the center of the cable protected by single or multiple layers of aluminium clad steel and aluminium annoy wires. The aluminium clad steel wires are shaped trapezoidally around the optical unit to provide compact construction. The metallic wires provide mechanical strength to withstand severe installation and operating conditions, while achieving conductivity to control temperature rise during short circuit conditions
This type can accommodate up to 48 fibers in a cable. Despite such a high fiber count in a single tube, each optical fiber is clearly distinguishable utilizing a fiber identification system consisting of coloring and the number of ring marks on it. This compact design features high mechanical strength and fault current rating within a smaller diameter. The smaller diameter also results in excellent sag tension performance
Multi loose tube type
The fibers is placed loosely in a sealed and water resistant stainless steel tube filled with water blocking gel. Two or three stainless steel optical tubes are helically stranded in the inner layer of a multiple-layer cable
The multi loose tube type is designed mostly for very high fiber count requirement over 48 with the maximum fiber count reaching 144. The multi loose tube type can meet the requirement of huge cross and large current capacity
Cable section
(mm2) | Nominal Outer
Diameter
(mm/in) | Nominal Weight
(kg/km)/(lb/kft) | Max working
tension
(kN) | Modulus of
elasticity
(kN/mm2) | Heat expansion
coefficient
(10-6/ºC) | DC Resistance
(Ω/km) | Short-circuit
current capacity
(kA2s) |
| 35 | 8.1/0.318 | 250/167.79 | 45.2 | 162.0 | 13.0 | 2.433 | 8.9 |
| 50 | 9.6/0.378 | 343/230.20 | 63.0 | 162.0 | 13.0 | 1.743 | 16.5 |
| 70 | 11.4/0.448 | 487/326.85 | 89.3 | 162.0 | 13.0 | 1.237 | 3.04 |
| 90 | 12.5/0.492 | 368/246.98 | 58.2 | 94.1 | 17.3 | 0.473 | 72.7 |
| 105 | 13.5/0.531 | 428/287.25 | 67.9 | 94.1 | 17.3 | 0.403 | 98.8 |
| 130 | 15.0/0.590 | 527/353.69 | 83.8 | 94.1 | 17.3 | 0.329 | 149.9 |
Mechanical Properties
| Minimum Bending Radius | Maximum Compressive Load | 4000N for unarmoured cables | | Under installation | 20×OD | 6000N for armoured cables | | During operation | 10×OD for unarmoured cables | Repeated Impact | 4.4 N.m (J) | | 20×OD for armoured cables | Twist (Torsion) | 180×10 times, 125×OD | | Temperature Range | Cyclic Flexing | 25 cycles for armoured cables | | Operating Temperature Range | -40°C(-40°F) to +70°C(+158°F) | 100 cycles for unarmoured cables | | Storage Temperature Range | -50°C(-58°F) to +70°C(+158°F) | Crush Resistance | 220N/cm(125lb/in) |
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Packing shipping
Why Choose Us ?
1. We have a large production base, and advanced production equipment
2. Have an competitive price and high quality
3. Excellent after-sale service
4. Free issue:packaging list,invoice
5. Powerful technology team
6. Strict quality assurance system and perfect testing means
7. Advanced process equipment
8. Delivery on time
9. Our cable sales to Middle East,Africa,Russia,Southeast Asia, etc.
10.We have a good reputation in the overseas
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock,
it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: 30% T/T in advance,70% T/T balance before shipment
If you have another question, pls feel free to contact us below
