In the Internet era, optical cable is an indispensable material for the infrastructure construction of optical communication. As far as optical cable is concerned, there are many categories, such as power optical cable, buried optical cable, mining optical cable, flame-retardant optical cable, underwater optical cable, etc. The performance parameters of various kinds of optical cables are also different. In this article, we will give a simple knowledge answer on how to choose adss optical cables. When choosing the parameters of adss optical cables, we need to choose the correct adss optical cable manufacturers. The following points are the places that need to be paid attention to. :
1: Fiber Type
Regular optical cable manufacturers generally use A-grade fiber cores from major manufacturers. Some low-cost and low-quality optical cables usually use C-grade and D-grade fibers and smuggled fibers of unknown origin. These fibers have complex sources and have a long time to leave the factory. Discoloration, and multi-mode fibers are often mixed with single-mode fibers. Generally, small factories lack the necessary testing equipment and cannot judge the quality of the fibers. Since such optical fibers cannot be distinguished by the naked eye, the common problems encountered in construction are: narrow bandwidth and short transmission distance; uneven thickness, which cannot be connected to the pigtail; the optical fiber lacks flexibility and breaks when the fiber is coiled.
2. Strengthen the steel wire
The steel wire of the outdoor optical cable of the regular manufacturer is phosphating, and the surface is gray. This kind of steel wire does not increase the hydrogen loss after cabling, does not rust, and has high strength. Inferior optical cables are generally replaced by thin iron wires or aluminum wires. The identification method is easy to see that the appearance is white, and it can be bent at will when you hold it in your hand. The optical cable produced with such steel wire has a large hydrogen loss, and the two ends of the optical fiber box will rust and break after a long time.
3. Outer Sheath
Indoor optical cables are generally made of polyvinylidene or flame-retardant polyvinylidene. The appearance should be smooth, bright, flexible and easy to peel. The outer skin of the optical cable with poor quality is not smooth, and it is easy to stick to the inner tight sleeve and aramid fiber.
The PE sheath of the outdoor optical cable should be made of high-quality black polyethylene. After the cable is formed, the outer sheath is flat, bright, uniform in thickness and free of small air bubbles. The outer skin of inferior optical cable is generally produced with recycled materials, which can save a lot of cost. Such optical cable skin is not smooth. Because there are many impurities in the raw material, the outer skin of the optical cable made has many tiny pits, which will crack and enter after a long time. water.
4. Aramid
Also known as Kevlar, it is a high-strength chemical fiber that is currently most used in the military industry. Military helmets and bulletproof vests are produced from this material. At present, only DuPont and Aksu in the Netherlands can produce it, and the price is about 300,000 tons. Indoor optical cables and power overhead optical cables (how does ADS accurately judge the quality of adss optical cables) use aramid yarns as reinforcements. Due to the high cost of aramid fibers, inferior indoor optical cables generally make the outer diameter very thin. Save costs by using fewer strands of aramid. Such optical cables are easily pulled and broken when passing through the tube. Because ADSS optical cable determines the amount of aramid fiber in the optical cable according to the span and wind speed per second, it is generally not afraid to cut corners.
The above are several parameters for judging the quality of optical cables when choosing adss optical cables. I hope that customers and friends can make certain reference.
Post time: Jul-25-2022