Three Key Technologies Of OPGW Cables

The popular OPGW optical ground wire has achieved a technological breakthrough, but its service life is also a matter of concern to everyone. If you want a long service life of the optical cable, you should pay attention to the following three technical points:

1. the size of the loose tube

The influence of loose tube size on the life of OPGW cable is also reflected in the induced stress. If the size is too small, under the factors of temperature change, mechanical stress, and the interaction between fillers and the optical cable, the stress on the optical cable cannot be well relieved, which will accelerate the decline of the life of the OPGW optical cable, resulting in aging phenomenon. 

2. ointment filling planning

Fiber paste is the oily substance of OPGW optical cable. It is a mixture based on mineral oil or constituent oil, which can block water vapor and buffer the optical cable. The function of fiber paste is evaluated by testing the oxidation induction period of the grease. After the ointment is oxidized, its acid value will increase, which can lead to an increase in hydrogen evolution. After the ointment is oxidized, it will affect the stability of the optical cable structure, resulting in a decrease in stress. In this way, the OPGW optical cable will be affected by vibration, impact, tortuosity, temperature difference changes, and topographic and geological changes. Under stress, the buffering effect of the fiber paste on the optical cable is weakened, thereby reducing the safety of the OPGW optical cable. The direct contact between the fiber paste and the OPGW optical cable is the direct cause of the deterioration of the function of the optical cable. The fiber paste will slowly deteriorate over time, usually first aggregated into small particles, and then gradually evaporated, differentiated and dried up.

3. Optical cable coating material selection and drawing process

The reasons for the increased loss of functional OPGW optical cables mainly include hydrogen loss, optical cable cracking, and optical cable stress. After practical testing, it was found that after years of use of OPGW optical cables, its mechanical characteristics, connection characteristics, optical characteristics and other microscopic functions have not changed. After scanning The electron microscope found that there were no obvious micro-cracks and other abnormal phenomena in the optical cable. However, it is observed that the coating of the OPGW optical cable is not good, and the attenuation of the optical cable with high modulus, tight coating and large peeling force will be more obvious.

In actual use, the optical cable is likely to have some failures due to some external reasons or quality problems, so if you want to use it for a long time, the technical quality must be qualified, and the quality is the last word. 

If you are interested in our OPGW Optical Ground Wire, or need our professional technical support, pls feel free to contact us via Email (sales@gl-fibercable.com) or Whatsapp(+86 18508406369).