The difference between overhead cable and cable BLX

At present, an increasing amount of overhead cable, all companies are required by the market in the production and development of all kinds of overhead cable, in daily sales production, there is still the customer made to order BLX cables, insulated overhead alternative use. According to the market survey, the mainstream wire and cable manufacturers are no longer in production of BLX cable, so the author of these two cables made little difference in my humble opinion:

1. The current domestic production of low voltage overhead cable companies, is the national standard GB / T 12527-2008 "rated voltage 1kV and below aerial insulated cables" as the basis. This standard was revised in 2008 to update the latest version of the national standard.

Overhead insulated cable is mainly used for overhead fixed laying, citing the family line and other places, the insulation material used weathering dedicated overhead insulated cable, overhead insulated cable so simple, safe, reliable, excellent mechanical properties and electrical properties, resistance to environmental corrosion UV, etc. 

Because of its insulation using weathering dedicated overhead insulated cable, cable long-term allowable working temperature up to 70 ℃ or 90 ℃, and excellent electrical insulating properties, the volume resistivity of 1.0 × 1012Ω ? m or more; in laying the Overhead insulated cable laying gap can be reduced, saving line corridor, reducing the voltage drop; in use, can reduce power accidents to ensure personal safety.

2. The current domestic production BLX cables, mainly based on JB / T1601-1993 "rated voltage of 300 / 500V rubber insulated fixed laying cable," the development of this standard is 1993 release, has not been updated for nearly 20 years, the products on the market It has been gradually replaced by a mere figurehead cable.

BLX type Fixed laying rubber insulated wire is suitable for AC rated voltage Uo / U is 300 / 500V and below the electrical equipment and lighting equipment system, which wires Working temperature is 65 ℃. Its structure is aluminum conductor extruded rubber insulation, outside braided wire then greased bituminous materials, greased asphalt material effect is UV resistant. This cable is in use two years ago and is often caused because of the wind and sun-weaved glass fiber shedding, and breakage, resulting in their own short life, and poor anti-aging properties, while polluting the environment.

With cable products constantly updated national standards, according to national requirements for safe and reliable electricity, BLX type wire cloth in performance than overhead cables, overhead cables so the market has gradually begun to replace BLX cable.