OPGW cable (optical fiber composite overhead ground wire), combines fiber in the overhead grounding wire, makes it "fiber communication net along the transmission line", it is an advanced communication in transmission line in recent years.

Advantages:

•   combines functions of grounding wire and communication able, avoid double construction work and   

    maintenance cost;

•   it is installed at the top of transmission line tower or pole, no need to consider best hanging point and electrical 

    corrosion, etc;

•   during remoulding work of old tansmission line, outer diameter and tension weight •can match the need easier

    than only one grounding line;

•   bigger transmission capacity, better communication quality, more reliable;

•   has better mechnical and electrical performances.