OPGW (Fibre Optic Overhead Ground Wire) cable is a special kind of electrical ground wire used in power utility for dual function as a ground or static wire and a data communication path. It plays an important role in telecommunications
networks. By combining the function of grounding and data communication into one cable, OPGW deployment considerably reduce the cost of the overhead transmission system.
OPGW cable has two constructures:
1. Central loos tube type
The fibers are positioned loosely in a sealed and water-resistant stainless steel tube water-resistant jelly filling. This tube protects the fibers from damage during installation and operation under different environmental conditions. The stainless optical tube is located at the center of the cable protected by single or multiple layers of aluminium clad steel and aluminium alloy wires. The Aluminium-clad steel wires are shaped trapezoidal around the optical unit to provide compact construction.
2. Multi loose tube type
the fibers are positioned loosely in a sealed and water-resistant stainless steel tube
water-resistant jelly filling. Two or three stainless steel optical tubes are helically stranded in the inner
layer of a multiple-layer cable. This type is developed for very high fiber count requirement over 48 with the maximum fiber count reaching 144. It can meet the requirement of the huge cross and large current capacity.