Composed of single or multi-optical unit of single Or multi-layer metallic wires.OPGW-Optical Fiber Composite Overhead Ground Wire is a special kind of communication optical cable used for power system with double functions of both ordinary grounding and communication cables.The major forcebearing part of OPGW is made of metallic protection materials of high intensity（aluminum coated steel）while short-circuit cruuent transmission part of OPGW is made of metallic protection materials of low intensity（aluminum alloy or pure aluminum thread）capable of good transmission performance.Our company is able to make optimal designs in accordance with the specific requirements ofour customers.