Tension control in lightning protection wire
Consumers Energy, Jackson, Michigan, US have had problems controlling the tension forces in the messenger wire. The messenger wire serves as lightning protection and provides protection to the entire aerial spacer cable System. The system allows trees to grow much closer than a bare wire system. This means dramatic reductions in requirements for tree trimming intervals and subsequent cost-savings. The system also eliminates the major pruning of trees that would have been required in cases of bare systems. Of great importance is to be able to have an accurate tension measurement in this messenger wire to match the climatic changes in tension due to our door temperature variations, which will cause traction and contraction in the wire. A mis-tensioned wire could fatigue and damage the spacer cable system.