Ten Years of Progress with Self-Damping Conductor

Self-damping conductor development is outlined and the depth of the research is illustrated. The rationale of the design is explained in terms of the interference between components, the suppression of amplitude gain by depressed resonance and the reduction of wind input from lowered amplitude. Minor wind excitation remaining causes bumping of components, changing the motion to higher frequency noise which is quickly damped. Experience of many utilities with the remarkable vibration control provided by this product, particularly at high tension with resulting economy, has led to a utilization growth rate which has continued its upward trend continuously throughout the past ten years.