Snow accretion on overhead wires

Although snow accretion on overhead wires is a serious problem, recognized physical models have not yet been established. In this paper, attempts directed at understanding the mechanism of snow accretion on wires are reviewed. Fundamentals of the meteorological conditions under which snow accretes on wires, inferred mechanisms, mechanics and heat balance of snow accretion are briefly reviewed. A short historical review of research works throughout the world is given. Wind-tunnel tests aiming at examining the dependence of various parameters on the characteristics of accreted snow on wires are introduced and defects of such tests are discussed. Finally attempts to establish snow-load design on power lines, with some results of observations under natural conditions, are briefly discussed. It should be emphasized that the present paper is characteristic of an interim report and summary about snow accretion on overhead wires, with the purpose of avoiding repetition of the same kind of research efforts and therefore accelerating further progress.