Abstract: An aerodynamic damper for reducing wind-induced motion, especially galloping, of electrical transmission and distribution lines comprises a structure that in cross-section has a vane that is secured to the conductor by two arms. Each of the arms is formed on the inside partly by an arc of a circle substantially equal in radius to the radius of the circle enclosing the conductor. This arc extends for about 45 degrees on each of the arms. The remaining part, for approximately 90 degrees, of each of the arms is formed by an arc of a circle of a radius smaller than that of the conductor and centered below and off the centerline of the conductor. Each of the arms is terminated by a lip which is thicker than the adjacent portion of the arm. In a preferred embodiment the damper is formed by extending the cross section linearly along the conductor for a distance of the order of four feet. In an alternate embodiment, the damper is formed by winding the cross-section in a helix about the conductor.

Abstract: A tool for installing on an aerial power transmission line, a vibration damper having a resilient split sleeve and a fin. The vibration damper installation tool comprises a frame element for fitting around the aerial conductor, a conductor guide, a fin receiver for engaging the fin of the vibration damper, and structure on the conductor guide and fin receiver for the application of force to clamp the resilient split sleeve of the vibration damper onto the conductor.