METHOD AND DEVICE FOR REMOVING MATERIAL FROM A POWER LINE WIRE
In the method a travelling wave motion is formed in a power line wire (100), which wave motion loosens material, like snow or ice, on the surface of the wire. A first support point and a second support point are arranged on the wire course, the distance of which support points being substantially smaller than the distance between the adjacent support posts of the power line, and the course of the wire is changed on the part between the support points. Then the wire is suddenly returned into its original course, which evokes a longitudinal and/or transverse wave motion in the wire. The course of the wire can be changed by applying a force on the wire between the first and second support points, in a direction transverse to the longitudinal direction of the wire. Thus the wire is returned into its original course by suddenly removing the force applied into the wire. In implementing of the method can a device hung on a wire be used, which device comprises a frame (10), a first support roll (12), a second support roll (14) and a transfer roll (16) movable in relation to the support rolls.