To provide a replacement method it is possible to shorten the insulator string replacement work. A both ends of the bus 3 between the beams 2, 2 is stretched over a pair of insulator string 4,4 V-shaped, one end of the insulator string 4 is connected to the beam 2, the other end is the replacement method of the insulator string 4 which is connected to bracket 8 which is connected to the end of the bus 3. First, stretched a working tension wire 19 between the beam end and the beam of the two insulator string 4,4 V-shaped, is attached to insulator exchange device 18 to the beam-side end portion of one of the insulator string 4, is Tsu in short Ashi 13 of the insulator string hanging frame body 10 is lifted by a crane K, and Tsu to long Ashi 14 Attach the insulator replacement tool 18 to the bus end, both ends of the then insulator string 4 After down on the ground while Tsu in insulator string hanging frame body 10, is Tsu a new insulator string 4 to insulator string hanging frame body 10 is lifted by crane K and, to the bus side end portion of the new insulator string 4 was connected to the bracket 8 by bolts 9, after you have stretched the work for tension wire 19 between the beam end and the beam 2, and connect the beam end to beam 2, and remove the insulator string hanging frame body 10. [Selection Figure] Figure 6
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