CONSTRUCTION METHOD FOR REPLACING INSULATOR SET OF 4 CONDUCTOR POWER LINE, AND REPLACING APPARATUS USED FOR SAME CONSTRUCTION METHOD

PROBLEM TO BE SOLVED: To allow replacing of an insulator set while a spacer separating and holding respective power lines of a 4 conductor power line is being attached, and further, to allow replacement work with ease and at a high speed, with the number of components being decreased.SOLUTION: Each conductor 5 is attached with a come-along 10, and the come-along 10 and a fixed yoke 6 are caused to support semi-sheaves 11 and 12 respectively, and then a semi-wire 13 is hooked on these two semi-sheaves 11 and 12 and the other end of the semi-wire 13 is stretched as far as a steel tower, which being provided for each conductor. Each conductor 5 is removed from the fixed yoke 6. The respective conductors 5 are fixed to an upper part and a lower part of a temporary fitting yoke 16 provided to one ends of each of two temporary fitting wires 15 whose the other end is hooked on the cross arm 1 of the steel tower, being stretched between the two lines of conductors 5 and the outside of the conductor. The respective semi-wires 13 are loosened and a front end part of an insulator set A is made to hang downward. The insulator set A is removed from the steel tower and the semi sheave 12, for replacement with a new insulator set A.