Power cable on-line monitoring device

The utility model provides a power cable on-line monitoring device, which relates to the technical field of cable monitoring and comprises two arc-shaped plates, a cable monitor body is fixed between the tops of the two arc-shaped plates, arc-shaped openings are formed in the middle parts of the inner walls of the two arc-shaped plates, and the arc-shaped openings are communicated with the arc-shaped plates. The bottom of the cable monitor is provided with two arc-shaped openings, a plurality of balls are arranged in the two arc-shaped openings in a rolling mode, the bottoms of the balls extend to the inner walls of the arc-shaped plates, side plates are fixed to one sides of the two arc-shaped plates, and scrapers are fixed between the inner walls of the two side plates. The cable monitor can move along the outer surface of the cable conveniently by adjusting the two arc-shaped plates through the locking bolts and arranging a plurality of balls in the arc-shaped openings in the two arc-shaped plates, and the