| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent generation of tracking in the vicinity of the connecting section of a lead wire at a cylindrical high-voltage cut-out. SOLUTION: A protective cover 21, made of an insulating material, comprises a lead wire fitting part 22 which has an inserting hole 22a brought into close contact with an outer periphery of a lead wire 3, a stress cone fitting part 23 which has a cone-shaped hole 23a brought into close contact with an outer periphery of a stress cone 16, and an umbrella part 24 which covers part of a cut-out body 17 of the cylindrical high-voltage cut-out, and is formed into a rough funnel shape. The protective cover 21 is attached to the vicinity of a lead wire connecting part 15 at the cylindrical high-voltage cut-out (outdoor on-pole distribution apparatus). Adhesion of salt, dust, smoke or the like to the outer periphery of the vicinity of the lead wire connecting part 15, rainwater, concentrated electric field can be prevented. Partial discharge on the surface of the lead wire connecting part can be restrained, prevent insulation degradation and erosion in the vicinity of the lead wire connecting part, thereby preventing generation of tracking and burnout accidents of the insulating material in the vicinity of the lead wire connecting part.</p> |
