CLOSED JACKET BASED ON FIBROUS WINDING AND COMPOSITE LIGHTENING ARRESTOR APPLYING THE SAME

摘要

PURPOSE: To provide a simple jacket suitable for a lightning arrestor that is likely to be exerted with internal excessive pressure under high thermal stresses by forming the closed jacket from a winding part filled with a specific proportion of resin on its surface and a resin part. CONSTITUTION: A fibrous winding 4 of glass fibers is wound around the outer peripheries of pellets 1 each having two end members 3 and coupled together by tubular braces 2 to form a lightning arrestor of a zinc oxide, and when a resin is further added, a closed jacket comprising an outer winding part and a porous resin part 16 is formed. When the proportion of the surface resin part 16 is 15 to 35%, radial mechanical strength is enhanced and an arc and gas produced by an internal short circuit in the pellets 1 are preferentially exhausted from the resin part 16, resulting in the closed jacket suitable for a lightning arrestor that is likely to be exerted with inner excessive pressure under high thermal stresses.