Fụpụ wepụbechapụna ibu ịmafe fiusi cutout bụ nke n'èzí eji elu voltaji echebe ngwaọrụ, Tobe connecte na incomin-g feeder nke nkesa transformer ma ọ bụ nkesa edoghi, ọ tumadi chebe transformeror ahịrị si mkpụmkpụ sekit andoverload, na on / gbanyụọ loading, ugbu a, Drop-out fuse cutout bụ nke mejupụtara insulat insulator akwado na fuse tube, static kọntaktị na-obere na njedebe nke tube abụọ na-akpụ akpụ na-akpụ akpụ n'akụkụ abụọ. Ọkpụkpụ tube bụ n'ime arcexting tube mejupụtara. Mpụta phenolic compound tube tube ma ọ bụ epoxy glasstube, Load ịmafe fiusi cutout na-enye enfored enfored elastic enyemaka kọntaktị na arc-emenyụ exclosure maka ịmafe on-apụ loading ugbu a.