Fiusi mwepu na ibu na-agbanwe fuse bụ ngwaọrụ nchekwa voltaji dị elu ejiri n'èzí. Iji jikọọ na feeder na-abata nke nkesa nkesa ma ọ bụ nkesa nkesa na-emekarị na-echebe transformer ma ọ bụ ahịrị site na mkpirikpi sekit na ibufe, na on / gbanyụọ loading current.Drop-out cut-out fuse is compesed of insulat insulator supports and fuse tube, static kọntaktị na-ofu n'akụkụ abụọ nke insulator support na-akpụ akpụ kọntaktị na-arụnyere na nsọtụ abụọ nke tube-fiozi tube fuser-fiusi fuse. phenoilc compound akwụkwọ tube ma ọ bụ epoxy iko tube.Load ịmafe cutout fuse na-enye mmanye na-agbanwe auxil-iary kọntaktị na arc-emenyụ ogige maka ịmafe on / gbanyụọ loading ugbu a.

Na-emekarị na-arụ ọrụ site fuselink tightened na fuse tube na-obere na-etolite nke nso position.Ọ bụrụ na usoro eme mmejọ, mmejọ ugbu a na-esi na fuse gbazee ozugbo na-ewere ọnọdụ electric arc, nke ka arc-emenyụ tube na-ekpo ọkụ na-agbawa a otutu gas. Nke a ga-emepụta nrụgide dị elu na ịfụ arc tinyere tube. Mgbe fuselink gbazee kọntaktị na-akpụ akpụ enweghị ike ịgbatị ọzọ, a na-akpọchikwa ígwè ọrụ na fuse tube kwụsịrị. Mbelata ugbu a nọ n'ọnọdụ mepere emepe. Mgbe ọ chọrọ ka ịgbanyụọ n'oge nbudata mbelata, onye na-ahụ maka ya ga-eji mkpuchi mkpuchi arụ ọrụ dọpụta kọntaktị na-akpụ akpụ, na kọntaktị mmalite ya na kọntaktị static enyemaka ga-akpọtụrụ. Mgbe ị na-adọta kọntaktị inyeaka na-ekewa n'etiti kọntaktị inyeaka, a na-eme arc eletrik na arc ga-agbatị na oghere oghere na-ekpochapụ arc na ka ọ dị ugbu a na-ekpochapụ gas na-agbapụ na arc n'oge efu efu ugbu a.