Fiyuuska meesha laga saaraygoyniyo xidhidhiyaha incomin-g feeder qaybinta transformer ama khadadka qaybinta, waxa ay inta badan ka ilaaliya khadadka transformeror ka wareegga gaaban iyo overload, iyo on / off loading, hadda, Goynta-out fiyuuska gooyay ka kooban yahay insulator insulator ku rakiban tube fiyuus, xiriirada static waa go'an on labada dhinac ee xiriir tube xiriir, Tuubada fiyuuska waxay ka kooban tahay tuubada arsexting ee gudaha. Tubada warqadda isku dhafka ah ee phenolic-ka dibadda ah ama tuubada epoxy, gooynta fiyuuska wareejinta xamuulka waxay bixisaa xiriiryo kaalmeyn ah oo laastiik ah iyo bakhtiyeyn bannaanka si loo damiyo rarista hadda.