Nisahani - ihuza imiterere ihuza uburebure bushobora guhinduka bukoreshwa muri sisitemu yingufu. Ukurikije GB / T 5075 - 2016 "Terminology for Fiting Fiting", bisobanurwa nk'isahani - igikoresho gishobora guhinduka kandi kiri mu cyiciro cy'ibice bigize umurongo uhuza ibice. Iki gikoresho kigera ku burebure bwo guhuza ibice binyuze mu gishushanyo mbonera kandi gikoreshwa cyane cyane mubijyanye no guhererekanya imirongo [1] [3]. Ikibaho cyo guhindura kirimo ubwoko bubiri busanzwe: Ubwoko bwa DB nubwoko bwa PT. Ubwoko bwa DB bugera kuri L1 - L5 guhuza uburebure bwurwego rwa gatanu muguhitamo guhuza umwobo wa "0" na "1 - 5", bikwiranye nigihe-cyo-gihe-cyo-gihe-cyo-gihe-cyo-gihe-cyo guhinduranya uburebure bwumugozi wa insulator [2-3]; Ubwoko bwa PT bugera kumurongo muremure ugereranije muguhindura umwanya wumwobo wo hagati. Ibipimo bisanzwe birimo moderi nka DB-7 na DB-10. Ibi byuma byashyizwe muri sisitemu yigihugu isanzwe yerekana inganda zingufu kandi ikoreshwa nkijambo risanzwe kubikoresho bihuza. Igicuruzwa cyakozwe hifashishijwe ikoranabuhanga rishyushye kandi rikwiranye no guhuza insinga za voltage 10kV. Ifite tekiniki ya tekinike nko guhinduranya ibintu byoroshye no kwishyiriraho byoroshye