Njengenxalenye ephambili yeenkqubo zokukhusela umbane, ukukhethwa kwentonga yombane efanelekileyo kuchaphazela ngqo ukhuseleko lwesakhiwo. Isigqibo kufuneka silinganise iinkcukacha zobugcisa, imiba yokusingqongileyo, kunye nokuthotyelwa kwemithetho.
1. Uhlobo loKhetho ngokweMisebenzi
IiFranklin Rods: Zifanelekile kwizakhiwo zokuhlala ezine-radius yokhuseleko engama-30m. Zifuna ukwakhiwa kwentsimbi egalelweyo kunye neegridi ezisekelwe phantsi komhlaba.
Iinduku ze-ESE (Early Streamer Emission): Yandisa umgama ukuya kuthi ga kwi-100m usebenzisa i-electronic triggering, efanelekileyo kwizibonelelo ezibalulekileyo ezifana namaziko edatha. Qinisekisa iziqinisekiso ze-CE/UL.
Iintonga zeRadioactive (ezithintelweyo): Azivumelekanga kwizakhiwo ezintsha zaseTshayina ngokwe-GB 50057 ukususela ngo-2005 ngenxa yeengozi zeradiation.
02. Ubunjineli obuKhethekileyo kwiNdalo
Ukubala Ubude: Sebenzisa indlela ye-rolling sphere $ h = \sqrt{2rH – H^2}$ (h: ukuphakama kwentonga, r: i-sphere radius, H: ukuphakama kwesakhiwo)
Ukumelana Nokugqwala: Sebenzisa intsimbi engagqwaliyo eyi-316L (ukumelana nokutshizwa ngetyuwa ngaphezulu kweeyure ezingama-720) kwiindawo eziselunxwemeni; i-copper-titanium alloy (pH 2-12 tolerance) kwiindawo zeekhemikhali
Ubuninzi bombane: Kwiindawo ezisebenza kakhulu (ngaphezulu kwama-90 eentsuku zeemvula ngonyaka), yonyusa ii-electrode ezisezantsi nge-25%.
03. Ufakelo oluhambelana neKhowudi
Isigaba soYilo: Gcina ukumelana komhlaba <10Ω (<4Ω kwizixhobo ezikhethekileyo), sebenzisa iinkqubo zomhlaba ze-TN-S/TT
Ulwakhiwo: Faka i-thermite welding kwii-air terminals/down conductors ezine->12cm ezidibeneyo
Uhlolo: Vavanya i-impedance ye-impulse ngokusebenzisa ii-CDM-10 pulse current metres; qinisekisa ukubopha ngemifanekiso ye-infrared
Icebiso Lokulungisa: Jonga ukumelana komhlaba ngee-micro-ohmmeters kabini ngonyaka, tshintsha ii-conductor coating rhoqo emva kweminyaka emi-5 ukuqinisekisa ukuthotyelwa kwe-IEC 62305 kulo lonke ixesha lokhuseleko.