Raws li kev txheeb cais, ntau tshaj 60 feem pua ntawm PV fais fab nroj tsuag hluav taws yog vim DC arcs. DC arc yog qhov tshwm sim ntawm cov pa tawm, uas tuaj yeem nkag siab tias yog qhov siv hluav taws xob siab tam sim no tsim nyob rau hauv rooj plaub ntawm rwb thaiv tsev. Raws li cov ntaub ntawv qhia: thaum lub hluav taws xob hloov hluav taws xob disconnects tam sim no los yog kev sib cuag tsis zoo, yog hais tias lub Circuit Court voltage tsis tsawg tshaj li 20 volts thiab tam sim no tsis tsawg tshaj li 80 ~ 100mA, ib tug DC arc yuav raug generated ntawm cov neeg sib cuag. khoom siv hluav taws xob. Tsis zoo li AC arc, DC arc tsis muaj qhov xoom hla, uas txhais tau hais tias yog DC arc tshwm sim, qhov cuam tshuam yuav ua kom ruaj khov rau lub sijhawm ntev tsis tawm mus.
Nyob rau hauv lub chaw nres tsheb fais fab photovoltaic, yog tias lub cable txuas tsis nruj, nws yuav ua rau kev sib cuag tsis zoo; kev ntseeg siab ntawm lub connector los yog ncaj qha mus; Lub sij hawm ntev kev laus ntawm cov txheej insulating, thiab kev puas tsuaj ntawm cov txheej insulating vim yog sab nraud quab yuam yuav ua rau DC arcs. Raws li lub sijhawm ua haujlwm ntawm cov nroj tsuag nce, yog li qhov tshwm sim ntawm DC arcing. Qhov kub siab uas tsim los ntawm DC arc tuaj yeem yooj yim tshaj 3000 degree, uas tuaj yeem ua rau hluav taws ncaj qha. Raws li cov xwm txheej hauv tsev thiab txawv teb chaws thiab cov ntaub ntawv, DC arcs tau dhau los ua tus naj npawb ib tus neeg tua hluav taws hluav taws xob.