1kV low-voltage overhead cables tsis tas yuav muaj cov txheej txheem sab hauv semiconductive vim tias muaj hluav taws xob tsawg heev ntawm cov khoom siv hluav taws xob. Txawm li cas los xij, thaum lub xov tooj hluav taws xob nyob ze rau hauv av electrode, lub zog hluav taws xob ntawm qhov hluav taws xob ntawm qhov hluav taws xob ntawm 10kV nyiaj siv ua haujlwm yog 2-3kV / hli, thaum lub 35kV nyiaj siv ua haujlwm cable tuaj yeem ncav cuag siab li 5kV / hli, yuav tsum tau siv cov txheej txheem sab hauv semiconductive shielding.
Vim hais tias cov neeg xyuas pib thiab cov txheej txheem rwb thaiv tsev nyob rau hauv ib lub cable tsis ruaj khov, lawv tuaj yeem cais raws li qhov kub thiab txias. Nyob rau hauv cov huab cua los nag, cov khoom sib cais tau ntim nrog noo noo, txo lawv lub zog dielectric. Cov cua qhuav muaj lub zog dielectric txog li 3kV / hli, thaum huab cua ntub tsuas muaj 0.5-1kV / hli. Yog li, nyob rau hauv ib txwm ua haujlwm, cov ntaub ntawv corona tawm ntawm tus neeg xyuas pib nto thiab cov rwb thaiv tsev, ua rau corona paug poob thiab yooj yim ua rau cov rwb thaiv tsev nruab nrab. Yog li ntawd, nyob rau hauv cov teb chaws thoob ntiaj teb, overhead cables ntawm 10kV thiab saum toj no ntiav ib tug puab semiconductive shielding txheej ntawm tus neeg xyuas pib.
Ib leeg-cov tub ntxhais siv hluav taws xob tsis tas yuav tsum muaj txheej txheej sab nraud semiconductive shielding, tab sis peb -core laminated overhead cables ntawm 10kV thiab siab dua yuav tsum siv cov txheej txheem sab nraud semiconductive shielding. Qhov no yog vim qhov hluav taws xob sab nraud ntawm peb - tub ntxhais laminated overhead cable tsis sib xws, thiab tsis muaj txheej txheej sab nrauv semiconductive shielding, muaj zog corona tawm yuav tshwm sim thaum huab cua ntub.
