Cov theem voltage ntawm kev tswj cables feem ntau tsis tshua muaj hluav taws xob cables, thiab lawv cov ntsuas hluav taws xob feem ntau qis dua 1KV. Qhov no yog vim hais tias cov kab hluav taws xob tswj feem ntau yog siv rau cov teeb liab kis tau tus mob thiab kev tswj hluav taws xob, thiab qhov voltage tsis tas yuav tsum siab dhau. Nyob rau hauv sib piv, lub hwj chim cables, nrog voltage theem feem ntau tshaj 10KV, yog siv rau xa hluav taws xob.
Qhov ntsuas hluav taws xob ntawm cov tswj cable yuav tsum tsis txhob qis dua qhov ua haujlwm voltage ntawm lub voj voog, thiab yuav tsum ua kom tau raws li qhov yuav tsum tau muaj ntawm kev hloov pauv thiab lub zog zaus overvoltage uas yuav tau ntsib. [3] Txhawm rau kom ntseeg tau tias cov kab hluav taws xob tswj tau txo qhov cuam tshuam hauv cheeb tsam thaum muaj kev puas tsuaj los ntawm kev rwb thaiv tsev, kev puas tsuaj, lossis hluav taws kub, lub teb chaws tus qauv GB50217-91 "Code for Design of Cables in Power Engineering" stipulates that for two systems uas yuav tsum tau txhim kho kev ntseeg siab, nrog rau kev tiv thaiv dual tam sim no, qhov hluav taws xob, DC fais fab mov, thiab kev tswj xyuas kev mus ncig, kev tswj hwm kev ywj pheej yuav tsum tau siv.
