switchgear hais txog qhov voltage ntawm 1 kv thiab siab dua hwj chim system khiav hauv tsev thiab sab nraum zoov ac hloov cov khoom, feem ntau yog siv nyob rau hauv hluav taws xob fais fab system (xws li fais fab nroj tsuag, substation, kis tau tus mob thiab tis kab thiab industrial thiab mining enterprises thiab lwm yam neeg siv) ntawm kev tswj thiab kev tiv thaiv, raws li zoo raws li lub lag luam ntawm daim phiaj hluav taws xob yuav tsum yog ib feem ntawm cov khoom siv hluav taws xob lossis cov kab rau hauv lossis tawm ntawm kev ua haujlwm, tuaj yeem ua rau hauv cov khoom siv hluav taws xob lossis kab tsis ua haujlwm thaum qhov txhaum ntawm daim phiaj hluav taws xob txiav sai sai, txhawm rau ua kom muaj kev ua haujlwm zoo ntawm cov khoom siv hluav taws xob. daim phiaj hluav taws xob tsis muaj qhov txhaum thiab kev nyab xeeb ntawm cov khoom siv, kev ua haujlwm thiab kev saib xyuas cov neeg ua haujlwm.