Cov khoom tseem ceeb ntawm lub nplhaib tseem ceeb yog cov hloov pauv thiab fuses. Lub nplhaib lub ntsiab chav tsev yog ib txheej ntawm high-voltage switchgear, feem ntau yog ntsia rau hauv lub steel phaj hlau txee los yog ua rau hauv ib tug sib sau ua ke lub sij hawm hom nplhaib lub ntsiab fais fab mov chav tsev khoom hluav taws xob. Lub hauv paus tseem ceeb tau txais kev hloov pauv thiab fuses, uas muaj qhov zoo ntawm cov qauv yooj yim, me me, tus nqi qis, txhim kho cov khoom siv hluav taws xob tsis zoo thiab kev ua haujlwm, thiab kev nyab xeeb ntawm lub zog.
Lub nplhaib tseem ceeb yog siv dav hauv cov chaw faib khoom thiab lub thawv hom substations hauv cov chaw thauj khoom xws li thaj chaw hauv nroog, cov tsev siab, cov tsev loj, cov chaw tsim khoom, thiab cov lag luam. Raws li cov qauv ntawm lub thawv roj, lub nplhaib tseem ceeb tuaj yeem muab faib ua hom thawv thiab hom tsev; Raws li tag nrho cov qauv, nws tuaj yeem muab faib ua American thiab European style; Raws li cov khoom siv rwb thaiv tsev, nws tau muab faib ua cov khoom rwb thaiv tsev, cua rwb thaiv tsev hom, thiab SF6 roj rwb thaiv tsev hom; Raws li qhov chaw nyob sab hauv tsev thiab sab nraum zoov, nws tau muab faib ua lub nplhaib sab hauv tsev thiab sab nraum zoov lub nplhaib.
