Cables, txawm tias siv rau kev xa hluav taws xob lossis kev sib txuas lus, yog lub neej ntawm cov txheej txheem niaj hnub no. Cov kab hluav taws xob muaj kev cuam tshuam rau qhov ua txhaum uas tuaj yeem cuam tshuam cov kev pabcuam thiab yuav tsum tau kuaj xyuas thiab kho raws sijhawm. Kev nkag siab txog hom kev ua txhaum ntawm cable yog qhov tseem ceeb rau cov kws tshaj lij, cov kws tshaj lij, thiab cov neeg saib xyuas kev koom tes hauv kev tswj hwm cable. Cia peb tshawb nrhiav cov hom kev ua txhaum ntawm cable.
Qhib Circuit Court txhaum: Yog hais tias cov kab hluav taws xob rwb thaiv tsev zoo li qub, tab sis ib hom kev txhaum uas tsis tuaj yeem xa hluav taws xob ib txwm muaj los ntawm cov neeg siv hluav taws xob, nws tuaj yeem suav tias yog qhov qhib hluav taws xob txhaum cai, xws li cov tub ntxhais hlau lossis cov xaim hauv av zoo li tawg thiab tawg, thiab muaj cov xaim loj thiab kev cuam tshuam hauv qee qhov ntawm cov tub ntxhais hlau, thiab lwm yam. Feem ntau, qhov yooj yim qhib Circuit Court faults yog tsis tshua pom, thiab feem ntau ntawm lawv coexist {2} los yog qis dua- ua txhaum.
Tsawg-tsis kam txhaum: Yog hais tias qhov nruab nrab insulating ntawm lub cable puas lawm, ib hom theem - mus rau -theem los yog theem - mus rau - av txhaum uas yuav raug kuaj ncaj qha los ntawm "tsawg- txoj kev voltage mem tes" yog hu ua ib tug to tsawg- ua txhaum txhaum. Feem ntau hu ua low-kuj txhaum. Tus nqi tsis kam yog qis dua ob peb puas ohms. Yog tias tus nqi tiv thaiv yog "zero", nws yog hu ua luv luv- qhov ua txhaum ntawm qhov hluav taws xob, uas yog qhov tshwj xeeb ntawm qhov tsis raug qis - tsis kam.
Cov dej ntws tawm siab -kuj txhaum: Yog hais tias qhov nruab nrab insulating ntawm lub cable puas lawm thiab ib tug taag kuj channel yog tsim, tab sis ib hom kev txhaum uas tsis tuaj yeem ncaj qha ntsuas los ntawm "tsawg-voltage pulse method" ntawm cable fault flash detection instrument hu ua a leaky high-resistance fault. Tus nqi kuj feem ntau yog siab tshaj pua pua ohms. Thaum DC tostand voltage test yog ua nyob rau hauv lub cable nyob rau hauv lub tshav pob, qhov to tam sim no tus nqi nce mus tas li nrog rau qhov nce ntawm cov ntaub ntawv DC voltage, thiab deb tshaj tus qauv tus nqi yuav tsum tau los ntawm lub cable nws tus kheej. Leakage siab-kuj faults yog txheeb ze rau qis-tsis kam tiv taus, thiab tsis muaj qhov sib txawv nruj.
Flashover siab tsis kam txhaum: nyob rau hauv lub pre-test voltage range ntawm cable, thaum lub pre-test voltage ntawm lub cable yog ntxiv rau ib tug tej yam nqi, lub leakage tam sim no tus nqi ntawm lub cable mam li nco dheev nce, thiab nws muaj nuj nqis heev tshaj qhov specification tus nqi yuav tsum tau los ntawm lub xeem cable. Hom kev txhaum no yog hu ua flashover siab -kuj txhaum. Nyob rau ntawm qhov txhaum no, txawm hais tias cov kab hluav taws xob rwb thaiv tsev puas, nws tsis tsim ib qho kev ruaj ntseg channel.