Kev ntsuas hluav taws xob xav tau qhov tseeb siab vim tias cov ntaub ntawv feem ntau siv rau kev them nqi, kev faib nqi, thiab kev ntsuas kev ua haujlwm. Ib qho yuam kev me me hauv kev ntsuas tam sim no tuaj yeem ua rau muaj qhov sib txawv ntawm nyiaj txiag ntau lub sijhawm. Yog li, CTs siv rau kev ntsuas lub zog yuav tsum raug xaiv nrog kev saib xyuas tshwj xeeb rau cov chav kawm raug, theem kev ua yuam kev, lub nra, qhov sib piv, thiab ntev - lub sijhawm ruaj khov.
Qhov tseem ceeb tshaj plaws yog chav kawm raug. Chav kawm 0.5S thiab 0.2S yog ib txwm siv rau kev ntsuas lub zog. Qhov "S" qhia txog qhov tseeb ntawm qhov qis qis. Qhov no yog qhov tseem ceeb vim tias lub zog ntsuas hluav taws xob yuav tsum ntsuas lub teeb lub teeb kom raug, xws li thaum hmo ntuj lossis thaum lub sijhawm ua haujlwm qis -. Chav kawm 0.2S yog qhov tseeb dua 0.5S thiab feem ntau yog siv rau kev them nqi hluav taws xob lossis kev ua lag luam muaj txiaj ntsig siab. Chav kawm 0.5 tuaj yeem siv tau rau kev saib xyuas lub zog sab hauv qhov twg tsis xav tau qhov tseeb.
Phase yuam kev kuj tseem ceeb heev. Kev ntsuas hluav taws xob nyob ntawm theem kev sib raug zoo ntawm voltage thiab tam sim no. Yog tias CT qhia txog theem kev hloov pauv, qhov kev suav ntawm lub zog yuav tsis raug, ua rau lub zog yuam kev. Metering CTs yog tsim los kom muaj qhov yuam kev qis, tab sis qhov yuam kev tuaj yeem nce yog tias lub nra hnyav dhau lossis qhov tam sim no tsawg dhau. CT yuav tsum tau ua nyob rau hauv nws qhov kev teev tseg.
Qhov piv yuav tsum nyob ze rau qhov tseeb load. Yog hais tias CT yog loj, qhov thib ob tam sim no ntawm ib txwm load yuav me me, txo qhov raug. Yog hais tias CT yog undersized, nws yuav saturate thaum overloads. Qhov kev thauj khoom ib txwm yuav tsum feem ntau poob ntawm 60% thiab 80% ntawm CT thawj qhov ntsuas. Kev loj hlob yav tom ntej yuav tsum tau txiav txim siab, tab sis tsis yog ntawm qhov raug nqi tam sim no.
Burden yuav tsum tau muab xam kom zoo. Lub nra hnyav ntawm CT yuav tsum sib npaug los yog ntau dua li tag nrho lub nra ntawm lub 'meter', txuas, terminals, thiab lwm yam khoom siv. Ntev cable khiav nce lub nra, yog li yuav xav tau cov conductors loj dua. Yog tias lub nra hnyav dhau, CT yuav saturate thiab tsim cov ntawv nyeem tsis raug. Lub meter input impedance yog ib feem ntawm lub nra thiab yuav tsum suav nrog.
Tamper tsis kam thiab sealing yog ib qho tseem ceeb rau daim ntawv sau nqi. CT thiab nws txoj hlua yuav tsum raug tiv thaiv los ntawm kev nkag tsis tau. Cov ntawv pov thawj calibration thiab cov ntawv xeem yuav xav tau. Qee qhov kev siv hluav taws xob xav tau cov qauv CT tshwj xeeb, txoj kev sib khi, lossis cov npe pom zoo. CT yuav tsum ua raws li cov qauv thiab cov cai hauv zos.
Kev teeb tsa yuav tsum muaj tseeb. Polarity, theem kev txheeb xyuas, thiab hauv av yuav tsum tau txheeb xyuas. CT piv yuav tsum tau programmed rau hauv lub ntsuas. Tom qab kev teeb tsa, lub kaw lus yuav tsum tau sim thiab muab piv nrog lub ntsuas ntsuas yog tias ua tau. Kev saib xyuas tsis tu ncua thiab ncua sij hawm calibration yuav tsum tau.
Hauv kev xaus, xaiv lub zog ntsuas CT los ntawm kev saib xyuas qhov tseeb hauv chav kawm, theem kev ua yuam kev, piv txwv, lub nra, tamper tsis kam, thiab ua raws. Lub siab - zoo ntsuas CT yuav muab cov ntaub ntawv muaj tseeb, txhim khu kev qha, thiab raug cai siv zog. Tus nqi ntawm CT zoo dua yog feem ntau me me piv nrog rau kev cuam tshuam nyiaj txiag ntawm kev sau nqi tsis raug.