Tshooj lus:
Cable sim cov khoom siv tus txha caj qaum ntawm kev tiv thaiv thiab kev tiv thaiv kev sib kis hluav taws xob thiab faib cov network. Txhim kho cov cables muaj kev noj qab haus huv thiab haum rau lub hom phiaj yog qhov tseem ceeb rau kev tiv thaiv cov roj ntsha uas muaj kev nyab xeeb, thiab nthuav txog lub neej. Nkag siab qhov sib txawvCov Khoom Siv Cable NtsuasMuaj nyob hauv paus rau kev xaiv cov cuab yeej zoo rau txoj haujlwm, txawm tias nws yog kev saib xyuas tshiab, kev tu ib txwm muaj, lossis pinpoining qhov txhaum.
Ntau pawg ntawm kev sim cable cov khoom siv:
High voltage (HV) thiab nruab nrab voltage (MV) xeem cov teeb tsa:Cov no yog powerhouse units tsim rau kev sim offline. Lawv thov kom tiv thaiv kom dav dav dav dav rau cov qoob loo kom deb dhau ntawm lawv cov kev ua haujlwm ib txwm muaj. Lawv thawj lub hom phiaj suav nrogDielectric withststand (hi - lauj kaub) kev simKom paub meej tias cov rwb thaiv tsev tseem ceeb hauv kev ntxhov siab, thiabTan Delta (Poob kaum sab xis) ntsuasTxhawm rau ntsuas qhov kev noj qab haus huv tag nrho thiab kev laus ntawm cable rwb thaiv tsev los ntawm ntsuas hluav taws xob ua kom ntsuas.
Tsawg heev zaus (VLF) Cov Tshuab Kuaj:Cov cuab yeej tshwj xeeb ntawm HV / MV kuaj, VLF cov cuab yeej siv AC kev ua ntu hluavtaws ntawm zaus ntau dua qis dua Mains Power (feem ntau 0.1 Hz). Qhov no drastically txo qhov xav tau lub zog hluav taws xob uas yuav tsum tau ua rau ib txwm muaj, ua rau lawv muaj peev xwm portable thiab haum rau kev sim ntsuas ntawm ntev kev sib tw. VLF yog siv tau tshwj xeeb rau cov ntoo kom pom thiab kev txiav txim siab nyob rau hauv extruded polymer-} insulated cables.
Lub sijhawm sau txog kev xav txog (TDR):Cov cuab yeej kuaj mob tseem ceeb rau pinpointing ua txhaum. TDRs Xa cov mem tes hluav taws xob luv luv hauv cable. Los ntawm kev txheeb xyuas cov teeb liab uas cuam tshuam rau lub sijhawm thiab cov qauv duab, cov kws tshaj lij tuaj yeem nrhiav tauQhib kev ncig, luv luv, thiab qhov tseem ceebimpedance mismatches(Zoo li cov zaub mov ua haujlwm lossis tsis zoo) raws qhov ntev ntev, txawm mais deb.
Rwb thaiv tsev tiv thaiv cov tub rog (MOPGERS):Cov cuab yeej siv tau siv ntawm ob qho tib si ntsia cov xaim thiab cov reels tshiab. Lawv siv lub dc voltage (feem ntau 500v, 1000v, 2500V, lossis ntsuas lub txiaj ntsig tam sim no ntws los ntawm cable lub rwb thaiv tsev. Tus nqi ntsuas yog qhia raws liRwb thaiv tsev tsis kam (IR), feem ntau nyob rau hauv megaohms (mω) lossis gigaohms (gω). Qhov kev ntsuas no yog qhov tseem ceeb rau kev kuaj cov dej paug noo, paug, lossis cov rwb thaiv tsev dav dav.
Kev tso tshuaj ib nrab (PD) Nrhiav Kom Tau Lub Npe:Cov kev ntsuas siab tshaj plaws tshawb nrhiav thiab nrhiav cov hluav taws xob me me hauv cov hluav taws xob hauv ib cheeb tsam tshwm sim hauv kev tawm suab lossis tsis meej. Thaum lub sij hawm kuj me, cov kev cuam tshuam tawm cov cim hluav taws xob tshwj xeeb thiab qee zaum cov pa hluav taws xob acoustic. Pd kev kuaj yog qhov ntsuas ntsuas ntsuas ntawm cov hauv paus tsis ua tiav, tshwj xeeb tshaj yog tseem ceeb rau MV / HV cov khoom muaj nqis. Tshuab ntau los ntawm Portable Handheld units rau kev saib xyuas cov teeb tsa online.
Cable txhaum cov chaw (thumpers / surge generators):Siv tshwj xeeb thaum ua txhaum nyuaj (tuag luv lossis qhib) muaj. Cov koog no siv qhov siab - voltage tau nce mus rau qhov yuam kev cable. Thaum qhov kev ntxeev siab mus txog qhov kev ua txhaum cai, nws ua rau pom thiab pom "thump" lossis txim. Ua ke nrog tus TDR lossis Acoustic Pinpoting cov cuab yeej siv, cov kws tshaj lij tuaj yeem nrhiav qhov chaw ua txhaum meej meej.
Sib sib zog nqus dej: Rwb thaiv tsev tsis kam - lub hauv paus ntawm cable kev noj qab haus huv
Thaum flashy high - voltage cov kev tshuaj ntsuam kom tau mloog, tus neeg txo hwj chimRwb thaiv tsev tsis kam (IR)Kev ntsuas puas yog ib qho tseem ceeb tshaj plaws thiab nquag ua cov kev ntsuam xyuas uas siv cov khoom siv cable. Qhov ntsuas no ncaj qha qhia qhov tsis zoo ntawm cov kev thaiv kev tiv thaiv tam sim no los ntawm tus neeg xyuas pib los ntawm cov rwb thaiv tsev rau hauv av lossis lwm tus neeg saib xyuas.
Nws ua haujlwm li cas:Tus megger siv tau paub lub hom phiaj uas paub txog ntawm tus thawj coj thiab rwb thaiv tsev ntaub thaiv / av. Qhov tshwm sim tam sim nodhauCov khoom siv rwb thaiv tsev yog ntsuas (qhov no yog qhov xau tam sim no). OHM txoj cai (r=v / i) yog ces siv los xam cov rwb thaiv tsev tsis kam.
Vim li cas nws tseem ceeb:Lub siab Id cov cim qhia txog kev noj qab haus huv, qhuav, thiab {}} dawb rwb thaiv tsev nrog kev xau me me. Qhov qis lossis nrawm txo cov txiaj ntsig ntawm cov teeb meem loj:
Tshuaj Nyab Rog:Dej yog ib tus thawj coj. Ntub dej pw thaiv cov neeg txo qis ir.
Kev paug:Av, ntsev, lossis roj ntawm cov chaw lossis hauv rwb thaiv tsev tsim kev txwv.
Thermal degradation:Overheating tuaj yeem tsoo lub rwb thaiv tsev polymers.
Kev puas tsuaj ntawm lub cev:Nicks, txiav, lossis cov seem sib xyaw ua kom muaj kev cuam tshuam cov kev thaiv kev.
Dhau ntawm qhov ntsuas nkaus xwb:Cov kws tshaj lij tsis txhob cia siab rau tsuas yog ib qho snapshot. Polarization Performance index (pi)Yog qhov tseem ceeb tsom kwm muab tau los ntawm IR sim. Nws cuam tshuam nrog kev noj IR kev ntsuas ntawm qee kis (piv txwv li 1 feeb thiab 10 feeb). PI yog tus piv ntawm 10-feeb ir tus nqi rau 1-feeb ir tus nqi. Ib tus pi tsawg (<1) suggests significant contamination or moisture, where leakage current stabilizes quickly. A high PI (>2) feem ntau qhia tau zoo, "dielectric nqus" rwb thaiv tsev. Kev Tshawb Fawb Txog Qhov Kev Tshawb Xyuas ntawm IR PRESUESTOM TOM QAB yog txawm muaj zog ntau dua rau kev twv ua ntej tsis ua haujlwm ua ntej nws tshwm sim.
Xaiv txoj cai rwb thaiv tsev tiv thaiv cov khoom lag luam:
Cov kev txiav txim siab tseem ceeb mus dhau qhov kev xeem voltage siab tshaj plaws (piv txwv li, 5kV, 10KV, 15KV):
Kev ntsuas kev ntsuas hluav taws xob ruaj khov:Cov siv voltage yuav tsum nyob twj ywm tsis paub meej txog kev hloov pauv hauv kev xau dej tam sim no rau qhov tseeb IR kev ntsuas. Saib rau cov khoom siv nrog cov kev tswj hluav taws xob ruaj khov.
Kev ntsuas ntau thiab raug:Nco ntsoov ntsuas tau nyeem cov kev xav tau siab - tsis kam muaj nuj nqis (feem ntau gω ntau yam rau cov kab zoo) nrog txaus precision. Kev tiv thaiv cov chaw yog qhov tseem ceeb rau kev tshem tawm cov npoo xau ntawm qhov ntsuas tseem ceeb.
Cov ntaub ntawv nkag & PI suav:Niaj hnub nimno siv cov ntsuas ntsuas ncua sijhawm thiab laij cov neeg ncaj qha PI, tshem tib neeg yuam kev thiab txuag lub sijhawm tseem ceeb.
Tiag - ntiaj teb cuam tshuam:
Xav txog ib qho xwm txheej: Qhov chaw muaj kev lag luam uas tau ntsib cov hluav taws xob tsis sib xws. Cov rwb thaiv tsev ib txwm ua rau kev noj txiaj ntsim tshwj xeeb qhia tau tias tsis muaj kev cuam tshuam txog kev ua haujlwm tsis txaus ntseeg Cov ntaub ntawv no qhia kom them tus VLF tiv thaiv VLF tiv thaiv, uas tau lees tias muaj kev cuam tshuam hauv zos. Cov kev hloov pauv ntawm qhov kev sib xyaw ntawm txoj kab sib ceg txwv tsis pub muaj kev puas tsuaj thaum lub sij hawm Peak ntau lawm, zam kev ua haujlwm ntev thiab muaj peev xwm kev nyab xeeb. Cov inderscores li cas i foundational ir sim ua ke nrog cov khoom siv cable kev sim ua kom haum thawj kab ntawm kev tiv thaiv hauv kev twv xyuas.
Nkag siab lubCov Khoom Siv Cable NtsuasThiab qhov tseem ceeb uas lawv ntsuas, zoo li rwb thaiv tsev rwb thaiv tsev tsis kam thiab nws cov kev tshaj lij hluav taws xob kom tau txais kev txiav txim siab. Qhov no txhais lus ncaj qha rau kev txhim kho cov phiaj xwm kev ntseeg tau, txhim kho kev nyab xeeb cov qauv, thiab cov hom phiaj zoo ntawm lub zog kev lag luam thoob ntiaj teb.
