Nyob rau hauv cov ntaub ntawv chaw fais fab kev faib tawm, ungrounded thiab siab -tsis kam grounded systems yog ib txwm muaj, tshwj xeeb tshaj yog nyob rau hauv 10 kV nkag feeders, standby generator paralleling tsheb npav, thiab lub thib ob sab ntawm kev rho tawm transformers pub cov khoom tseem ceeb. Cov tshuab no qhia ib qho tseem ceeb: ib kab - mus rau - hauv av txhaum tsis tsim tam sim no txaus los tiv thaiv overcurrent. Cov khoom siv txuas ntxiv mus, tab sis qhov chaw tsis muaj zog tau tsim nyob rau hauv rwb thaiv tsev. Lub zog zoo li qub thaum qhov teeb meem ntsiag to.
Ib txwm ua txhaum qhov chaw cia siab rau kev hloov cov khoom noj ib zaug ib zaug lossis ntsuas qhov ntsuas hluav taws xob los ntawm ntu. Cov chaw khaws ntaub ntawv tsis tuaj yeem ua haujlwm li ntawd. Txhua qhov kev tawm dag zog pub dawb yuav ua rau poob qis hauv txee, yog li pab pawg ua haujlwm zam kev sim - thiab - yuam kev mus kom ze. Kev ua txhaum hauv av tuaj yeem nyob ntev ntev lossis ntau hnub. Yog tias theem thib ob ua txhaum thaum lub qhov rais ntawd, nws hloov mus rau theem - mus rau - theem luv thiab ua rau lub sijhawm poob.
Lub hauv paus fault locator tsim los rau qis- cov tshuab hauv av tam sim no tsis nyob ntawm qhov txhaum tam sim no. Nws nyeem cov ntawv kos npe tsis ntev los no hauv xoom- ntu ntu voltage thiab tam sim no, lossis luv luv txhaj cov teeb liab tshwj xeeb, txhawm rau txiav txim siab txog kev taw qhia thiab ntu ntawm lub hauv paus Circuit Court. Nruab rau hauv cov khoom xa tuaj, cov tsheb npav khi, lossis cov khoom noj tseem ceeb, nws tsis tu ncua saib xyuas cov rwb thaiv tsev tiv thaiv hauv av ntawm txhua qhov tawm mus. Thaum muaj kev txhaum tshwm sim, nws nqaim qhov chaw mus rau qhov tshwj xeeb feeder lossis ntu es tsis txhob tshaj tawm "system av."
Nrog rau theem ntawm kev nthuav dav, cov neeg ua haujlwm tsis tas yuav tso cov khoom muag dig muag. Thaum qhov teeb meem txhaum cai raug txheeb xyuas, nws tuaj yeem raug cais tawm thaum lub sijhawm qis -load qhov rai lossis los ntawm kev hloov dual - qhov chaw, cuam tshuam rau lub hom phiaj Circuit Court. Lub zog txuas ntxiv nyob twj ywm tsis tu ncua, thiab kev daws teeb meem lub sij hawm poob los ntawm cov xuab moos mus rau feeb. Rau qhov chaw tsis muaj neeg saib xyuas lossis chaw nyob nrog ntau lub tsev xauj tsev, kev pom kev deb ntawm qhov chaw pub mis yog qhov txawv txav ua rau ntawm - qhov chaw teb ntau lub hom phiaj.
Tib - theem hauv av faults feem ntau tuaj nrog sib quas ntus arcing. Rov ua dua arc extinction thiab reignition ua rau siab - zaus oscillations thiab overvoltages ib ntus uas tuaj yeem cuam tshuam cov loads rhiab xws li cov khoom siv hluav taws xob server thiab cov chaw khaws cia, ua rau muaj hluav taws xob tsis zoo, kev cuam tshuam ntawm lub waveform, lossis hauv cov xwm txheej hnyav heev hloov UPS thiab cov khoom siv hluav taws xob mus ncig ua si. Tshawb nrhiav thiab tshem tawm qhov txhaum hauv av thaum ntxov inhibits cov kev cuam tshuam ntawm qhov chaw. Cov cuab yeej tsis yog tsuas yog nrhiav qhov tsis raug; nws ua kom lub kaw lus voltage nqus tsev vacuum.
Thaum xaiv ib chav tsev, tsis txhob tsuas xyuas seb nws qhia txog qhov ua txhaum hauv av. Paub meej tias nws phim cov txheej txheem grounding - siab -kuj grounded, arc suppression coil grounded, los yog ungrounded - thiab nws cov qauv tuaj yeem ntes cov cim tsis muaj zog tsis muaj kev nyeem ntawv tsis tseeb thaum ntau lub voj voog ua haujlwm sib luag. Kev sib txuas lus sib txuas yuav tsum koom nrog DCIM lossis lub zog saib xyuas lub platform uas twb muaj lawm. Txwv tsis pub, qhov chaw txhaum nyob twj ywm rau ntawm cov zaub hauv zos, uas txo qis tus nqi. Peb feem ntau pom zoo kom npog qhov siab - cov ntsiab lus cuam tshuam xws li UPS cov tsheb npav tso tawm, qhov ntsuas cua txias, thiab cov hluav taws xob faib hluav taws xob loj hauv cov ntaub ntawv. Qee cov khoom siv kuj tseem muaj qhov yuam kev waveform capture thiab trend loggging, pab tau rau kev soj ntsuam rwb thaiv tsev degradation lub sij hawm.
Hauv cov ntaub ntawv chaw muab hluav taws xob faib hluav taws xob, qhov qis -tam sim no qhov teeb meem hauv av tsis yog kev tiv thaiv ib txwm muaj. Nws ua ntau yam zoo li lub rwb thaiv tsev sentinel - nws tsis mus los lossis poob qis, tab sis taw qhia qhov teeb meem tshwm sim. Rau cov chaw uas muaj lub zog txuas ntxiv mus yog txoj sia, thaum ntxov, meej, tsis muaj - qhov teeb meem nrhiav qhov muaj peev xwm feem ntau tseem ceeb tshaj qhov ua txhaum sai sai tom qab qhov tseeb. Ntxiv nrog rau qhov chaw ua txhaum hauv av nrog rau kev saib xyuas lub zog zoo hauv cov phiaj xwm tag nrho tuaj yeem tshem tawm ntau qhov tsis tau npaj tseg thiab nruab nrab - ntawm -- kho hmo ntuj.
