Ib qho kev tiv thaiv overvoltage yog ib qho tseem ceeb ntawm cov cuab yeej siv hauv cov tshuab hluav taws xob los tiv thaiv cov hluav taws xob tsis zoo thiab ua kom muaj kev nyab xeeb ntawm kev nyab xeeb thiab ruaj khov ntawm cov khoom siv hluav taws xob. Nws lub luag haujlwm tseem ceeb yog kom ceev cov overvoltages kom nyob rau hauv qhov kev siv tau rau cov khoom siv thaum muaj xwm txheej xws li xob laim, hloov impulses, lub zog zaus voltage nce, lossis resonant overvoltages tshwm sim hauv daim phiaj hluav taws xob. Qhov no tiv thaiv kev puas tsuaj ntawm rwb thaiv tsev, tiv thaiv kev puas tsuaj, thiab kaw lub kaw lus, yog li muab kev tiv thaiv tsis tuaj yeem hloov pauv hauv txhua yam ntawm kev tsim hluav taws xob, kev sib kis, kev faib tawm, thiab kev siv.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm tus tiv thaiv overvoltage yog ua raws li cov yam ntxwv uas tsis yog-linear tsis kam thiab lub zog nqus cov txheej txheem. Feem ntau siv cov khoom tseem ceeb xws li hlau oxide varistors (MOVs), silicon carbide varistors, tso tawm qhov khoob, thiab cov khoom sib xyaw ua ke. Thaum qhov hluav taws xob nyob hauv qhov ib txwm muaj, tus tiv thaiv ua haujlwm nyob rau hauv siab -tsis kam, tsis cuam tshuam rau kev ua haujlwm ntawm lub cev. Thaum qhov hluav taws xob siab tshaj qhov chaw pib, nws qhov kev tiv thaiv poob qis, ua rau qis - txoj kev tiv thaiv, hla lossis txwv cov overcurrent generated los ntawm overvoltage rau hauv av, yog li txo qhov voltage ncov siv rau cov khoom tiv thaiv. Ntau hom kev tiv thaiv overvoltage kuj tuaj yeem ua ke nrog thermal tripping, fuses, lossis interlocking keyboards kom ua tiav qhov cuam tshuam tam sim no thiab cov xwm txheej qhia, ntsuas cov lus teb sai thiab kev sib cais muaj kev nyab xeeb.
Nyob rau hauv daim ntawv thov, overvoltage tiv thaiv yuav muab faib ua low-voltage, nruab nrab-voltage, thiab high-voltage series los hloov mus rau qhov sib txawv voltage theem thiab installation ib puag ncig. Tsawg- hom hluav taws xob feem ntau yog siv rau hauv kev tsim hluav taws xob faib hluav taws xob, chaw sib txuas lus hauv paus chaw nres tsheb, cov khoom siv hluav taws xob tsheb thauj mus los, thiab cov khoom siv hluav taws xob sab pem hauv ntej kom tiv thaiv kev puas tsuaj los ntawm xob laim lossis kab sib hloov. Nruab nrab-voltage hom feem ntau pom muaj nyob rau hauv kev faib khoom transformers, switchgear, thiab industrial motor control centers los tiv thaiv kev sib koom ua ke ntawm kev ua haujlwm overvoltages thiab atmospheric overvoltages. High- hom hluav taws xob tau muab tso rau ntawm cov chaw nres tsheb hauv chaw nres tsheb, cov kab hluav taws xob, thiab cov kab hluav taws xob txhawm rau txhawm rau txhawm rau cuam tshuam cov hluav taws xob dhau los los ntawm qhov ntev - xob laim nyob deb thiab lub zog resonance. Rau cov chaw tsim hluav taws xob tshiab, lub zog khaws cia, thiab DC microgrids, DC overvoltage protectors muaj peev xwm tswj tau cov hluav taws xob hluav taws xob los ntawm kev hloov pauv hloov cov txheej txheem thiab kev hloov pauv ntawm lub hnub ci hluav taws xob, txhim kho qhov muaj peev xwm ntawm kab hluav taws xob- khoom siv txuas.
Cov txiaj ntsig zoo ntawm cov khoom tiv thaiv overvoltage yog xav txog hauv lawv cov lus teb ceev ceev, muaj zog nqa tam sim no, thiab kev saib xyuas lub neej. High- cov khoom lag luam zoo tuaj yeem pib hauv nanoseconds mus rau microseconds, nqus cov dej ntws tawm ntawm kaum ntawm kiloamperes, thiab muab cov lus tawm tswv yim txog kev degradation tiam sis los ntawm kev tsim- nyob rau hauv qhov kub thiab txias sensors los yog kev saib xyuas kev sib tshuam, muab kev txhawb nqa rau kev saib xyuas. Modular thiab pluggable designs pab txhawb kev hloov pauv, txo lub sijhawm hluav taws xob; nplaim taws-retardant, tawg- pov thawj, thiab corrosion-cov vaj tse tiv taus kom ntev- lub sij hawm cia siab rau sab nraum zoov, tshuaj lom neeg, los yog marine ib puag ncig.
Nrog rau qhov nyuaj ntawm cov tshuab hluav taws xob thiab kev sib txawv ntawm qhov ua rau overvoltage, overvoltage protectors tau hloov zuj zus mus rau ntau yam - kev sib koom ua ke thiab kev txawj ntse. Piv txwv li, kev sib koom ua ke ntawm kev suav suav, kev ntsuas kev puas tsuaj, thiab kev sib txuas lus hauv thaj chaw deb tuaj yeem tsim kom muaj kev paub txog kev mob nkeeg thiab kev ceeb toom ntxov; kev sib txuas nrog kev rov kaw tsis siv neeg thiab cov ntaub ntawv kaw lus tsis raug tuaj yeem khaws cov ntaub ntawv ua tiav thaum tiv thaiv overvoltages, muab kev txhawb nqa rau kev soj ntsuam kev sib tsoo.
Zuag qhia tag nrho, cov tiv thaiv overvoltage, nrog rau lawv cov haujlwm tseem ceeb ntawm kev txwv qhov hluav taws xob ceev, lub zog dissipation, thiab kev tiv thaiv rwb thaiv tsev, tsim thawj kab ntawm kev tiv thaiv tiv thaiv ib ntus thiab ntu ntu overvoltages. Lawv yog cov cuab yeej siv tseem ceeb rau kev ua kom muaj kev nyab xeeb thiab ruaj khov ntawm cov tshuab hluav taws xob thiab txuas cov cuab yeej siv lub neej, ua lub luag haujlwm tseem ceeb hauv cov phiaj xwm niaj hnub thiab ntau yam kev siv hluav taws xob.
