Ib qho khoom tiv thaiv ncaj, tseem hu ua tus kws tiv thaiv kev tawm tsam lossis SPD, yog tsim los rau SafeGuard hluav taws xob cov khoom siv hluav taws xob uas yuav tshwm sim hauv hluav taws xob hluav taws xob.

Thaum twg muaj kev nce qib tam sim no lossis voltage yog tsim nyob rau hauv hluav taws xob hluav taws xob lossis kev sib txuas lus ntawm lub sijhawm sib txuas lus, tiv thaiv kev cuam tshuam ntawm lwm cov khoom siv ua rau lwm cov khoom siv Cov.

Surge cov khoom tiv thaiv (SPDS) yog txoj kev siv tau nqi kho tau zoo rau kev tiv thaiv kev cuam tshuam thiab txhim kho kev ntseeg tau.

Lawv feem ntau yog ntsia rau hauv cov ntawv xa tawm thiab ua haujlwm tseem ceeb hauv kev ua haujlwm du thiab tsis muaj kev sib tw ntawm cov ntawv thov los ntawm kev txwv kev hloov pauv hloov pauv.

SPD ua haujlwm los ntawm kev hloov pauv ntau dhau los ntawm kev hloov pauv ntawm cov khoom muaj kev tiv thaiv. Nws feem ntau muaj cov hlau oxide varistors (mov) lossis roj tawm roj uas nqus cov av ntau tshaj, yog li tiv thaiv cov khoom siv sib txuas.

Fais fab sholges tuaj yeem tshwm sim vim muaj ntau yam vim li cas, suav nrog cov phiaj xwm hluav taws xob hloov, ua haujlwm ntawm cov khoom siv hluav taws xob siab. Lawv kuj tseem tuaj yeem tshwm sim los ntawm cov xwm txheej tshwm sim hauv lub tsev, xws li qhov pib ntawm cov khoom siv lossis hloov chaw ntawm cov khoom siv loj.

Txhim kho SPD tuaj yeem muab cov txiaj ntsig ob peb, suav nrog:

Kev tiv thaiv ntawm cov khoom siv hluav taws xob sib txawv los ntawm kev ua haujlwm voltage.

Kev tiv thaiv cov ntaub ntawv poob lossis kev noj nyiaj txiag hauv lub computer systems.

Txuas ntxiv ntawm lub neej ntawm cov cuab yeej siv thiab cov cuab yeej los ntawm kev tiv thaiv lawv los ntawm cov hluav taws xob cuam tshuam.

Txo cov kev pheej hmoo ntawm cov hluav taws hluav taws xob los ntawm lub zog hluav taws xob.

Kev sib haum xeeb ntawm lub siab paub tias koj cov cuab yeej muaj txiaj ntsig yog kev nyab xeeb.

Lub neej ntawm SPD tuaj yeem sib txawv raws li qhov zoo li nws qhov zoo, qhov mob hnyav ntawm cov kev sib ntsib, thiab kev tswj hwm kev txij nkawm. Feem ntau, SPDS muaj lub neej dhau los ntawm 5 txog 10 xyoo. Txawm li cas los xij, nws raug nquahu kom tshawb xyuas tsis tu ncua thiab ntsuas SPDS thiab hloov lawv raws li xav tau kom ntseeg tau kev tiv thaiv zoo.

Qhov xav tau rau SPDs yuav txawv nyob ntawm cov tib yam xws li thaj chaw, cov cai tswjfwm hauv zos, thiab rhiab ntawm cov khoom siv hluav taws xob hluav taws xob. Nws raug nquahu kom sab laj cov hluav taws xob tsim nyog los yog hluav taws xob tsim kom ntsuas koj cov kev xav tau thiab txiav txim siab tias SPD yog qhov tsim nyog rau koj cov hluav taws xob.

Ob peb hom kev tiv thaiv-kev tiv thaiv-kev tsim khoom hauv SPDS yog cov hlau oxide (cov menyuam yaus - Mov yog cov siv thev naus laus zis feem ntau siv rau kev tiv thaiv ntawm lub zog hluav taws xob. Kev ntsuam xyuas cov kev ntaus nqi tam sim no ntawm cov mov muaj feem xyuam rau thaj chaw hla kev thiab nws cov lej. Feem ntau, qhov loj dua ntawm thaj chaw hla kev hla, ntau dua qhov kev ntaus nqi tam sim no tam sim no ntawm lub cuab yeej. MOVs generally are of round or rectangular geometry but come in a plethora of standard dimensions ranging from 7 mm (0.28 inch) to 80 mm (3.15 inch). Qhov kev ntaus nqi tam sim no ntawm cov txheej txheem tiv thaiv kev tiv thaiv sib txawv sib txawv thiab yog nyob ntawm cov chaw tsim khoom. Raws li tau sib tham ua ntej lawm nyob rau hauv cov lus no, los ntawm kev sib txuas hauv cov kev ntsuas sib dhos tam sim no, tus nqi sib tw ntxiv rau cov neeg tsiv ua ke kom tau cov kev ntaus nqi tam sim no ntawm kev ntaus nqi ntawm cov khoom siv. Ua li no, kev txiav txim siab yuav tsum tau muab rau kev sib koom tes ua haujlwm.

Muaj ntau ntau cov kev xav ntawm dab tsi tivthaiv, dab tsi topology, thiab kev xa tawm ntawm cov thev naus laus zis tshwj xeeb tshaj plaws rau kev hloov pauv ntawm cov qib tam sim no. Hloov chaw ntawm tag nrho cov kev xaiv, nws yog qhov zoo tshaj plaws uas kev sib tham ntawm kev tawm tsam tam sim no, lossis nce kev tawm tsam tam sim no rub tawm cov ntaub ntawv ntsuas. Tsis hais txog cov khoom siv uas siv hauv kev tsim qauv, lossis cov qauv tshwj xeeb siv, qhov teeb meem yog tias tus nqi them rau kev tawm tsam tam sim no lossis nominal tawm kev ntsuas tam sim no uas haum rau daim ntawv thov.

Tam sim no tsab ntawm IET Wiring cov cai, BS 7671: 2018, 2018, 2018, 2018, 2018, 2017, 2017, 2018, Kev Tiv Thaiv Kev Ruaj Ntseg Los Ntawm Qhov Kev Xaiv Los ntawm Overvoltage tuaj yeem:

Ua rau raug mob hnyav rau, lossis poob ntawm, tib neeg lub neej; lossis

Ua rau muaj kev cuam tshuam ntawm pej xeem cov kev pabcuam thiab kev puas tsuaj rau cov cuab yeej cuab tam; lossis

Ua rau muaj kev cuam tshuam ntawm kev lag luam lossis kev ua ub no; lossis

Cuam tshuam rau cov neeg sib koom tes coob coob.

Cov kev cai no siv rau txhua hom chaw uas suav nrog kev ua haujlwm hauv tsev, ua lag luam thiab kev lag luam.

Whilst lub iet wiring cov cai tsis tau rov qab, qhov chaw ua haujlwm tau tsim tawm ntawm cov kev teeb tsa yav dhau los ntawm IET wiring cov cai, nws yog ib qho tsim nyog yuav kom ntseeg tau tias lub voj voog hloov tau raws li qhov tseeb Tsab, qhov no tsuas yog muaj txiaj ntsig yog tias SPDS raug teeb tsa los tiv thaiv tag nrho cov teeb tsa.

Qhov kev txiav txim siab seb puas yuav SPDS yog nyob rau hauv txhais tes ntawm cov qhua tuaj noj mov, tab sis lawv yuav tsum tau txais cov ntaub ntawv txaus kom paub txiav txim siab seb lawv xav rho nyiaj SPDS. Kev txiav txim siab yuav tsum tau ua raws li kev ntsuas kev nyab xeeb thiab ua kom muaj txiaj ntsig tsawg li ob peb phaus, tiv thaiv tus nqi txuas nrog rau cov khoos phis tawm, TVs thiab cov khoom tsim nyog, Piv txwv, cov pa taws kom pom cov pa taws thiab boiler tswj.

Kev tiv thaiv surge tuaj yeem ntsia tau nyob rau hauv ib lub chaw siv khoom lag luam uas muaj muaj sia nyob lossis, yog tias muaj chaw txaus, nws tuaj yeem ntsia tau qhov chaw nyob sab nraud uas nyob ib sab rau cov neeg siv khoom uas twb muaj lawm.

Nws tseem tsim nyog soj ntsuam nrog koj lub tuam txhab kev pov hwm raws li qee cov cai yuav hais tias cov cuab yeej siv tau them nrog SPD lossis lawv yuav tsis them nyiaj hauv qhov kev thov.

Qhov kev lees paub ntawm tus kws tiv thaiv kev tawm tsam (feem ntau paub txog kev tiv thaiv xob laim) yog ntsuam xyuas raws li IEC 61643-31 & EN 50/1 Cov kev xav tau thiab kev sib txawv. Thawj-theem xob kev tiv thaiv ntaus ntawv yog ntsia nruab nrab ntawm 0-1 cheeb tsam, qhov tsawg kawg nkaus uas yuav tsum tau, qhov tsawg kawg nkaus uas yuav tsum tau, qhov tsawg kawg nkaus (10/350) 12.5 KA, thiab thib ob thiab thib peb Qib tau teeb tsa nruab nrab ntawm 1-2 thiab 2-3 aav, feem ntau yog los tsim kev oververctage.

Surge Cov Khoom Siv Tiv Thaiv (SPDS) yog qhov tseem ceeb hauv kev tiv thaiv cov khoom siv hluav taws xob uas muaj peev xwm ua rau kev puas tsuaj, system poob haujlwm, thiab poob.

Feem ntau, tus nqi ntawm cov khoom siv hloov chaw lossis kho cov txiaj ntsig tuaj yeem yog cov ntawv thov tseem ceeb xws li tsev kho mob, cov chaw zov me nyuam, thiab cov nroj tsuag.

Circuit Court tej tog thiab fuses tsis yog tsim los daws cov xwm txheej zoo no, ua kom muaj kev tiv thaiv ntxiv kev tawm tsam tsim nyog.

Thaum SPDs tshwj xeeb tau tsim tshwj xeeb los hloov pauv hloov pauv ntawm cov cuab yeej, tiv thaiv nws los ntawm kev puas tsuaj thiab ntev nws lifespan.

Hauv kev xaus, SPDDs yog qhov tseem ceeb hauv kev ua haujlwm sov niaj hnub no.

Tus Haujlwm Tshaj Lij Ua Haujlwm

Lub ntsiab cai tseem ceeb tom qab SPDS yog tias lawv muab txoj hauv kev tsis zoo rau hauv av rau ntau tshaj plaws. Thaum voltage spikes los yog surges tshwm sim, SPDS ua haujlwm los ntawm kev hloov pauv qhov ntau tshaj plaws thiab tam sim no rau hauv av.

Nyob rau hauv txoj kev no, qhov ntau ntawm cov khoom siv voltage tau qis dua rau qib kev nyab xeeb uas tsis ua rau cov khoom siv txuas nrog.

Txhawm rau ua haujlwm, ib qho khoom siv Surge kev tiv thaiv yuav tsum muaj tsawg kawg ib qho tsis-linear lossis spark sib txawv ntawm kev hloov pauv ntawm lub xeev siab thiab qis.

Lawv txoj haujlwm yog kom hloov cov kev tawm tsam lossis ua kom muaj tam sim no thiab txwv tsis pub dhau cov khoom siv overvoltage ntawm cov khoom siv hauv qab.

Kev Tiv Thaiv Surge Kev Tiv Thaiv Ua Haujlwm nyob hauv peb cov xwm txheej tau teev hauv qab no.

A. Cov xwm txheej ib txwm muaj (tsis muaj kev nce qib)

Thaum tsis muaj qhov xwm txheej tsis muaj kev cuam tshuam, SPD tsis muaj kev cuam tshuam rau lub kaw lus thiab ua raws li kev qhib Circuit Court, nws nyob hauv lub xeev siab.

B. Lub sijhawm hluav taws xob hluav taws xob

Thaum muaj voltage spikes thiab surges, SPD txav mus rau lub xeev conduction thiab nws cov kev yuam kev poob qis. Nyob rau hauv txoj kev no, nws yuav tiv thaiv lub system los ntawm diverting cov impulse tam sim no rau hauv av.

C. Rov qab ua haujlwm ib txwm muaj

Tom qab cov overvoltage tau raug rho tawm, spd shipping rov qab rau nws lub xeev siab impedance.

Surge Cov Khoom Tiv Thaiv (SPDS) yog cov khoom tseem ceeb ntawm cov khoom siv hluav taws xob. Txawm li cas los xij, xaiv ib qho SPD uas tsim nyog rau koj lub cev yuav yog qhov teeb meem nyuaj.

Qhov Siab Nruam Ua Haujlwm Voltage (UC)

Cov ntsuas hluav taws xob ntawm SPD yuav tsum tau tshaj nrog cov hluav taws xob hluav taws xob kom muaj kev tiv thaiv kom tsim nyog rau cov kab ke. Qhov ntsuas qhov qis qis dua yuav ua rau lub cuab yeej ua puas thiab kev ntaus nqi siab dua yuav tsis hloov chaw kom zoo.

Lub Sijhawm Teb Teb

Nws tau piav raws li lub sijhawm ntawm SPD reacts rau cov hloov chaw. Tus nrawm nrawm, qhov kev tiv thaiv zoo los ntawm SPD. Feem ntau, zener diode raws SPDS muaj cov lus teb ceev tshaj plaws. Cov roj puv hom muaj lub sijhawm qeeb qeeb thiab Fuses thiab cov hom mov tau muaj lub sijhawm teb qeeb tshaj plaws.

Nominal tawm tam sim no (hauv)

SPD yuav tsum tau kuaj ntawm 8 / 20μs WaveForm thiab tus nqi raug rau cov me me SPD yog 20ka.

Qhov siab tshaj plaws tawm sai sai (iimp)

Lub cuab yeej yuav tsum muaj peev xwm los ua kom tau qhov siab tshaj plaws tam sim no uas xav tau ntawm lub network faib kom ntseeg tau tias nws tsis ua tiav thaum muaj 10/550μs WaveForm.

Clamping Voltage

Qhov no yog qhov ntsuas hluav taws xob thiab qhov tseem ceeb tshaj plaws ntawm cov hluav taws xob qib, SPD pib mus clampage txhua qhov hluav taws xob uas nws pom nyob rau hauv lub hwj huam.

Chaw tsim tshuaj paus thiab ntawv pov thawj

Xaiv SPD los ntawm cov chaw tsim khoom muaj npe muaj txiaj ntsig uas muaj ntawv pov thawj los ntawm kev kuaj lub tsev kuaj mob, xws li UEC lossis IEC, yog qhov tseem ceeb heev. Daim ntawv pov thawj lav tau tias cov khoom tau raug tshuaj xyuas thiab dhau txhua qhov kev ua tau zoo thiab kev nyab xeeb.

Nkag siab cov lus qhia sizing no yuav ua rau koj xaiv qhov ntsuas zoo tshaj plaws rau koj cov kev xav tau thiab lav tau kev tiv thaiv zoo nkauj.

Surge Cov Khoom Siv Tiv Thaiv (SPDS) tau tsim kho kom muab kev tiv thaiv txhim khu kev qha tawm tsam cov kev hloov pauv ntawm cov kev hloov pauv, tab sis qee yam tseem ceeb tuaj yeem ua rau lawv tsis ua tiav. Hauv qab no yog qee qhov ntawm cov laj thawj tom qab SPDS tsis ua haujlwm:

1.Txhais kev sib luag

Ib qho ua rau muaj kev ua tiav ntawm SPD tsis ua hauj lwm yog overVoltage, overvoltage tuaj yeem tshwm sim vim tias xob laim, muaj hwj chim cuam tshuam. Nco ntsoov tias nruab txoj cai ntawm SPD tom qab tsim nyog tsim qauv raws li qhov chaw nyob.

2. | cov khoom

Vim ib puag ncig cov xwm txheej thiab cov av noo, SPDS muaj lub neej txwv thiab tej zaum yuav tsis meej pem sijhawm. Tsis tas li ntawd, SPDDs tuaj yeem tsim kev puas tsuaj los ntawm cov voltage nquag heev.

3.Configuration teeb meem

Kev ua txhaum cai tsis meej, xws li thaum teeb tsa Wye-Configured SPD tau txuas rau ib lub nra uas txuas nrog ntawm Delta. Qhov no tuaj yeem ua rau SPD rau ntau dua voltages, uas tuaj yeem ua rau SPD tsis ua haujlwm.

4.Xiv tau tsis ua hauj lwm

SpDs muaj ntau lub Cheebtsam, xws li hlau oxide varistors (mov), uas tuaj yeem poob vim kev tsim khoom lossis ib puag ncig.

5.impropper grounding

Rau SPD los ua haujlwm kom zoo, yog qhov tsim nyog. Tus SPD tuaj yeem ua siab phem lossis muaj kev txhawj xeeb nyab xeeb yog tias nws tsis raug.