A: Qhov no yog ib lo lus nug uas ntau cov khoom lag luam xav nug, thiab tau kawg cov lus teb feem ntau yog "vim tias tus qauv kev nyab xeeb tau teev tseg."Yog tias koj tuaj yeem nkag siab tob txog keeb kwm ntawm hluav taws xob kev nyab xeeb cov cai, koj yuav pom lub luag haujlwm tom qab nws.nrog lub ntsiab lus.Txawm hais tias kev ntsuam xyuas kev nyab xeeb hluav taws xob yuav siv sij hawm me ntsis ntawm cov kab ntau lawm, nws tso cai rau koj los txo qhov kev pheej hmoo ntawm cov khoom siv rov ua dua tshiab vim muaj hluav taws xob txaus ntshai.Tau txais nws thawj zaug yog txoj hauv kev kom txo tau cov nqi thiab tswj kev ua siab zoo.
A: Kev ntsuas hluav taws xob puas tsuaj feem ntau yog muab faib ua plaub yam hauv qab no: Dielectric Withstand / Hipot Test: Kev ntsuas hluav taws xob tiv thaiv siv hluav taws xob siab rau lub zog thiab hauv av circuits ntawm cov khoom thiab ntsuas nws lub xeev tawg.Isolation Resistance Test: Ntsuas qhov hluav taws xob rwb thaiv tsev lub xeev ntawm cov khoom.Kev Ntsuam Xyuas Tam Sim No: Tshawb xyuas seb qhov xau tam sim no ntawm AC / DC fais fab mov rau hauv av davhlau ya nyob twg tshaj tus qauv.Kev tiv thaiv hauv av: Ntsuam xyuas seb cov txheej txheem hlau siv tau puas yog hauv av zoo.
A: Rau kev nyab xeeb ntawm cov neeg kuaj hauv cov chaw tsim khoom lossis cov chaw kuaj sim, nws tau raug coj los siv hauv Tebchaws Europe tau ntau xyoo.Txawm hais tias nws yog cov chaw tsim khoom thiab cov neeg sim khoom siv hluav taws xob, cov khoom siv thev naus laus zis, cov khoom siv hauv tsev, cov cuab yeej siv tshuab lossis lwm yam khoom siv, nyob rau hauv ntau yam kev tswj hwm kev nyab xeeb muaj cov tshooj hauv cov kev cai, txawm tias nws yog UL, IEC, EN, uas suav nrog kev ntsuas thaj tsam (cov neeg ua haujlwm qhov chaw, ntsuas qhov chaw, DUT qhov chaw), cov cuab yeej kos npe (kom meej meej cim "kev phom sij" lossis cov khoom nyob rau hauv kev sim), lub hauv paus ntawm cov cuab yeej ua haujlwm thiab lwm qhov chaw cuam tshuam, thiab hluav taws xob rwb thaiv tsev muaj peev xwm ntawm txhua yam khoom siv ntsuas (IEC 61010).
A: Nrog rau qhov ntsuas hluav taws xob lossis qhov ntsuas hluav taws xob siab (HIPOT test) yog 100% tus qauv siv los xyuas qhov zoo thiab hluav taws xob kev nyab xeeb yam ntxwv ntawm cov khoom (xws li cov yuav tsum tau los ntawm JSI, CSA, BSI, UL, IEC, TUV, thiab lwm yam. Cov koom haum kev nyab xeeb) Nws kuj yog qhov paub zoo tshaj plaws thiab nquag ua ntau lawm kab kev nyab xeeb kuaj.HIPOT xeem yog ib qho kev xeem uas tsis muaj kev puas tsuaj los txiav txim siab tias cov khoom siv hluav taws xob hluav taws xob muaj peev xwm tiv taus cov hluav taws xob tsis zoo, thiab yog qhov ntsuas hluav taws xob siab uas siv tau rau txhua yam khoom siv los xyuas kom meej tias cov khoom siv insulating txaus.Lwm yam laj thawj los ua HIPOT kuaj yog tias nws tuaj yeem kuaj pom qhov tsis xws luag xws li tsis txaus nkag mus deb thiab tshem tawm thaum lub sijhawm tsim khoom.
A: Feem ntau, qhov hluav taws xob waveform hauv lub zog hluav taws xob yog sine yoj.Thaum lub sijhawm ua haujlwm ntawm lub zog hluav taws xob, vim yog xob laim, kev ua haujlwm, kev ua haujlwm tsis raug lossis tsis raug qhov sib piv ntawm cov khoom siv hluav taws xob, qhov hluav taws xob ntawm qee qhov ntawm lub kaw lus dheev sawv thiab zoo heev tshaj nws cov ntsuas hluav taws xob, uas yog overvoltage.Overvoltage tuaj yeem muab faib ua ob pawg raws li nws cov laj thawj.Ib qho yog qhov overvoltage tshwm sim los ntawm xob laim ncaj qha lossis xob laim induction, uas yog hu ua sab nraud overvoltage.Qhov loj ntawm xob laim impulse tam sim no thiab impulse voltage yog loj, thiab lub sij hawm luv luv, uas yog heev puas.Txawm li cas los xij, vim tias cov kab hluav taws xob ntawm 3-10kV thiab qis dua hauv cov nroog thiab cov chaw lag luam dav dav tau tiv thaiv los ntawm kev cob qhia lossis cov tsev siab, qhov tshwm sim ntawm kev raug ncaj qha los ntawm xob laim yog qhov tsawg heev, uas muaj kev nyab xeeb.Tsis tas li ntawd, dab tsi tau tham ntawm no yog cov khoom siv hluav taws xob hauv tsev, uas tsis yog nyob rau hauv cov ntsiab lus saum toj no, thiab yuav tsis tham ntxiv.Lwm hom yog tshwm sim los ntawm kev hloov pauv hluav taws xob lossis kev hloov pauv hauv lub zog hluav taws xob, xws li haum rau cov kab tsis muaj kev thauj khoom, txiav tawm qhov tsis muaj qhov hloov pauv, thiab ib-theem arc grounding hauv qhov system, uas yog hu ua internal overvoltage.Internal overvoltage yog lub hauv paus tseem ceeb rau kev txiav txim siab qhov kev tiv thaiv ib txwm muaj ntawm ntau yam khoom siv hluav taws xob hauv lub zog hluav taws xob.Uas yog hais tias, tus tsim ntawm lub rwb thaiv tsev qauv ntawm cov khoom yuav tsum xav txog tsis tau tsuas yog lub rated voltage tab sis kuj lub internal overvoltage ntawm cov khoom siv ib puag ncig.Kev ntsuas hluav taws xob tiv thaiv yog txhawm rau txheeb xyuas seb cov txheej txheem rwb thaiv tsev ntawm cov khoom tuaj yeem tiv taus lub zog sab hauv ntawm lub zog hluav taws xob.
A: Feem ntau AC tiv thaiv qhov ntsuas hluav taws xob tau txais txiaj ntsig zoo rau cov koom haum kev nyab xeeb dua li DC tiv thaiv qhov ntsuas hluav taws xob.Lub ntsiab yog vim li cas feem ntau cov khoom nyob rau hauv kev ntsuam xyuas yuav ua hauj lwm nyob rau hauv AC voltage, thiab AC withstand voltage test muaj qhov zoo ntawm alternating ob polarities rau kev ntxhov siab rau lub rwb thaiv tsev, uas yog ze rau qhov kev nyuaj siab cov khoom yuav ntsib nyob rau hauv tiag tiag siv.Txij li thaum qhov kev xeem AC tsis them tus nqi thauj khoom, qhov kev nyeem tam sim no tseem zoo ib yam los ntawm qhov pib ntawm daim ntawv thov voltage mus rau qhov kawg ntawm qhov kev xeem.Yog li ntawd, tsis tas yuav ramp up voltage vim tsis muaj teeb meem stabilization yuav tsum tau saib xyuas tam sim no nyeem.Qhov no txhais tau hais tias tshwj tsis yog cov khoom nyob rau hauv kev sim ntsuas qhov ntsuas tam sim ntawd, tus neeg teb xov tooj tuaj yeem siv tam sim ntawd qhov hluav taws xob tag nrho thiab nyeem tam sim no yam tsis tau tos.Txij li thaum lub AC voltage tsis them lub load, tsis tas yuav tso tawm cov cuab yeej nyob rau hauv kev sim tom qab kev xeem.
A: Thaum kuaj cov loads capacitive, tag nrho cov tam sim no muaj cov reactive thiab to tam sim no.Thaum tus nqi ntawm cov reactive tam sim no ntau dua li qhov tseeb to tam sim no, nws yuav nyuaj rau kev txheeb xyuas cov khoom uas muaj cov dej xau ntau dhau.Thaum kuaj cov loads loj loj, tag nrho cov tam sim no xav tau ntau dua li qhov xau tam sim no nws tus kheej.Qhov no tej zaum yuav muaj kev phom sij ntau dua vim tias tus neeg teb xov tooj raug cuam tshuam rau cov dej ntws ntau dua
A: Thaum lub cuab yeej nyob rau hauv kev sim (DUT) raug them tag nrho, tsuas yog qhov tseeb qhov dej ntws tam sim no.Qhov no ua rau DC Hipot Tester kom pom tseeb qhov tseeb ntawm cov khoom tam sim no hauv kev sim.Vim tias qhov them tam sim no luv luv, lub zog yuav tsum tau ua ntawm DC tiv thaiv hluav taws xob tuaj yeem feem ntau tsawg dua li ntawm AC tiv thaiv hluav taws xob siv los ntsuas tib yam khoom.
A: Txij li thaum DC tiv thaiv qhov ntsuas hluav taws xob tsis them DUT, txhawm rau tshem tawm qhov kev pheej hmoo ntawm hluav taws xob poob siab rau tus neeg teb xov tooj tuav DUT tom qab qhov ntsuas hluav taws xob tiv thaiv, DUT yuav tsum raug tso tawm tom qab kev sim.Qhov ntsuas DC them tus nqi capacitor.Yog tias DUT tiag tiag siv AC fais fab, DC txoj kev tsis simulate qhov tseeb.
A: Muaj ob hom kev ntsuas qhov ntsuas hluav taws xob: AC tiv taus qhov ntsuas hluav taws xob thiab DC tiv thaiv qhov ntsuas hluav taws xob.Vim yog cov yam ntxwv ntawm cov ntaub ntawv insulating, cov txheej txheem tawg ntawm AC thiab DC voltages txawv.Feem ntau cov ntaub ntawv insulating thiab cov tshuab muaj ntau hom xov xwm sib txawv.Thaum qhov ntsuas hluav taws xob AC siv rau nws, qhov hluav taws xob yuav raug faib ua feem rau qhov tsis xws li qhov dielectric tas li thiab qhov ntev ntawm cov khoom.Thaum DC voltage tsuas yog faib cov voltage nyob rau hauv kev faib ua feem rau qhov tsis kam ntawm cov khoom.Thiab qhov tseeb, kev tawg ntawm cov qauv insulating feem ntau tshwm sim los ntawm hluav taws xob tawg, thermal tawg, tso tawm thiab lwm yam ntaub ntawv tib lub sijhawm, thiab nws yog ib qho nyuaj rau cais lawv tag nrho.Thiab AC voltage nce qhov muaj peev xwm ntawm thermal tawg dhau DC voltage.Yog li ntawd, peb ntseeg tias AC tiv thaiv qhov ntsuas hluav taws xob yog qhov nruj dua li DC tiv thaiv qhov ntsuas hluav taws xob.Hauv kev ua haujlwm tiag tiag, thaum ua qhov ntsuas qhov ntsuas hluav taws xob, yog tias DC siv rau qhov ntsuas qhov ntsuas hluav taws xob, qhov ntsuas hluav taws xob yuav tsum siab dua qhov ntsuas hluav taws xob ntawm AC fais fab zaus.Qhov ntsuas hluav taws xob ntawm DC qhov ntsuas qhov ntsuas hluav taws xob tau muab faib ua qhov K tas mus li los ntawm tus nqi zoo ntawm AC test voltage.Los ntawm kev sib piv cov kev ntsuam xyuas, peb muaj cov txiaj ntsig hauv qab no: rau cov khoom siv hlau thiab cable, qhov tas li K yog 3;rau kev lag luam aviation, qhov tas li K yog 1.6 txog 1.7;CSA feem ntau siv 1.414 rau cov khoom siv pej xeem.
A: Qhov ntsuas hluav taws xob uas txiav txim siab qhov ntsuas qhov ntsuas hluav taws xob nyob ntawm kev ua lag luam koj cov khoom yuav raug muab tso rau hauv, thiab koj yuav tsum ua raws li cov qauv kev nyab xeeb lossis cov kev cai uas yog ib feem ntawm lub teb chaws cov cai tswj kev lag luam.Qhov ntsuas hluav taws xob thiab lub sijhawm ntsuas ntawm qhov ntsuas qhov ntsuas hluav taws xob tau teev nyob rau hauv tus qauv kev nyab xeeb.Qhov xwm txheej zoo tshaj plaws yog nug koj tus neeg siv khoom kom muab cov kev xeem cuam tshuam rau koj.Qhov ntsuas hluav taws xob ntawm qhov ntsuas qhov ntsuas hluav taws xob dav dav yog raws li hauv qab no: yog tias qhov ua haujlwm voltage nyob nruab nrab ntawm 42V thiab 1000V, qhov ntsuas hluav taws xob yog ob npaug ntawm qhov ua haujlwm voltage ntxiv rau 1000V.Qhov ntsuas hluav taws xob no yog siv rau 1 feeb.Piv txwv li, rau cov khoom lag luam ntawm 230V, qhov ntsuas hluav taws xob yog 1460V.Yog tias lub sijhawm siv hluav taws xob luv luv, qhov ntsuas hluav taws xob yuav tsum tau nce ntxiv.Piv txwv li, cov kab ntau lawm xeem tej yam kev mob nyob rau hauv UL 935:
| mob | Lub sijhawm thov (seconds) | siv voltage |
| A | 60 | 1000V + (2 x V) |
| B | 1 | 1200V + (2.4xV) |
| V = siab tshaj qhov ntsuas voltage | ||
A: Lub peev xwm ntawm Hipot Tester yog hais txog nws lub zog tso zis.Lub peev xwm ntawm qhov ntsuas hluav taws xob tiv thaiv yog txiav txim siab los ntawm qhov siab tshaj plaws tso zis tam sim no x qhov siab tshaj qhov tso zis hluav taws xob.Piv txwv li: 5000Vx100mA = 500VA
A: Lub stray capacitance ntawm cov khoom kuaj yog qhov laj thawj tseem ceeb rau qhov sib txawv ntawm qhov ntsuas qhov ntsuas ntawm AC thiab DC tiv thaiv qhov ntsuas hluav taws xob.Cov stray capacitances tej zaum yuav tsis raug them tag nrho thaum kuaj nrog AC, thiab yuav muaj qhov txuas mus tas li ntws los ntawm cov stray capacitances.Nrog rau qhov kev xeem DC, ib zaug qhov kev tsis txaus ntseeg ntawm DUT tau them tag nrho, qhov tseem tshuav yog qhov tam sim no ntawm DUT.Yog li ntawd, tus nqi hluav taws xob tam sim no ntsuas los ntawm AC withstand voltage test thiab DC withstand voltage test yuav txawv.
A: Insulators tsis yog-conductive, tab sis qhov tseeb yuav luag tsis muaj cov khoom insulating yog kiag li tsis-conductive.Rau txhua yam khoom siv insulating, thaum muaj hluav taws xob siv thoob plaws nws, qee qhov tam sim no yuav ib txwm ntws los ntawm.Lub active tivthaiv ntawm qhov tam sim no yog hu ua leakage tam sim no, thiab qhov tshwm sim no tseem hu ua leakage ntawm lub insulator.Rau qhov kev ntsuam xyuas ntawm cov khoom siv hluav taws xob, cov dej xau tam sim no yog hais txog qhov tam sim no tsim los ntawm qhov nruab nrab ib puag ncig los yog insulating nto ntawm cov hlau qhov chaw nrog kev sib nrig sib rwb thaiv tsev, los yog nruab nrab ntawm qhov chaw nyob thiab hauv av hauv qhov tsis muaj qhov txhaum siv hluav taws xob.yog lub leakage tam sim no.Raws li US UL tus qauv, cov xau tam sim no yog qhov tam sim no uas tuaj yeem ua los ntawm cov khoom siv hauv tsev, suav nrog cov khoom siv hluav taws xob sib txuas.Cov xau tam sim no suav nrog ob ntu, ib feem yog qhov kev hloov pauv tam sim no I1 los ntawm kev tiv thaiv kev tiv thaiv;Lwm qhov yog qhov hloov pauv tam sim no I2 los ntawm kev faib cov peev txheej, qhov kawg capacitive reactance yog XC = 1/2pfc thiab inversely proportional rau lub hwj huam mov zaus, thiab cov faib capacitance tam sim no nce nrog zaus.nce, yog li cov xau tam sim no nce nrog qhov zaus ntawm cov khoom siv fais fab.Piv txwv li: siv thyristor rau cov khoom siv hluav taws xob, nws cov khoom sib haum xeeb ua rau kom cov xau tam sim no.
A: Kev ntsuas hluav taws xob tiv thaiv yog txhawm rau txheeb xyuas qhov ntws tawm tam sim no los ntawm kev rwb thaiv tsev ntawm cov khoom nyob rau hauv kev sim, thiab siv qhov hluav taws xob siab tshaj qhov ua haujlwm voltage rau lub rwb thaiv tsev;thaum lub hwj chim to tam sim no (hu rau tam sim no) yog txhawm rau txheeb xyuas qhov xau tam sim no ntawm cov khoom nyob rau hauv kev sim nyob rau hauv ib txwm ua haujlwm.Ntsuas qhov xau tam sim no ntawm cov khoom ntsuas raws li qhov tsis zoo tshaj plaws (voltage, zaus).Yooj yim muab tso, qhov hluav taws xob tam sim no ntawm qhov ntsuas hluav taws xob tiv thaiv yog qhov ntsuas tam sim no nyob rau hauv tsis muaj lub zog ua haujlwm, thiab lub zog hluav taws xob tam sim no (hu rau tam sim no) yog qhov xau tam sim no ntsuas raws li kev ua haujlwm ib txwm muaj.
A: Rau cov khoom siv hluav taws xob ntawm cov qauv sib txawv, qhov ntsuas ntawm qhov kov tam sim no kuj muaj qhov xav tau sib txawv, tab sis feem ntau, kov tam sim no tuaj yeem muab faib ua av tiv tauj tam sim no Ground Leakage Tam sim no, nto-rau-hauv av tiv tauj tam sim no Nto rau Kab Leakage Tam sim no thiab nto. -to-line Leakage Tam sim no Peb kov tam sim no Nto rau Ntog Leakage Tam sim no kev sim
A: Cov khoom siv hlau siv tau los yog cov khoom siv hluav taws xob ntawm cov khoom siv hauv chav kawm I yuav tsum muaj qhov zoo hauv av raws li kev tiv thaiv kev tiv thaiv hluav taws xob uas tsis yog cov rwb thaiv tsev yooj yim.Txawm li cas los xij, peb feem ntau ntsib qee cov neeg siv uas arbitrarily siv Class I cov cuab yeej raws li Class II cov cuab yeej, los yog ncaj qha unplug lub hauv av davhlau ya nyob twg (GND) ntawm lub hwj chim input kawg ntawm chav kawm ntawv I cov cuab yeej, yog li muaj tej yam kev nyab xeeb txaus ntshai.Txawm li cas los xij, nws yog lub luag haujlwm ntawm cov chaw tsim khoom kom tsis txhob muaj kev phom sij rau tus neeg siv los ntawm qhov xwm txheej no.Qhov no yog vim li cas qhov kev ntsuas tam sim no ua tiav.
A: Thaum lub sij hawm AC tiv thaiv qhov ntsuas hluav taws xob, tsis muaj tus qauv vim yog qhov sib txawv ntawm cov khoom kuaj, muaj qhov tsis muaj peev xwm nyob hauv cov khoom kuaj, thiab qhov ntsuas qhov sib txawv, yog li tsis muaj tus qauv.
A: Txoj hauv kev zoo tshaj plaws los txiav txim siab qhov ntsuas hluav taws xob yog teeb tsa raws li qhov tshwj xeeb xav tau rau kev xeem.Feem ntau hais lus, peb yuav teeb qhov ntsuas hluav taws xob raws li 2 npaug ntawm qhov ua haujlwm voltage ntxiv rau 1000V.Piv txwv li, yog tias qhov ua haujlwm voltage ntawm ib yam khoom yog 115VAC, peb siv 2 x 115 + 1000 = 1230 Volt raws li qhov ntsuas hluav taws xob.Tau kawg, qhov ntsuas hluav taws xob kuj tseem yuav muaj qhov sib txawv vim qhov sib txawv ntawm cov txheej txheem insulating.
A: Peb lo lus no txhua tus muaj lub ntsiab lus zoo ib yam, tab sis feem ntau siv sib hloov hauv kev sim kev lag luam.
A: Kev ntsuas kev tiv thaiv hluav taws xob thiab tiv thaiv qhov ntsuas hluav taws xob zoo sib xws.Siv DC voltage txog li 1000V rau ob lub ntsiab lus los kuaj.Qhov ntsuas IR feem ntau muab cov nqi tiv thaiv hauv megohms, tsis yog Pass / Fail sawv cev los ntawm Hipot xeem.Feem ntau, qhov ntsuas hluav taws xob yog 500V DC, thiab tus nqi hluav taws xob tiv thaiv (IR) yuav tsum tsis txhob tsawg dua ob peb megohms.Kev ntsuas kev tiv thaiv hluav taws xob yog qhov kev sim tsis muaj kev puas tsuaj thiab tuaj yeem tshawb xyuas seb qhov rwb thaiv tsev puas zoo.Hauv qee qhov kev qhia tshwj xeeb, kev ntsuas hluav taws xob tiv thaiv yog ua ntej thiab tom qab ntawd qhov ntsuas ntsuas hluav taws xob tiv thaiv.Thaum qhov kev ntsuas hluav taws xob tiv thaiv tsis ua haujlwm, qhov ntsuas hluav taws xob tiv thaiv feem ntau ua tsis tiav.
A: Kev ntsuas kev sib txuas hauv av, qee tus neeg hu ua av txuas ntxiv (Ground Continuity), ntsuas qhov impedance ntawm DUT khib thiab hauv av ncej.Kev ntsuam xyuas hauv av txiav txim siab seb DUT txoj kev tiv thaiv hluav taws xob puas tuaj yeem tswj tau qhov txhaum tam sim no yog tias cov khoom ua tsis tiav.Cov ntawv cog lus hauv av yuav tsim qhov siab tshaj plaws ntawm 30A DC tam sim no lossis AC rms tam sim no (CSA yuav tsum ntsuas 40A) los ntawm kev ntsuas hauv av kom txiav txim siab qhov impedance ntawm hauv av Circuit Court, uas feem ntau qis dua 0.1 ohms.
A: Kev kuaj IR yog qhov kev xeem zoo uas muab qhov qhia txog qhov zoo ntawm cov rwb thaiv tsev.Nws feem ntau yog kuaj nrog DC voltage ntawm 500V lossis 1000V, thiab qhov tshwm sim yog ntsuas nrog megohm tsis kam.Kev ntsuas hluav taws xob tiv thaiv kuj tseem siv qhov hluav taws xob siab rau lub cuab yeej hauv kev sim (DUT), tab sis qhov siv hluav taws xob tau siab dua li ntawm IR test.Nws tuaj yeem ua tau ntawm AC lossis DC voltage.Cov txiaj ntsig tau ntsuas hauv milliamps lossis microamps.Hauv qee qhov tshwj xeeb, IR kuaj ua ntej, tom qab ntawd los ntawm kev ntsuas qhov ntsuas hluav taws xob.Yog tias lub cuab yeej nyob rau hauv kev sim (DUT) ua tsis tiav IR xeem, lub cuab yeej hauv kev sim (DUT) kuj ua tsis tau qhov ntsuas hluav taws xob ntawm qhov hluav taws xob ntau dua.
A: Lub hom phiaj ntawm qhov kev ntsuam xyuas hauv av impedance yog los xyuas kom meej tias cov xaim hluav taws xob tiv thaiv tuaj yeem tiv taus qhov kev ua txhaum tam sim no kom ntseeg tau tias muaj kev nyab xeeb ntawm cov neeg siv thaum muaj xwm txheej tsis zoo tshwm sim hauv cov khoom siv.Cov qauv ntsuas kev nyab xeeb yuav tsum muaj qhov siab tshaj plaws qhov hluav taws xob qhib qhov hluav taws xob yuav tsum tsis txhob tshaj qhov txwv ntawm 12V, uas yog raws li tus neeg siv cov kev xav txog kev nyab xeeb.Thaum qhov kev ntsuam xyuas tsis ua tiav, tus neeg teb xov tooj tuaj yeem raug txo kom muaj kev pheej hmoo ntawm hluav taws xob poob siab.Tus qauv dav dav xav kom cov av tiv thaiv yuav tsum tsawg dua 0.1ohm.Nws raug nquahu kom siv AC tam sim no ntsuas nrog zaus ntawm 50Hz lossis 60Hz kom tau raws li qhov chaw ua haujlwm tiag tiag ntawm cov khoom.
A: Muaj qee qhov sib txawv ntawm qhov ntsuas qhov ntsuas hluav taws xob thiab qhov ntsuas hluav taws xob xau, tab sis feem ntau, cov kev sib txawv no tuaj yeem ua tiav raws li hauv qab no.Fallagert ntsuas yog siv ntau voltage kom cov rwb thaiv tsev los txiav txim siab tias cov khoom lag luam txaus no tam sim no.Kev ntsuam xyuas tam sim no yog los ntsuas cov dej ntws tawm uas ntws los ntawm cov khoom raws li qhov qub thiab ib qho txhaum cai ntawm lub zog hluav taws xob thaum cov khoom siv.
A: Qhov txawv ntawm lub sij hawm tso tawm yog nyob ntawm qhov muaj peev xwm ntawm cov khoom kuaj thiab qhov hluav taws xob tawm ntawm qhov ntsuas hluav taws xob tiv thaiv.Qhov siab dua qhov capacitance, ntev lub sij hawm tso tawm yuav tsum tau.
A: Cov cuab yeej siv hauv chav kawm I txhais tau hais tias cov khoom siv tau nkag mus tau txuas nrog cov khoom siv tiv thaiv hauv av;Thaum cov txheej txheem rwb thaiv tsev tsis ua haujlwm, cov khoom siv tiv thaiv hauv av yuav tsum muaj peev xwm tiv taus qhov txhaum tam sim no, uas yog, thaum lub rwb thaiv tsev tsis zoo, cov khoom siv tsis tuaj yeem ua cov khoom siv hluav taws xob.Cias muab, cov cuab yeej siv nrog tus pin grounding ntawm lub hwj chim qaum yog cov khoom siv Class I.Cov cuab yeej siv Class II tsis tsuas yog tso siab rau "Basic Insulation" los tiv thaiv hluav taws xob, tab sis kuj tseem muaj lwm yam kev tiv thaiv kev nyab xeeb xws li "Ob chav rwb thaiv tsev" lossis "Rov thaiv hluav taws xob".Tsis muaj cov xwm txheej hais txog kev ntseeg tau ntawm kev tiv thaiv av lossis kev teeb tsa.
