AC / DC tiv thaiv qhov ntsuas hluav taws xob? Wuhan UHV tshwj xeeb hauv kev tsim khoomseries resonance, nrog ntau yam khoom xaiv thiab kev kuaj hluav taws xob. Nrhiavseries resonance, xaiv Wuhan UHV.
Nrog rau kev txhim kho kev paub txog kev nyab xeeb ntawm cov neeg siv khoom thiab kev saib xyuas ntau ntxiv ntawm cov tuam txhab rau cov khoom lag luam zoo, yuav luag txhua tus neeg tsim khoom yuav ntsuas kev nyab xeeb ntawm lawv cov khoom hauv cov khoom tsim thiab cov txheej txheem tsim khoom kom ntseeg tau qhov zoo thiab kev nyab xeeb ntawm lawv cov khoom. Ntawm ntau yam kev ntsuas kev nyab xeeb, tiv thaiv qhov ntsuas hluav taws xob yog qhov yooj yim tshaj plaws thiab feem ntau siv cov qauv ntsuas. Raws li cov kev cai sib txawv ntawm cov khoom siv hluav taws xob sib txawv, kev ntsuas hluav taws xob siab dua li kev ua haujlwm ib txwm siv rau cov khoom lag luam thiab kuaj rau lub sijhawm. Yog hais tias qhov hluav taws xob tam sim no ntawm cov khoom kuaj ntsuas tseem nyob hauv qhov kev nyab xeeb nyob rau hauv lub sijhawm teev tseg, nws tuaj yeem txiav txim siab tias cov khoom siv tau ua haujlwm zoo nyob rau hauv ib txwm muaj. Cov txheej txheem no hu ua voltage withstand test.
Muaj ntau ntau hom kev ntsuas hluav taws xob tiv thaiv:
(1) Thaum lub sij hawm tsim cov txheej txheem ntawm cov khoom, ib tug functional withstand voltage test yog ua los xyuas kom meej tias cov khoom muaj peev xwm ua tiav nws lub hom phiaj siv functionality;
(2) Hauv cov txheej txheem tsim khoom, kom ntseeg tau tias cov khoom tuaj yeem ua tau raws li cov qauv tsim, kev ntsuas siab ua tiav;
(3) Thaum lub sij hawm soj ntsuam cov khoom, ib tug voltage withstand test yog ua los xyuas kom meej tias cov khoom zoo raws li cov qauv kev nyab xeeb;
(4) Tom qab kev saib xyuas cov khoom, nws tuaj yeem tswj tau qhov kev nyab xeeb thiab qhov hluav taws xob tiv thaiv kev ntsuas uas ua tau raws li cov cai thiab cov qauv kev nyab xeeb.
Tus qauv ntsuas hluav taws xob tiv thaiv qhov ntsuas hluav taws xob (qee zaum kuj hu ua "high-voltage dielectric testing") yog teem rau ob zaug ntawm qhov kev khiav hauj lwm voltage ntawm cov khoom kuaj ntxiv rau 1000V. Txawm li cas los xij, qee cov khoom siv nrog "ob chav rwb thaiv tsev" tsim kuj tseem muaj qhov ntsuas hluav taws xob siab dua li cov qauv hluav taws xob saum toj no. Nws qhov ua haujlwm voltage ntau yog (100-240) V, thiab qhov ntsuas hluav taws xob tiv thaiv hluav taws xob rau cov khoom siv no yuav nyob nruab nrab ntawm (1000-4000) V lossis siab dua. Cov zis hluav taws xob ntawm qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas hluav taws xob yuav tsum tau khaws cia nyob rau hauv thaj tsam ntawm (100-120)% ntawm qhov ntsuas qhov ntsuas qhov ntsuas, thiab yuav tsum tau kho tsis tu ncua. Cov zis ntau zaus ntawm AC voltage withstand tester yog nruab nrab ntawm (40 ~ 70) Hz, thiab lub ncov tus nqi ntawm qhov ntsuas hluav taws xob nthwv dej yog (1.3 ~ 1.5) npaug ntawm lub hauv paus txhais tau tias square (RMS) voltage tus nqi. Cov khoom tiv thaiv qhov ntsuas hluav taws xob yuav tsum tuaj yeem kuaj xyuas cov khoom tsis xws luag: lub zog rwb thaiv tsev ntawm cov khoom siv rwb thaiv tsev tsis muaj zog heev; Qhov kev ncua deb ntawm cov khoom yog ze heev, ua rau txo qis ntawm rwb thaiv tsev zog; Muaj pinholes, npuas, los yog deformation tshwm sim los ntawm compression ntawm lub insulator.
Ua ntej ua qhov ntsuas qhov ntsuas hluav taws xob, nws yog qhov yuav tsum tau ua ntej kom paub meej tias qhov ntsuas hluav taws xob twg yuav tsum tau siv rau cov khoom. Feem ntau ntawm cov khoom tsuas yog tso cai rau lees txais ib qho ntawm kev ntsuas qhov ntsuas hluav taws xob, DC voltage lossis AC voltage, thaum qee cov khoom tuaj yeem lees txais AC thiab DC voltage tiv thaiv kev ntsuas hluav taws xob ib txhij. Tus neeg teb xov tooj yuav tsum txiav txim siab seb qhov hluav taws xob tiv thaiv kev sim siv li cas raws li qhov xwm txheej tiag tiag. Txhawm rau kom ntseeg tau tias cov khoom kuaj tau ua tau raws li cov cai tswj kev nyab xeeb, cov neeg siv yuav tsum muaj kev nkag siab txog qhov zoo thiab qhov tsis zoo ntawm DC tiv thaiv qhov ntsuas hluav taws xob thiab AC tiv thaiv qhov ntsuas hluav taws xob.
Qhov zoo ntawm kev sib txuas lus Voltage Test
Feem ntau, cov neeg siv tau txais ntau dua rau AC tiv thaiv qhov ntsuas hluav taws xob vim tias feem ntau cov khoom siv AC fais fab mov. AC tiv taus qhov ntsuas hluav taws xob tuaj yeem sim ib txhij kuaj qhov zoo thiab qhov tsis zoo ntawm cov khoom, uas yog raws li qhov tseeb daim ntawv thov ib puag ncig ntawm cov khoom. Feem ntau ntawm cov khoom kuaj sim muaj qee cov kab hluav taws xob tsis zoo, uas tsis tuaj yeem saturated tam sim ntawd thaum AC tiv thaiv qhov ntsuas hluav taws xob. Cov tam sim no ntws los ntawm cov stray capacitors yuav kav ib lub sij hawm ntawm lub sij hawm yam tsis tau ua instantaneous surge tam sim no, thiab tsis tas yuav maj mam nce qhov ntsuas voltage. Yog tias cov khoom no tsis tshua muaj kev cuam tshuam rau qhov hluav taws xob hluav taws xob, qhov ntsuas hluav taws xob ntau dua tuaj yeem siv thaum pib ntawm qhov kev sim. Tom qab qhov ntsuas qhov ntsuas hluav taws xob, tsis tas yuav tso tawm cov khoom kuaj, uas ua kom zoo dua qhov kev sim.
Disadvantages ntawm kev sib txuas lus Voltage Test
Yog hais tias cov khoom kuaj yog ib tug capacitive load los yog muaj loj stray capacitance, qhov tam sim no generated los ntawm lub withstand voltage test yuav ntau dua li qhov tseeb to tam sim no, yog li qhov tseeb leakage tam sim no tus nqi ntawm cov khoom kuaj yuav tsis tau. Qhov tseeb tso zis tam sim no tus nqi ntawm qhov ntsuas qhov ntsuas hluav taws xob yuav loj dua li ntawm DC tiv thaiv qhov ntsuas hluav taws xob, uas yuav ua rau muaj kev pheej hmoo ntawm hluav taws xob poob siab rau cov neeg ua haujlwm.
Qhov zoo ntawm DC withstand voltage test
Vim tias qhov kev them nyiaj ceev ceev ntawm qhov tsis txaus ntseeg ntawm cov khoom kuaj thaum lub sij hawm DC tiv thaiv qhov ntsuas hluav taws xob, lub capacitive tam sim no generated thaum lub sij hawm kuaj cov txheej txheem yuav sai sai txo mus rau zero tom qab lub stray capacitance yog tag nrho them. Nyob rau ntawm lub sijhawm no, tsuas yog qhov hluav taws xob tam sim no ntawm cov khoom kuaj tseem tshuav, qhia tias DC tiv thaiv qhov ntsuas hluav taws xob tuaj yeem cuam tshuam qhov tseeb qhov hluav taws xob tam sim no ntawm cov khoom kuaj. Tsis tas li ntawd, vim lub fact tias tsuas yog lub them tam sim no ntawm cov khoom kuaj yuav tsum tau muab nyob rau hauv ib tug luv luv lub sij hawm ntawm lub sij hawm, thiab yuav luag tsis muaj tam sim no muab nyob rau hauv tag nrho lub sij hawm, lub peev xwm tam sim no yuav tsum tau rau DC withstand voltage xeem yog qis dua qhov yuav tsum tau rau AC withstand voltage xeem. Qhov no tuaj yeem txo tus nqi ntawm cov cuab yeej ntsuas thiab txhim kho kev nyab xeeb ntawm cov neeg ua haujlwm.
Disadvantages ntawm DC withstand voltage xeem
Vim tias muaj qhov tsis txaus ntseeg hauv cov khoom siv kuaj, txhawm rau kom tsis txhob muaj kev nce nqi tam sim no, DC tiv thaiv qhov ntsuas hluav taws xob yuav tsum pib ntawm "zero" thiab maj mam nce. Qhov loj dua qhov muaj peev xwm tsis txaus ntseeg ntawm cov khoom kuaj, qhov ntev dua qhov yuav tsum tau nce lub sij hawm ntawm qhov ntsuas hluav taws xob. Tsis tas li ntawd, kev them nyiaj ntau dhau los ntawm qhov tsis txaus ntseeg tuaj yeem ua rau kev txiav txim siab tsis raug ntawm qhov ntsuas ntsuas, ua rau cov txiaj ntsig tsis zoo. Cov txheej txheem ntawm DC tiv thaiv qhov ntsuas hluav taws xob tuaj yeem ua rau tsis muaj peev xwm ntawm cov khoom kuaj los tsim cov nqi thiab nqa hluav taws xob zoo li qub. Txhawm rau kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm, cov khoom kuaj yuav tsum tau muab tso rau hauv av thiab tso tawm tom qab qhov kev xeem tiav. Tsis tas li ntawd, DC tiv thaiv qhov ntsuas hluav taws xob sib txawv ntawm AC tiv thaiv qhov ntsuas hluav taws xob nyob rau hauv uas nws tsuas tuaj yeem sim ib qho polarity xwb. Yog tias cov khoom kuaj tau siv nyob rau hauv AC voltage, qhov tsis zoo ntawm DC tiv thaiv qhov ntsuas hluav taws xob yuav tsum raug txiav txim siab. Tus nqi siab tshaj ntawm qhov ntsuas qhov tseeb ntawm qhov ntsuas hluav taws xob hauv AC tiv thaiv qhov ntsuas hluav taws xob yog ob peb zaug ntawm tus nqi tso tawm ntawm qhov ntsuas. Feem ntau, qhov ntsuas ntsuas tsis tuaj yeem tso saib tus nqi siab kawg no, thiab DC tiv thaiv qhov ntsuas hluav taws xob tsis tuaj yeem ua tiav. Yog li yog tias siv DC tiv thaiv qhov ntsuas hluav taws xob, qhov ntsuas hluav taws xob yuav tsum tau nce ntxiv rau tus nqi sib xws.
Hauv cov ntsiab lus, kev xaiv kom raug ntawm AC thiab DC tuaj yeem tiv taus qhov ntsuas hluav taws xob tsis tuaj yeem tsuas yog tau txais cov ntaub ntawv ntsuas tiag tiag thiab ua haujlwm tau zoo, txhim kho kev ntsuas qhov tseeb, tab sis kuj txo cov nqi ntsuas, txhim kho kev ntsuas kev ua tau zoo, thiab muab kev pabcuam zoo rau cov neeg siv.