Disadvantages of Direct Current (DC) Testing
(1) Tshwj tsis yog tias tsis muaj lub peev xwm ntawm cov khoom ntsuas, qhov ntsuas hluav taws xob yuav tsum pib ntawm "zero" thiab maj mam nce kom tsis txhob them tam sim no ntau dhau.Qhov ntxiv voltage kuj qis dua.Thaum cov nqi them tam sim no loj dhau lawm, nws yuav ua rau kev txiav txim siab tsis zoo los ntawm tus neeg ntsuas thiab ua rau qhov ntsuas tsis raug.
(2) Txij li thaum DC tiv thaiv qhov ntsuas hluav taws xob yuav them cov khoom nyob rau hauv kev sim, tom qab kev sim, cov khoom hauv kev sim yuav tsum raug tso tawm ua ntej mus rau cov kauj ruam tom ntej.
(3) Tsis zoo li qhov ntsuas AC, DC tiv thaiv qhov ntsuas hluav taws xob tsuas tuaj yeem sim nrog tib lub polarity.Yog tias cov khoom yuav tsum tau siv nyob rau hauv AC voltage, qhov tsis zoo no yuav tsum tau txiav txim siab.Qhov no kuj yog vim li cas vim li cas feem ntau cov neeg saib xyuas kev nyab xeeb pom zoo siv AC tiv thaiv qhov ntsuas hluav taws xob.
(4) Thaum lub sij hawm AC withstand voltage test, lub ncov tus nqi ntawm qhov voltage yog 1.4 npaug ntawm tus nqi tso tawm los ntawm lub ntsuas hluav taws xob, uas tsis tuaj yeem pom los ntawm lub ntsuas hluav taws xob, thiab tseem tsis tuaj yeem ua tiav los ntawm DC tiv thaiv qhov ntsuas hluav taws xob.Yog li ntawd, feem ntau txoj cai kev nyab xeeb yuav tsum tau siv yog tias DC tiv thaiv qhov ntsuas hluav taws xob, qhov ntsuas hluav taws xob yuav tsum tau nce mus rau qhov sib npaug.
Tom qab DC tiv thaiv qhov ntsuas hluav taws xob ua tiav, yog tias cov khoom nyob rau hauv qhov ntsuas tsis tau tawm, nws yooj yim ua rau hluav taws xob poob rau tus neeg teb xov tooj;tag nrho peb cov DC tiv taus cov ntsuas hluav taws xob muaj qhov tso tawm sai ntawm 0.2s.Tom qab DC tiv thaiv qhov ntsuas hluav taws xob ua tiav, tus ntsuas ntsuas nws tuaj yeem tso tawm hluav taws xob ntawm lub cev kuaj hauv 0.2s los tiv thaiv kev nyab xeeb ntawm tus neeg teb xov tooj.
Taw qhia txog qhov zoo thiab qhov tsis zoo ntawm AC tiv thaiv qhov ntsuas hluav taws xob
Thaum lub sij hawm ntsuas qhov ntsuas hluav taws xob, qhov hluav taws xob siv los ntawm tus ntsuas hluav taws xob tiv thaiv rau lub cev ntsuas tau txiav txim siab raws li hauv qab no: muab qhov ua haujlwm voltage ntawm lub cev kuaj los ntawm 2 thiab ntxiv 1000V.Piv txwv li, qhov ua haujlwm voltage ntawm cov khoom kuaj yog 220V, thaum qhov ntsuas qhov ntsuas hluav taws xob tau ua tiav, qhov hluav taws xob ntawm qhov ntsuas hluav taws xob tiv thaiv yog 220V + 1000V = 1440V, feem ntau 1500V.
Qhov ntsuas hluav taws xob tiv thaiv tau muab faib ua AC withstand voltage test thiab DC withstand voltage test;Qhov zoo thiab qhov tsis zoo ntawm AC withstand voltage test yog raws li nram no:
Qhov zoo ntawm AC withstand voltage test:
(1) Feem ntau hais lus, AC xeem tau yooj yim dua los ntawm chav kuaj kev nyab xeeb dua li qhov ntsuas DC.Lub ntsiab yog vim li cas feem ntau ntawm cov khoom siv alternating tam sim no, thiab alternating tam sim no xeem yuav kuaj qhov zoo thiab tsis zoo polarity ntawm cov khoom nyob rau tib lub sij hawm, uas yog tag nrho raws li ib puag ncig nyob rau hauv uas cov khoom siv thiab nyob rau hauv kab. nrog rau qhov kev siv tiag tiag.
(2) Txij li thaum cov stray capacitors tsis tuaj yeem them tag nrho thaum lub sijhawm kuaj AC, tab sis yuav tsis muaj tam sim no inrush tam sim no, yog li tsis tas yuav cia qhov ntsuas hluav taws xob nce qeeb, thiab qhov hluav taws xob tag nrho tuaj yeem ntxiv rau thaum pib ntawm lub kuaj, tshwj tsis yog cov khoom yog rhiab heev rau inrush voltage rhiab heev.
(3) Vim tias qhov kev xeem AC tsis tuaj yeem ua rau cov neeg tsis muaj zog, tsis tas yuav tso cov khoom kuaj tom qab qhov kev sim, uas yog lwm qhov zoo dua.
Disadvantages ntawm AC withstand voltage xeem:
(1) Lub ntsiab qhov tsis zoo yog tias yog tias qhov tsis txaus ntseeg ntawm cov khoom ntsuas yog qhov loj lossis cov khoom ntsuas yog lub peev xwm thauj khoom, cov khoom tsim tawm tam sim no yuav loj dua li qhov tseeb to tam sim no, yog li tsis tuaj yeem paub qhov tseeb tam sim no.tam sim no.
(2) Lwm qhov tsis zoo yog vim tias qhov tam sim no xav tau los ntawm qhov tsis txaus ntseeg ntawm cov khoom kuaj yuav tsum tau muab, cov zis tam sim no los ntawm lub tshuab yuav loj dua li qhov tam sim no thaum siv DC kuaj.Qhov no ua rau muaj kev pheej hmoo ntxiv rau tus neeg teb xov tooj.
Puas muaj qhov sib txawv ntawm qhov ntsuas arc thiab ntsuas tam sim no?
1. Hais txog kev siv arc nrhiav pom muaj nuj nqi (ARC).
a.Arc yog ib qho tshwm sim ntawm lub cev, tshwj xeeb tshaj yog qhov muaj zog hluav taws xob siab.
b.Cov xwm txheej ntau lawm: kev cuam tshuam ib puag ncig, kev cuam tshuam cov txheej txheem, cov khoom siv cuam tshuam.
c.Arc muaj kev txhawj xeeb ntau dua los ntawm txhua tus, thiab nws kuj yog ib qho tseem ceeb rau kev ntsuas cov khoom zoo.
d.RK99 series program-tswj tiv thaiv hluav taws xob ntsuas hluav taws xob tsim los ntawm peb lub tuam txhab muaj kev ua haujlwm ntawm kev tshawb pom arc.Nws ua piv txwv cov teeb liab mem tes siab tshaj 10KHz los ntawm kev lim dej siab nrog cov lus teb zaus saum 10KHz, thiab tom qab ntawd muab piv nrog cov ntsuas ntsuas ntsuas los txiav txim seb nws puas tsim nyog.Daim ntawv tam sim no tuaj yeem teeb tsa, thiab daim ntawv qib kuj tuaj yeem teeb tsa.
e.Yuav ua li cas xaiv qhov rhiab heev theem yuav tsum tau teem los ntawm tus neeg siv raws li cov khoom yam ntxwv thiab yuav tsum tau.
Post lub sij hawm: Oct-19-2022
