A:Ili ndi funso lomwe opanga zinthu ambiri amafuna kufunsa, ndipo yankho lodziwika bwino ndi "chifukwa mulingo wachitetezo umanena."Ngati mungamvetse mozama maziko a malamulo otetezera magetsi, mudzapeza udindo kumbuyo kwake.ndi tanthauzo.Ngakhale kuyesa chitetezo chamagetsi kumatenga nthawi pang'ono pamzere wopanga, kumakupatsani mwayi wochepetsera chiwopsezo chobwezeretsanso zinthu chifukwa cha zoopsa zamagetsi.Kuzikonza koyamba ndi njira yoyenera yochepetsera ndalama komanso kukhala ndi chidwi.
A:Kuyesa kuwonongeka kwamagetsi kumagawidwa m'mitundu inayi: Dielectric Withstand / Hipot Test: Kuyesa kwamagetsi kumagwiritsa ntchito voteji yayikulu pamagetsi ndi mabwalo apansi a chinthucho ndikuyesa kusweka kwake.Isolation Resistance Test: yesani momwe magetsi amakhalira.Mayeso a Leakage Current: Dziwani ngati kutayikira kwa magetsi a AC/DC ku terminal yapansi kupitilira muyezo.Malo Oteteza: Yesani ngati zitsulo zofikirika zili zokhazikika bwino.
A: Pachitetezo cha oyesa opanga kapena ma labotale oyesera, zakhala zikuchitika ku Europe kwa zaka zambiri.Kaya ndi opanga ndi oyesa zida zamagetsi, zida zaukadaulo wazidziwitso, zida zapakhomo, zida zamakina kapena zida zina, m'malamulo osiyanasiyana achitetezo Pali mitu m'malamulo, kaya ndi UL, IEC, EN, yomwe imaphatikizapo kuyika chizindikiro (ogwira ntchito) malo, malo a zida, malo a DUT), zida zoyika chizindikiro (zodziwika bwino "zowopsa" kapena zinthu zomwe zikuyesedwa), malo oyambira zida zogwirira ntchito ndi zida zina zofananira, komanso mphamvu yamagetsi yamagetsi pazida zilizonse zoyesera (IEC 61010).
A: Kupirira kuyesedwa kwamagetsi kapena kuyesa kwamagetsi apamwamba (HIPOT test) ndi 100% muyezo womwe umagwiritsidwa ntchito kutsimikizira zamtundu ndi chitetezo chamagetsi pazinthu (monga zomwe zimafunidwa ndi JSI, CSA, BSI, UL, IEC, TUV, etc. mabungwe achitetezo) Ndilonso lodziwika bwino kwambiri komanso loyesa chitetezo pama mzere wopangidwa pafupipafupi.Mayeso a HIPOT ndi mayeso osawononga kuti adziwe kuti zida zotchingira magetsi zimalimbana mokwanira ndi ma voltages apamwamba akanthawi, ndipo ndi mayeso othamanga kwambiri omwe amagwiritsidwa ntchito pazida zonse kuwonetsetsa kuti zotchingirazo ndizokwanira.Zifukwa zina zoyeserera za HIPOT ndikuti zimatha kuzindikira zolakwika zomwe zingatheke monga mtunda wosakwanira wa creepage ndi zilolezo zomwe zimachitika panthawi yopanga.
A: Nthawi zambiri, mawonekedwe amagetsi mumagetsi amagetsi ndi sine wave.Panthawi yogwiritsira ntchito mphamvu, chifukwa cha kugunda kwa mphezi, ntchito, zolakwika kapena zosayenera chizindikiro chofananira ndi zipangizo zamagetsi, voteji ya mbali zina za dongosolo imakwera mwadzidzidzi ndipo imaposa mphamvu zake zovotera, zomwe zimakhala zowonjezereka.Overvoltage ikhoza kugawidwa m'magulu awiri malinga ndi zomwe zimayambitsa.Imodzi ndi kuchulukirachulukira komwe kumachitika chifukwa cha kugunda kwamphezi kapena kulowetsedwa kwa mphezi, komwe kumatchedwa kuchulukitsa kwamagetsi.Kukula kwa mphamvu yamagetsi yamagetsi ndi mphamvu yamagetsi ndi yayikulu, ndipo nthawi yake ndi yaifupi kwambiri, yomwe imawononga kwambiri.Komabe, chifukwa mizere ya 3-10kV ndi pansi m'matauni ndi mabizinesi wamba amatetezedwa ndi malo ochitirako misonkhano kapena nyumba zazitali, mwayi wowomberedwa mwachindunji ndi mphezi ndi wochepa kwambiri, womwe ndi wotetezeka.Komanso, zomwe zikukambidwa pano ndi zida zamagetsi zapakhomo, zomwe sizili m'gulu lomwe tafotokozazi, ndipo sizidzakambidwanso.Mtundu winawo umayamba chifukwa cha kutembenuka kwa mphamvu kapena kusintha kwa magawo mkati mwa mphamvu yamagetsi, monga kuyika mzere wosanyamula katundu, kudula thiransifoma yopanda katundu, ndi kuyika kwa arc gawo limodzi mu dongosolo, lomwe limatchedwa kuwonjezereka kwapakati.Internal overvoltage ndiye maziko chachikulu chodziwira yachibadwa kutchinjiriza mlingo wa zipangizo zosiyanasiyana magetsi mu dongosolo mphamvu.Ndiko kunena kuti, kapangidwe ka kamangidwe kazinthu zotchinjiriza kuyenera kuganizira osati mphamvu yamagetsi yokhayo komanso kuchulukira kwamkati kwa chilengedwe chogwiritsidwa ntchito.Kuyesa kwamphamvu kwamagetsi ndikowona ngati mawonekedwe otsekemera azinthu amatha kupirira kuchulukira kwamkati kwamagetsi.
A: Nthawi zambiri kuyesa kwa magetsi kwa AC ndikovomerezeka kwa mabungwe achitetezo kuposa ma DC omwe amapirira mayeso amagetsi.Chifukwa chachikulu ndichakuti zinthu zambiri zomwe zikuyesedwa zizigwira ntchito pansi pa voltage ya AC, ndipo kuyesa kwamagetsi kwa AC kumapereka mwayi wosinthana ndi ma polarities awiri kuti atsindike kutsekereza, komwe kuli pafupi ndi kupsinjika komwe mankhwalawa angakumane nawo pakugwiritsa ntchito.Popeza kuyesa kwa AC sikulipiritsa katundu wa capacitive, kuwerenga kwapano kumakhalabe kofanana kuyambira koyambira kugwiritsa ntchito magetsi mpaka kumapeto kwa mayeso.Chifukwa chake, palibe chifukwa chowonjezera mphamvu yamagetsi chifukwa palibe zovuta zokhazikika zomwe zimafunikira kuyang'anira zomwe zikuwerengedwa.Izi zikutanthauza kuti pokhapokha ngati chinthu chomwe chikuyesedwa chikuwona mphamvu yamagetsi yomwe yagwiritsidwa ntchito mwadzidzidzi, wogwiritsa ntchito amatha kugwiritsa ntchito mphamvu zonse ndikuwerenga zomwe zikuchitika popanda kudikirira.Popeza magetsi a AC salipiritsa katunduyo, palibe chifukwa chochotsera chipangizochi poyesedwa pambuyo poyesedwa.
A: Poyesa katundu wa capacitive, zonse zomwe zilipo zimakhala ndi mafunde othamanga komanso otuluka.Kuchulukira kwa mphamvu yaposachedwa kukakhala kokulirapo kuposa kutayikira kowona, zitha kukhala zovuta kuzindikira zinthu zomwe zikuchulukirachulukira.Poyesa katundu wamkulu wa capacitive, zonse zomwe zimafunikira pano ndizokulirapo kuposa zomwe zimatuluka panokha.Izi zitha kukhala zoopsa kwambiri chifukwa wogwiritsa ntchito amakumana ndi mafunde apamwamba
A: Chida choyesedwa (DUT) chikayimitsidwa kwathunthu, ndikutuluka kowona komwe kumatuluka.Izi zimathandiza DC Hipot Tester kuwonetsa momveka bwino kutayikira kowona kwa zinthu zomwe zikuyesedwa.Chifukwa chanthawi yochapira ndi yanthawi yayitali, mphamvu zoyezera magetsi za DC zimatha kukhala zocheperako poyerekeza ndi zomwe zimagwiritsidwa ntchito poyesa chinthu chomwecho.
Yankho: Popeza kuti DC yopirira mayeso amagetsi imalipira DUT, kuti athetse chiwopsezo cha kugwedezeka kwamagetsi kwa woyendetsa DUT pambuyo poyesa kupirira, DUT iyenera kutulutsidwa pambuyo pa mayeso.Mayeso a DC amalipira capacitor.Ngati DUT imagwiritsa ntchito mphamvu ya AC, njira ya DC simatengera momwe zinthu zilili.
A: Pali mitundu iwiri ya mayeso opirira ma voltage: AC test test voltage ndi DC test test voltage.Chifukwa cha mawonekedwe a zida zotsekera, njira zowonongeka za AC ndi DC ma voltages ndizosiyana.Zida zambiri zotchingira ndi makina zimakhala ndi mitundu yosiyanasiyana ya media.Mphamvu yoyeserera ya AC ikagwiritsidwa ntchito, magetsiwo amagawidwa molingana ndi magawo monga dielectric pafupipafupi komanso kukula kwazinthuzo.Pomwe magetsi a DC amangogawa magetsi molingana ndi kukana kwa zinthuzo.Ndipo kwenikweni, kuwonongeka kwa mapangidwe otetezera nthawi zambiri kumayambitsidwa ndi kuwonongeka kwa magetsi, kuwonongeka kwa kutentha, kutulutsa ndi mitundu ina panthawi imodzimodzi, ndipo zimakhala zovuta kuzilekanitsa kwathunthu.Ndipo magetsi a AC amawonjezera kuthekera kwa kuwonongeka kwamafuta pamagetsi a DC.Chifukwa chake, timakhulupirira kuti kuyesa kwamagetsi kwa AC ndikovuta kwambiri kuposa kuyesa kwamagetsi kwa DC.Pogwira ntchito, poyesa kupirira voteji, ngati DC ikugwiritsidwa ntchito poyesa kupirira voteji, voteji yoyezetsa imayenera kukhala yoposa mphamvu yoyesera ya ma frequency amagetsi a AC.Magetsi oyeserera a general DC standstand voltage test amachulukitsidwa ndi K mosalekeza ndi phindu la voteji yoyeserera ya AC.Kupyolera mu mayesero ofananitsa, tili ndi zotsatirazi: pazinthu za waya ndi zingwe, zokhazikika K ndi 3;kwa makampani oyendetsa ndege, K wokhazikika ndi 1.6 mpaka 1.7;CSA nthawi zambiri imagwiritsa ntchito 1.414 pazinthu za anthu wamba.
A: Magetsi oyezetsa omwe amatsimikizira kupirira kwa magetsi amadalira msika womwe katundu wanu adzayikidwe, ndipo muyenera kutsatira mfundo zachitetezo kapena malamulo omwe ali mbali ya malamulo oyendetsera dzikolo.Magetsi oyesera ndi nthawi yoyesera ya test voltage test amafotokozedwa muchitetezo chachitetezo.Nthawi yabwino ndikufunsa kasitomala wanu kuti akupatseni zofunikira zoyezetsa.Magetsi oyeserera a test test voltage general ndi motere: ngati voteji yogwira ntchito ili pakati pa 42V ndi 1000V, voliyumu yoyeserera ndiyowirikiza kawiri voteji yogwira ntchito kuphatikiza 1000V.Mphamvu yamagetsi iyi imayikidwa kwa mphindi imodzi.Mwachitsanzo, pa chinthu chomwe chimagwira ntchito pa 230V, mphamvu yoyesera ndi 1460V.Ngati nthawi yogwiritsira ntchito voteji yafupikitsidwa, voteji yoyesera iyenera kuwonjezeka.Mwachitsanzo, miyeso yoyeserera mu UL 935:
| chikhalidwe | Nthawi yofunsira (masekondi) | magetsi ogwiritsidwa ntchito |
| A | 60 | 1000V + (2 x V) |
| B | 1 | 1200V + (2.4 x V) |
| V=magetsi okwera kwambiri | ||
A: Kuchuluka kwa Hipot Tester kumatanthawuza kutulutsa kwake mphamvu.Kuchuluka kwa tester voltage tester kumatsimikiziridwa ndi kuchuluka komwe kumachokera pakalipano x kuchuluka kwa voliyumu yotulutsa.Mwachitsanzo:5000Vx100mA=500VA
A: Kusokera kwa chinthu choyesedwa ndicho chifukwa chachikulu cha kusiyana pakati pa miyeso ya AC ndi DC kupirira mayeso amagetsi.Ma capacitances osokerawa sangaperekedwe mokwanira poyesa ndi AC, ndipo padzakhala pompopompo mosalekeza ikuyenda kudzera mu mphamvu zosokerazi.Ndi mayeso a DC, mphamvu yosokera pa DUT ikangotha, chotsalira ndi kutayikira kwenikweni kwa DUT.Chifukwa chake, kutsika kwaposachedwa komwe kumayesedwa ndi kuyesa kwa AC kupirira ndi kuyesa kwamagetsi kwa DC kudzakhala kosiyana.
A: Ma insulators sakhala oyendetsa, koma kwenikweni pafupifupi palibe zotchingira zomwe sizimayendetsa.Pazinthu zilizonse zotsekera, magetsi akagwiritsidwa ntchito modutsa, magetsi ena amadutsa nthawi zonse.Chigawo chogwira ntchito chamakonochi chimatchedwa leakage current, ndipo chodabwitsachi chimatchedwanso kutayikira kwa insulator.Poyesa zida zamagetsi, kutayikira kwapano kumatanthawuza komwe kumapangidwa ndi sing'anga yozungulira kapena malo otchingira pakati pazigawo zachitsulo zokhala ndi zotsekereza, kapena pakati pazigawo zamoyo ndi zozikika popanda mphamvu yamagetsi.ndi leakage current.Malinga ndi muyezo wa US UL, kutayikira kwapano ndi komwe kumatha kuyendetsedwa kuchokera ku zida zopezeka m'nyumba, kuphatikiza mafunde olumikizana mwamphamvu.Kutayikira kwapano kumaphatikizapo magawo awiri, gawo limodzi ndi conduction pano I1 kudzera pakukaniza kutchinjiriza;gawo lina ndi kusamutsidwa panopa I2 kudzera capacitance anagawira, yotsirizira capacitive reactance ndi XC = 1/2pfc ndipo inversely molingana ndi mafupipafupi magetsi, ndi anagawira capacitance panopa akuwonjezeka ndi pafupipafupi.kuwonjezeka, kotero kutayikira panopa kumawonjezeka ndi mafupipafupi a magetsi.Mwachitsanzo: pogwiritsa ntchito thyristor kwa magetsi, zigawo zake za harmonic zimawonjezera kutayikira panopa.
A: Kupirira kuyesedwa kwa voteji ndikuzindikira kutayikira komwe kukuyenda kudzera mu njira yotchinjiriza ya chinthu chomwe chikuyesedwa, ndikugwiritsa ntchito voteji yapamwamba kuposa voteji yogwira ntchito pamagetsi otsekemera;pamene mphamvu kutayikira panopa (kukhudzana panopa) ndi kuti azindikire kutayikira panopa chinthu pansi kuyesedwa pansi ntchito yachibadwa.Yezerani kutayikira kwaposachedwa kwa chinthu choyezedwa pansi pazovuta kwambiri (voltage, frequency).Mwachidule, kutayikira kwaposachedwa kwa test test voltage ndi kutayikira komwe kumayesedwa popanda mphamvu yogwira ntchito, ndipo mphamvu yotuluka (yolumikizana ndi pano) ndiyo kutayikira komwe kumayezedwa pansi pa ntchito yabwinobwino.
A: Pazinthu zamagetsi zamapangidwe osiyanasiyana, kuyeza kwa kukhudza kwapano kulinso ndi zofunikira zosiyanasiyana, koma nthawi zambiri, kukhudza kwapano kumatha kugawidwa m'malo olumikizirana ndi Ground Leakage Current, kukhudzana kwapamtunda kwa Surface mpaka Line Leakage Current ndi pamwamba. -to-line Leakage Current Three touch pano Pamwamba pa Surface Leakage Current test
A: Zigawo zazitsulo zofikirika kapena zotsekera zamagetsi a zida za Class I ziyeneranso kukhala zozungulira bwino ngati njira yodzitetezera ku kugwedezeka kwamagetsi kupatula kutsekereza koyambira.Komabe, nthawi zambiri timakumana ndi ogwiritsa ntchito omwe amangogwiritsa ntchito zida za Class I monga zida za Class II, kapena kutulutsa mwachindunji poyambira pansi (GND) kumapeto kwa magetsi a zida za Class I, kotero pamakhala zoopsa zina zachitetezo.Ngakhale zili choncho, ndi udindo wa wopanga kupewa ngozi kwa wogwiritsa ntchito chifukwa cha izi.Ichi ndichifukwa chake kuyesa kwaposachedwa kwakhudza kuchitidwa.
A: Pa AC test test voltage, palibe muyezo chifukwa cha mitundu yosiyanasiyana ya zinthu zoyesedwa, kukhalapo kwa mphamvu zosokera muzinthu zoyesedwa, ndi ma voltages osiyanasiyana, kotero palibe muyezo.
A: Njira yabwino yodziwira voteji yoyeserera ndikuyiyika molingana ndi zomwe zimafunikira pakuyesa.Nthawi zambiri, tidzayika voteji yoyeserera molingana ndi 2 nthawi yamagetsi yogwira ntchito kuphatikiza 1000V.Mwachitsanzo, ngati voteji yogwira ntchito ya chinthu ndi 115VAC, timagwiritsa ntchito 2 x 115 + 1000 = 1230 Volt ngati mphamvu yoyesera.Zachidziwikire, voteji yoyeserera idzakhalanso ndi zosintha zosiyanasiyana chifukwa chamitundu yosiyanasiyana ya zigawo zoteteza.
A: Mawu atatuwa onse ali ndi tanthauzo lofanana, koma nthawi zambiri amagwiritsidwa ntchito mosinthana poyesa mayeso.
A: Kuyesa kwa insulation resistance ndi test test voltage ndizofanana kwambiri.Ikani magetsi a DC mpaka 1000V ku mfundo ziwiri zomwe zikuyenera kuyesedwa.Mayeso a IR nthawi zambiri amapereka kukana kwa ma megohms, osati kuyimira Pass/Fail kuchokera ku mayeso a Hipot.Nthawi zambiri, voteji yoyeserera ndi 500V DC, ndipo mtengo wa insulation resistance (IR) suyenera kuchepera ma megohms ochepa.Kuyesa kukana kwa insulation ndi kuyesa kosawononga ndipo kumatha kudziwa ngati kusungunula kuli bwino.M'matchulidwe ena, kuyezetsa kukana kwa insulation kumachitika koyamba kenako kuyesa kwa voltage.Pamene kuyesa kwa insulation kulephera, kuyesa kwa voltage test nthawi zambiri kumalephera.
A: Mayeso olumikizirana pansi, anthu ena amachitcha kuti kuyesa kopitilira muyeso (Ground Continuity), amayesa kutsekeka pakati pa rack ya DUT ndi positi yapansi.Mayeso apansi amatsimikizira ngati chitetezo cha DUT chingathe kuthana ndi vutolo ngati katunduyo walephera.Woyesa pansi adzapanga kuchuluka kwa 30A DC pakadali pano kapena AC rms pano (CSA imafuna muyeso wa 40A) kudzera mudera lapansi kuti adziwe kutsekeka kwa dera lapansi, lomwe nthawi zambiri limakhala pansi pa 0.1 ohms.
A: Kuyesa kwa IR ndi kuyesa kwabwino komwe kumapereka chizindikiritso cha mtundu wamtundu wa insurance system.Nthawi zambiri amayesedwa ndi magetsi a DC a 500V kapena 1000V, ndipo zotsatira zake zimayesedwa ndi kukana kwa megohm.Kuyesa kwamagetsi kumagwiritsanso ntchito magetsi okwera kwambiri pa chipangizo chomwe chikuyesedwa (DUT), koma magetsi ogwiritsidwa ntchito ndi apamwamba kuposa mayeso a IR.Itha kuchitika pamagetsi a AC kapena DC.Zotsatira zimayesedwa mu milliamp kapena ma microamp.Mwa zina, kuyesa kwa IR kumachitika koyamba, ndikutsatiridwa ndi kuyesa kwamagetsi.Ngati chipangizo chomwe chikuyesedwa (DUT) chikulephera kuyesa IR, chipangizo chomwe chikuyesedwa (DUT) chimalepheranso kuyesa kupirira voteji pamagetsi okwera kwambiri.
A: Cholinga cha mayeso oletsa kuyika pansi ndikuwonetsetsa kuti waya woyikira pansi amatha kupirira kuthamanga kwanthawi yayitali kuti atsimikizire chitetezo cha ogwiritsa ntchito pakachitika vuto pazida.Mphamvu yamagetsi yoyesera yachitetezo imafuna kuti voteji yotseguka kwambiri sayenera kupitilira malire a 12V, kutengera malingaliro achitetezo a wogwiritsa ntchito.Kulephera kwa mayeso kukachitika, wogwiritsa ntchitoyo akhoza kuchepetsedwa kukhala pachiwopsezo cha kugwedezeka kwamagetsi.Muyezo wamba umafuna kuti kukana kwapansi kuyenera kukhala kochepera 0.1ohm.Ndibwino kuti mugwiritse ntchito kuyesa kwa AC panopa ndi mafupipafupi a 50Hz kapena 60Hz kuti mukwaniritse malo enieni ogwira ntchito.
A: Pali kusiyana pakati pa test test test voltage ndi kuyesa kutulutsa mphamvu, koma kawirikawiri, kusiyana kumeneku kungathe kufotokozedwa mwachidule motere.Kuyesa kwamagetsi ndikugwiritsa ntchito ma voliyumu apamwamba kukakamiza kusungunula kwa chinthucho kuti muwone ngati mphamvu yotchinjiriza ya chinthucho ndi yokwanira kuteteza kutayikira kwambiri.Kuyesa kwaposachedwa kwa kutayikira ndikuyesa kutayikira komwe kumadutsa muzogulitsa pansi pazabwinobwino komanso vuto limodzi lamagetsi pomwe chinthucho chikugwiritsidwa ntchito.
A: Kusiyana kwa nthawi yotulutsa kumadalira mphamvu ya chinthu choyesedwa ndi dera lotulutsa la tester voltage tester.Kuchuluka kwa capacitance, nthawi yayitali yotulutsa imafunika.
A: Zida za M'kalasi I zikutanthauza kuti magawo omwe akupezekapo amalumikizidwa ndi kondakitala woteteza pansi;pamene kutchinjiriza koyambira kulephera, woyendetsa zoteteza pansi ayenera kupirira vuto lapano, ndiye kuti, kusungunula koyambirira kukakanika, magawo ofikirika sangakhale mbali zamagetsi zamagetsi.Mwachidule, zida zomwe zili ndi pini yoyambira ya chingwe chamagetsi ndi zida za Class I.Zida za Class II sizimangodalira "Basic Insulation" kuti ziteteze ku magetsi, komanso zimapereka njira zina zodzitetezera monga "Double Insulation" kapena "Reinforced Insulation".Palibe zikhalidwe zokhuza kudalirika kwa nthaka yoteteza kapena kuyika.
