1, mfundo yoyesera:
a) Kulimbana ndi mayeso a voltage:
Mfundo yofunikira yogwirira ntchito ndi: yerekezerani kutayikira komwe kumapangidwa ndi chida choyesedwa pamagetsi okwera pamayeso oyeserera ndi choyezera voteji ndi chigamulo chokhazikitsidwa kale.Ngati kutayikira komwe kwapezeka kuli kochepa kuposa mtengo wokonzedweratu, chida chimapambana mayeso.Pamene kutayikira komwe kwapezeka kuli kwakukulu kuposa kuweruza komweko, voteji yoyezetsa imadulidwa ndipo alamu yomveka ndi yowoneka imatumizidwa, kuti adziwe voteji yopirira mphamvu ya gawo loyesedwa.
Pachiyeso choyamba choyesa dera lapansi,
Voltage withstand tester imapangidwa makamaka ndi AC (yachindunji) yamagetsi apamwamba kwambiri, chowongolera nthawi, dera lodziwikiratu, dera lowonetsa ndi alamu.Mfundo yofunikira yogwirira ntchito ndi: chiŵerengero cha kutayikira kwapano kopangidwa ndi chida choyesedwa pamayeso okwera voteji ndi choyezera voteji chikufanizidwa ndi chiweruzo chokhazikitsidwa kale.Ngati kutayikira komwe kwapezeka kuli kochepa kuposa mtengo wokonzedweratu, chidacho chimapambana mayeso, Pamene kutayikira komwe kwapezeka kuli kwakukulu kuposa kuweruza komweko, mphamvu yoyeserera imadulidwa kwakanthawi ndipo alamu yomveka komanso yowoneka imatumizidwa kuti idziwe voteji. kupirira mphamvu ya gawo loyesedwa.
b) Insulation impedance:
Tikudziwa kuti voteji yoyeserera ya insulation impedance nthawi zambiri imakhala 500V kapena 1000V, zomwe zimafanana ndi kuyesa kuyesa kwa DC kupirira.Pansi pa voliyumu iyi, chidacho chimayesa mtengo wapano, ndiyeno chimakulitsa mphamvuyi kudzera mu mawerengedwe apakati.Pomaliza, imadutsa lamulo la Ohm: r = u / i, pomwe u ndi 500V kapena 1000V yoyesedwa, Ndipo ine ndiye kutayikira pamagetsi awa.Malinga ndi kupirira kwa mayeso amagetsi, titha kumvetsetsa kuti pano ndi yaying'ono kwambiri, nthawi zambiri imakhala yosakwana 1 μ A .
Zitha kuwoneka kuchokera pamwambapa kuti mfundo yoyeserera yoyeserera ndi yofanana ndi ya test test voltage, koma ndi mawu ena chabe a lamulo la Ohm.Kutayikira kwapano kumagwiritsidwa ntchito pofotokoza momwe zinthu zimayendera poyesedwa, pomwe insulation impedance ndi kukana.
2, Cholinga cha voteji kupirira mayeso:
Voltage standstand test ndi mayeso osawononga, omwe amagwiritsidwa ntchito kuti azindikire ngati mphamvu yotchinjiriza ya zinthu ndiyoyenera pansi pamagetsi apamwamba osakhalitsa.Imagwiritsa ntchito magetsi okwera kwambiri pazida zoyesedwa kwa nthawi inayake kuti zitsimikizire kuti ntchito yotchinjiriza ya zidazo ndi yamphamvu mokwanira.Chifukwa china cha mayesowa ndikuti amathanso kuzindikira zolakwika zina za chidacho, monga mtunda wosakwanira wa creepage komanso chilolezo chamagetsi chosakwanira popanga.
3, Voltage kupirira mayeso voteji:
Pali malamulo ambiri a test voltage = magetsi opangira magetsi × 2+1000V.
Mwachitsanzo: ngati mphamvu yamagetsi yamagetsi yoyesera ndi 220V, voteji yoyeserera = 220V × 2+1000V=1480V.
Nthawi zambiri, nthawi yoyeserera yamagetsi ndi mphindi imodzi.Chifukwa cha kuchuluka kwa mayeso olimbana ndi magetsi pamzere wopanga, nthawi yoyeserera nthawi zambiri imachepetsedwa kukhala masekondi angapo.Pali mfundo yothandiza.Nthawi yoyeserera ikachepetsedwa kukhala masekondi 1-2 okha, voteji yoyeserera iyenera kukulitsidwa ndi 10-20%, kuti zitsimikizire kudalirika kwa kutchinjiriza pakuyesa kwakanthawi kochepa.
4, Alamu yamakono
Kuyika kwa alamu kudzatsimikiziridwa molingana ndi zinthu zosiyanasiyana.Njira yabwino ndikuyesa kuyesa kwaposachedwa pagulu la zitsanzo pasadakhale, kupeza mtengo wapakati, ndiyeno kudziwa mtengo wokwera pang'ono kuposa mtengo wapakati womwe wakhazikitsidwa.Chifukwa kutayikira kwa chipangizo choyesedwa kumakhalapo mosapeweka, ndikofunikira kuwonetsetsa kuti ma alarm apano ndi akulu mokwanira kuti asayambitsidwe ndi cholakwika chomwe chikutuluka, ndipo chiyenera kukhala chaching'ono kuti chisadutse chitsanzo chosayenera.Nthawi zina, n'zothekanso kudziwa ngati chitsanzocho chikugwirizana ndi mapeto a choyesa magetsi poika otchedwa otsika alamu panopa.
5, Kusankhidwa kwa mayeso a AC ndi DC
Magetsi oyesera, miyezo yambiri yachitetezo imalola kugwiritsa ntchito magetsi a AC kapena DC polimbana ndi mayeso amagetsi.Ngati magetsi oyesa a AC agwiritsidwa ntchito, mphamvu yamagetsi ikafika, insulator yoyesedwa idzakhala ndi kupanikizika kwakukulu pamene mtengo wapamwamba uli wabwino kapena woipa.Chifukwa chake, ngati asankha kusankha kugwiritsa ntchito mayeso amagetsi a DC, ndikofunikira kuwonetsetsa kuti voliyumu yoyeserera ya DC ndiyowirikiza kawiri voteji ya AC, kuti voteji ya DC ikhale yofanana ndi nsonga yamagetsi a AC.Mwachitsanzo: 1500V AC voteji, kuti DC voteji kubala kuchuluka chomwecho mphamvu magetsi ayenera kukhala 1500 × 1.414 ndi 2121v DC voteji.
Ubwino umodzi wogwiritsa ntchito magetsi oyesera a DC ndikuti mumayendedwe a DC, magetsi omwe akuyenda kudzera pa chipangizo choyezera cha alamu cha voltage tester ndichomwe chikuyenda mu zitsanzo.Ubwino wina wogwiritsa ntchito kuyesa kwa DC ndikuti magetsi amatha kuyikidwa pang'onopang'ono.Mphamvu yamagetsi ikawonjezeka, wogwiritsa ntchito amatha kuzindikira zomwe zikuyenda mu chitsanzocho chisanachitike.Ndikofunika kuzindikira kuti mukamagwiritsa ntchito DC voltage standstand tester, chitsanzocho chiyenera kutulutsidwa pambuyo poti mayesowo atsirizidwa chifukwa cha kulipiritsa kwa capacitance mu dera.M'malo mwake, ziribe kanthu kuchuluka kwa magetsi omwe amayesedwa komanso mawonekedwe a chinthucho, ndikwabwino kutulutsa musanagwiritse ntchito.
Kuipa kwa DC voteji teststand test ndikuti imangogwiritsa ntchito voliyumu yoyesera mbali imodzi, ndipo singayike kupsinjika kwamagetsi pamitundu iwiri ngati mayeso a AC, ndipo zinthu zambiri zamagetsi zimagwira ntchito pansi pamagetsi a AC.Kuphatikiza apo, chifukwa voteji yoyeserera ya DC ndiyovuta kupanga, mtengo wa mayeso a DC ndiokwera kuposa mayeso a AC.
Ubwino wa AC voltage test test ndikuti imatha kuzindikira polarity yonse yamagetsi, yomwe ili pafupi ndi zomwe zikuchitika.Komanso, chifukwa AC voteji si mlandu capacitance, nthawi zambiri, khola mtengo panopa akhoza anapezerapo mwachindunji outputting voteji lolingana popanda sitepe pang'onopang'ono mmwamba.Komanso, mayeso a AC akamaliza, palibe kutulutsa kwachitsanzo komwe kumafunikira.
Kuperewera kwa AC voltage kupirira mayeso ndikuti ngati pali y capacitance yayikulu pamzere woyesedwa, nthawi zina, mayeso a AC adzaganiziridwa molakwika.Miyezo yambiri yachitetezo imalola ogwiritsa ntchito kuti asalumikizane ndi ma capacitor a Y asanayesedwe, kapena m'malo mwake agwiritse ntchito mayeso a DC.Pamene kuyesa kwa magetsi a DC kumawonjezeka pa Y capacitance, sikudzaganiziridwa molakwika chifukwa mphamvuyo sidzalola kuti panopa idutse panthawiyi.
Nthawi yotumiza: May-10-2021
