Mawu akuti "ground resistance" ndi mawu osadziwika bwino.Pamiyezo ina (monga miyezo yachitetezo pazida zapakhomo), imatanthawuza kukana kwapansi mkati mwa zida, pomwe pamiyezo ina (monga pamakina opangira pansi), imatanthawuza kukana kwa chipangizo chonsecho.Zomwe tikukambazi zikukhudzana ndi kukana kwapansi mkati mwa zida, ndiko kuti, kukana kwapansi (komwe kumatchedwanso kukana kwapansi) muzotsatira zachitetezo chazinthu zonse, zomwe zimawonetsa mbali zowonekera za zida ndi maziko onse a zida.kukana pakati pa ma terminals.Muyezo wamba umanena kuti kukana uku sikuyenera kukhala kwakukulu kuposa 0.1.
Kukaniza pansi kumatanthawuza kuti pamene kusungunula kwa chipangizo chamagetsi kulephera, zitsulo zopezeka mosavuta monga malo otsekera magetsi zikhoza kulipidwa, ndipo chitetezo chodalirika chapansi chimafunika kuti chitetezeke kwa wogwiritsa ntchito magetsi.Kukaniza pansi ndi chizindikiro chofunikira choyezera kudalirika kwa chitetezo chapansi cha magetsi.
Kukana kwapansi kungayesedwe ndi tester resistance tester.Popeza kukana kwapansi kumakhala kochepa kwambiri, nthawi zambiri m'ma makumi a milliohms, ndikofunikira kugwiritsa ntchito miyeso ya materminal anayi kuti muchepetse kukana kukhudzana ndikupeza zotsatira zolondola zoyezera.Woyesa kukana pansi amapangidwa ndi magetsi oyesera, dera loyesa, chizindikiro ndi dera la alamu.Mphamvu yoyesera imapanga kuyesa kwa AC kwa 25A (kapena 10A), ndipo chigawo choyesera chimakulitsa ndikusintha chizindikiro chamagetsi chomwe chimapezedwa ndi chipangizocho poyesedwa, chomwe chimawonetsedwa ndi chizindikiro.Ngati kukana kwapansi koyezera kuli kwakukulu kuposa mtengo wa alamu (0.1 kapena 0.2), chidacho chidzamveka Alamu Yowala.
Njira zoyeserera zoyeserera zoyeserera zoyendetsedwa ndi pulogalamu
Pamene pulogalamu-yolamulidwa grounding resistance tester imayeza kukana kwapansi, chojambulacho chiyenera kumangirizidwa kumalo olumikizirana nawo pamtunda wa gawo lofikirako.Nthawi yoyeserera sikophweka kukhala yayitali kwambiri, kuti musawotche mphamvu yoyeserera.
Kuti muyese molondola kukana kwapansi, mawaya awiri owonda (mawaya oyesa ma voltage) pa clip yoyeserera ayenera kuchotsedwa pamagetsi amagetsi a chipangizocho, m'malo ndi mawaya ena awiri, ndikulumikizidwa ku malo olumikizirana pakati pa chinthu choyezera ndi chapano. kuyesa kopanira kuti athetseretu chikoka cha kukana kukhudzana pa mayeso.
Kuphatikiza apo, woyesa kukana pansi amathanso kuyeza kukana kukhudzana kwamitundu yosiyanasiyana yamagetsi (olumikizana) kuphatikiza kuyeza kukana kwapansi.
Merrick Instruments ' Programmable Earth Resistance Tester RK9930Mayeso apamwamba kwambiri ndi 30A;Mtengo wa RK9930AMayeso apamwamba kwambiri ndi 40A;Mtengo wa RK9930BPazipita linanena bungwe panopa ndi 60A; Pakuti grounding kukana mayesero, pansi pa mafunde osiyanasiyana, malire chapamwamba kukana mayeso amawerengedwa motere:
Pamene kuwerengeredwa kukana R kuli kwakukulu kuposa mtengo wapamwamba wotsutsa wa tester, tengani mtengo wotsutsa kwambiri.
Ubwino wotani wa pulogalamu-controlled earth resistance tester?
Programmable Earth Resistance Tester The sine wave jenereta imayang'aniridwa makamaka ndi CPU kuti ipange mawonekedwe a sine wave, ndipo kupotoza kwa mawonekedwe ake kumakhala kosakwana 0.5%.Mulingo wa sine wave umatumizidwa kudera lamagetsi amplifier kuti akulitse mphamvu, ndiyeno zomwe zilipo zimatulutsidwa ndi chosinthira chaposachedwa.Zomwe zimatuluka zimadutsa pa transformer yamakono.Sampling, kukonza, kusefa, ndi kusintha kwa A/D kumatumizidwa ku CPU kuti iwonetsedwe.Kuyesa kwamagetsi, kukonzanso, kusefa, ndi kutembenuka kwa A/D kumatumizidwa ku CPU, ndipo kuchuluka kwa kukana kumawerengedwa ndi CPU.
Programmable Earth Resistance TesterPoyerekeza ndi choyesa chamtundu wa voltage regulator mtundu wa grounding resistance tester, ili ndi zabwino izi:
1. Nthawi zonse gwero linanena bungwe;khazikitsani zamakono ku 25A, mkati mwa mayesero a mndandanda wa oyesa awa, panthawi ya mayesero, zotulukapo za tester ndi 25A;zotuluka panopa sizisintha ndi katundu.
2. Kutulutsa kwaposachedwa kwa pulogalamu yoyeserera yoyeserera sikukhudzidwa ndi mphamvu yamagetsi.Mu mtundu wamtundu wa voltage regulator woyesa kukana, ngati magetsi akusintha, zomwe zimatuluka zimasinthasintha nawo;ntchito iyi ya pulogalamu olamulira grounding kukaniza Tester sangapezeke ndi voteji regulator mtundu grounding kukana tester.
3.The RK7305 grounding resistance testerali ndi ntchito calibration mapulogalamu;ngati kutulutsa komweko, kuwonetsa kukana kwaposachedwa komanso kuyesa kwa tester kupitilira kuchuluka komwe kwaperekedwa m'bukuli, ndiye kuti wogwiritsa ntchitoyo amatha kuyesa kuyesa molingana ndi masitepe ogwiritsira ntchito buku la ogwiritsa ntchito.Zithunzi za RK9930Ikhoza kusinthidwa zokha osati kukhudzidwa ndi chilengedwe
4. The linanena bungwe pafupipafupi panopa ndi zosiyanasiyana; RK9930,Mtengo wa RK9930A,Mtengo wa RK9930BKutulutsa kwaposachedwa kwa tester resistance tester kuli ndi ma frequency awiri oti musankhe: 50Hz/60Hz, yomwe imatha kukwaniritsa zosowa zamitundu yosiyanasiyana yoyesa.
Kuyesedwa kwa chitetezo cha zida zapakhomo
1. Kuyesa kwa insulation resistance
Kukaniza kwa zida zamagetsi zam'nyumba ndi chimodzi mwazizindikiro zofunika kuwunika momwe zimakhalira.Kukana kwa insulation kumatanthawuza kukana pakati pa mbali yamoyo ya chipangizo chapakhomo ndi gawo lachitsulo lomwe silili lamoyo.Ndi chitukuko chofulumira cha makampani opanga zipangizo zapakhomo komanso kuwonjezeka kwakukulu kwa kutchuka kwa zinthu zoterezi, pofuna kuonetsetsa chitetezo chaumwini kwa ogwiritsa ntchito, zofunikira za mtundu wa kutchinjiriza kwa zipangizo zapakhomo zikuwonjezeka kwambiri.
Njira yoyezera chida cha insulation resistance
1. Pulagini magetsi, yatsani chosinthira mphamvu, chowunikira chamagetsi chimayatsidwa;
2. Sankhani mphamvu yogwiritsira ntchito ndikusindikiza batani lofunika lamagetsi;
3. Sankhani mtengo wa alamu;
4. Sankhani nthawi yoyesera (pazithunzi zowonetsera digito, mtundu wa pointer ulibe ntchito iyi);
5. School infinity ();(RK2681 mndandanda ukhoza kuthandizira)
6. Kuti muwongolere sikelo yonse, lumikizani chopinga cha ma calibration chomwe chili kumapeto kwake, ndipo sinthani potentiometer ya sikelo yonse kuti cholozeracho chiloze ku sikelo yonse.
7. Lumikizani chinthu choyezera kumapeto kwake ndikuwerenga kukana kwa insulation.
Njira zodzitetezera zoyeserera zoyeserera za insulation resistance
1. Iyenera kutenthedwa bwino isanayambe kuyeza kuti ichotse chinyezi mu makina, makamaka nyengo yachinyezi m'nyengo yamvula kumwera.
2. Poyezera kukana kwa insulation ya zida zamagetsi zomwe zikugwira ntchito, zidazo ziyenera kuchotsedwa poyambira, ndipo muyeso uyenera kupangidwa mwachangu zida za hotbed zisanatsike kutentha kwa chipinda kuti zisakhudzidwe ndi mtengo woyezera. condensation pa insulating pamwamba.
3. Chida choyezera pakompyuta chikuyenera kukhala chosagwira ntchito, ndipo chosinthira chida chiyenera kukhala paboma kuti chiyezetse kukana kwake, ndipo mabwalo kapena zigawo zomwe sizikugwirizana ndi gawo lomwe layesedwa liyenera kulumikizidwa panthawi yoyezera. .
4. Pofuna kupewa kuti muyeso wa muyeso usakhudzidwe ndi kusasunthika kosauka kwa waya wolumikizira muyeso, kutsekemera kwa waya wolumikizira quasi kuyenera kuyang'aniridwa pafupipafupi osati kupotoza wina ndi mnzake.
Nthawi yotumiza: Oct-19-2022
