Gwajin juriya na insulation ya dace don auna ƙimar juriya na kayan kariya daban-daban da juriya na juriya na injina, injina, igiyoyi da kayan lantarki don tabbatar da cewa waɗannan kayan aikin, na'urorin lantarki da layin suna aiki a cikin yanayin al'ada kuma guje wa haɗari kamar girgiza wutar lantarki. hasarar rayuka da lalacewar kayan aiki.
Matsalolin gama gari na gwajin juriya na insulation sune kamar haka:
1. Lokacin auna juriya na capacitive, menene dangantakar dake tsakanin fitarwa na gajeren lokaci na gwajin juriya na insulation da bayanan da aka auna, kuma me yasa?
Fitowar gajeriyar kewayawa na mai gwajin juriya na iya nuna juriya na ciki na tushen wutar lantarki mai ƙarfi.
Yawancin abubuwan gwajin insulation sune masu ɗaukar nauyi, kamar dogayen igiyoyi, injina tare da ƙarin windings, transformers, da sauransu. Don haka, lokacin da abin da aka auna yana da ƙarfin ƙarfin, a farkon aikin gwajin, babban ƙarfin wutar lantarki a cikin ma'aunin juriya ya kamata ya yi caji. capacitor ta hanyar juriyarsa na ciki, kuma a hankali yana cajin wutar lantarki zuwa abin da aka ƙididdige ƙimar ƙarfin lantarki na ma'aunin juriya.Idan ƙimar ƙarfin abin da aka auna yana da girma, ko juriya na ciki na babban ƙarfin wutar lantarki yana da girma, tsarin caji zai ɗauki tsawon lokaci.
Ana iya ƙayyade tsawonsa ta samfurin R da C (a cikin dakika), watau t = R * C lodi.
Saboda haka, a lokacin gwajin, ana buƙatar cajin nauyin capacitive zuwa wutar lantarki, kuma saurin cajin DV / DT daidai yake da rabon caji na yanzu I da capacitance load C. Wato DV / dt = I / C.
Saboda haka, ƙananan juriya na ciki shine, mafi girma da cajin halin yanzu shine, kuma mafi sauri da kwanciyar hankali sakamakon gwajin shine.
2. Menene aikin ƙarshen "g" na kayan aiki?A cikin yanayin gwaji na babban ƙarfin lantarki da ƙarfin juriya, me yasa aka haɗa kayan aiki zuwa tashar "g"?
Ƙarshen "g" na kayan aiki shine tashar kariya, wanda ake amfani dashi don kawar da tasirin danshi da datti a cikin yanayin gwaji akan sakamakon ma'auni.Ƙarshen “g” na kayan aikin shine a ketare ɗigon ruwan da ke saman abin da aka gwada, ta yadda ruwan ɗigo ba zai wuce ta da’irar gwajin na’urar ba, yana kawar da kurakuran da ke haifarwa.Lokacin gwada ƙimar juriya mai girma, ana buƙatar amfani da ƙarshen G.
Gabaɗaya magana, ana iya la'akari da g-terminal lokacin da ya fi 10g.Koyaya, wannan kewayon juriya ba cikakke ba ne.Yana da tsabta kuma ya bushe, kuma ƙarar abin da za a auna yana da ƙananan, don haka yana iya zama tsayayye ba tare da auna 500g a g-end ba;A cikin jika da ƙazanta yanayi, ƙananan juriya shima yana buƙatar g m.Musamman, idan an gano cewa sakamakon yana da wuya a tsaya tsayin daka lokacin auna juriya mai girma, ana iya la'akari da g-terminal.Bugu da ƙari, ya kamata a lura cewa ba a haɗa tashar kariya ta G zuwa Layer na kariya ba, amma an haɗa shi da insulator tsakanin L da E, ko a cikin multi strand waya, ba zuwa wasu wayoyi da aka gwada ba.
3. Me ya sa ya zama dole don auna ba kawai juriya mai tsafta ba, har ma da shayarwa da ma'auni na polarization lokacin aunawa da rufi?
PI shine ma'auni na polarization, wanda ke nufin kwatanta juriya na rufi a cikin minti 10 da minti 1 yayin gwajin gwaji;
DAR shine ma'aunin sha na dielectric, wanda ke nufin kwatanta tsakanin juriya na rufi a cikin minti daya da kuma a cikin 15s;
A cikin gwajin insulation, ƙimar juriya mai ƙima a wani lokaci ba zai iya yin cikakken nuna ingancin aikin abin da aka gwada ba.Wannan shi ne saboda dalilai guda biyu masu zuwa: a gefe guda, juriya na kayan aiki na kayan aiki iri ɗaya yana da ƙananan lokacin da girma ya girma, kuma babba lokacin da ƙarami ya kasance.A daya hannun, akwai cajin absorptivity da polarization tafiyar matakai a insulating kayan lokacin da babban ƙarfin lantarki da ake amfani da.Sabili da haka, tsarin wutar lantarki yana buƙatar ƙimar sha (r60s zuwa r15s) da ƙididdiga na polarization (r10min zuwa r1min) ya kamata a auna su a cikin gwajin insulation na babban gidan wuta, na USB, mota da sauran lokuta da yawa, kuma ana iya yin hukunci da yanayin yanayin rufewa ta hanyar. wannan data.
4. Me yasa batura da yawa na gwajin juriya na lantarki zasu iya samar da babban ƙarfin lantarki na DC?Wannan ya dogara ne akan ka'idar canza DC.Bayan haɓaka aikin kewayawa, ƙananan ƙarfin samar da wutar lantarki yana ɗagawa zuwa mafi girman ƙarfin wutar lantarki na DC.Kodayake babban ƙarfin lantarki da aka samar ya fi girma, ƙarfin fitarwa ya fi ƙanƙanta (ƙananan makamashi da ƙananan halin yanzu).
Lura: ko da ikon yana da ƙananan ƙananan, ba a ba da shawarar taɓa gwajin gwajin ba, har yanzu za a yi tingling.
Lokacin aikawa: Mayu-07-2021
