Wadannan suna bincika wasu bambance-bambance daban-daban tsakanin Laboratory Laboratory (UL) da ake buƙata don gwaji masu karewa (SPDs); ANSI / UL 1449 na uku da Hukumar Kasuwancin Electrotechnical (IEC) ta buƙaci gwaji don SPDs, IEC 61643-1.

Ra'ayin Hanyoyin Watsi na Kwanan Wata (SCCR): Ƙarfin halin yanzu wanda jarrabawar SPD ta gwada ta iya jurewa a tashoshin da aka haɗa, ba tare da shiga cikin yakin ba ta kowane hanya.

UL: Tana gwada cikakken samfurin a sau biyu na wutar lantarki wanda ba za a iya gani ba idan samfurori gaba ɗaya ba shi da cikakken layi. Ana gwada dukkan samfurin (kamar yadda aka shigo); ciki har da oxide varidors (MOVs).

IEC: Gwaji kawai yana kallon tashoshi da kuma haɗin jiki don sanin idan sun kasance da ƙarfin isa don magance matsalar. Ana maye gurbin MOV da wani shinge na jan karfe kuma an sanya fuse mai bada shawara a cikin layi (a waje ga na'urar).

Imax: A IEC 61643-1 - Ƙimar darajar halin yanzu ta hanyar SPD wanda ke da nauyin 8 / 20 da girma bisa ga gwajin gwaji na gwajin II.

UL: Shin bai gane da bukatar buƙatar gwajin ba.

IEC: Ana amfani da gwajin sake zagayowar aikin aiki don hawa har zuwa ma'anar Imax (ƙaddara ta masana'anta). Ana nufin wannan don nemo “makaunun maki” a cikin ƙira yayin da aka gabatar da su zuwa babban mataki. Ana gudanar da wannan azaman tsammanin rayuwa ko gwajin ƙarfi. Fus ɗin yana buƙatar tsayayya da Imax, kuma gwajin yana bincika kwanciyar hankali na SPD (bayan kowane motsawar motsa jiki yana kawo SPD har zuwa matsakaicin ƙarfin lantarki mai aiki na MCOV) da yanayin ta na jiki.

Na zama maras kyau: Ƙimar darajar halin yanzu ta hanyar SPD da ke da magunguna ta yanzu na 8 / 20.

UL: Kwararrun gwaje-gwaje na kama da IEC, duk da haka, ƙananan sakamako ba su haɗuwa zuwa Ƙimar Talla (darajar da ake amfani dashi a duniya don daidaitaccen lantarki). Maimakon haka, UL yana amfani da ni na ƙayyadadden ƙayyadadden ƙayyadadden samfurin Samfur (VPR). Matakan suna iyakance ga iyakar 20 kA. SPD ya kasance aiki bayan 15 surges.

IEC: Bana iyakance gwajin gwaji a 20kA ba, duk da haka, zaɓin mai yin amfani da shi A matakin an yi amfani dashi don samun darajar Up, darajar da aka dauka shine aikin karewa na SPD. Ana amfani da wannan darajar don daidaitawa na lantarki (bayanan gina waya, kayan aiki).

Saboda haka makasudin masu sana'a shine ƙoƙari don cimma matsayi mafi girman matsakaiciyar matsakaicin matakin da mafi ƙasƙanci mafi ƙasƙanci. Yawancin masana'antu sunyi gwajin kawai kamar yadda 20 kA don haka zasu bayyana cewa suna da ƙananan Up.

Class da category

UL: UL Rubuta nau'in mai tsarawa ne tare da bambanci zuwa hanyar da na zaɓa a gwada (domin na'urar da ke samar da SCCR ya kamata a haɗa shi kuma ya tsira lokacin yin gwajin gwaji).

IEC: Ya tsara wasu gwaje-gwaje azaman aji na I, II, ko III. Nada aji a tsakani na da na II yana da alaƙa da sha'awar motsa jiki - Class I; an I imp test (10 × 350) da aji II - 8 x 20 μs.

IEC ya tsara wasu gwaje-gwaje a matsayin aji na I, II, ko III kuma za'a iya jituwa da nau'in I, II, III, ko IV na UL. Akwai wasu inganci ga duka biyu suna gano wurin shigarwa da aka yarda da samfurin (UL) da kuma yin amfani da ƙaƙƙarfan motsi / ƙarancin aiki ga waɗannan samfurori da za'a shigar a wurare masu ƙari (IEC).

Waveforms: Girman hoto na tasirin motsa jiki wanda ya nuna siffarsa kuma yayi canji a cikin amplitude tare da lokaci.

UL: Gane ka'idar kirkirar 8 x 20 μs.

IEC: IEC ta ƙunshi nauyin 2 a gwajin su, 8 x 20 μs wanda aka yi amfani dasu don gwaji na II don wakiltar hawan da aka jawo a kan layin wutar lantarki. Kuma 10 x 350 μs nau'in tsarawa wanda aka yi amfani dashi na aji na gwaji wanda ya wakilci hawan hasken walƙiya mai tsayi (saboda ginin ko tashar wutar lantarki) .Ya yi amfani da wasu nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'i na gwaji don yin amfani (gwaji na III).