I:Lona umbuzo abakhiqizi abaningi bemikhiqizo abafuna ukuwubuza, futhi impendulo evame kakhulu ukuthi "ngoba izinga lokuphepha liyakusho."Uma ungakwazi ukuqonda ngokujulile isizinda semithetho yokuphepha kagesi, uzothola umthwalo wemfanelo ngemuva kwawo.ngencazelo.Nakuba ukuhlolwa kokuphepha kukagesi kuthatha isikhathi esincane emugqeni wokukhiqiza, kukuvumela ukuthi wehlise ingcuphe yokugaywa kabusha komkhiqizo ngenxa yezingozi zikagesi.Ukuyilungisa okokuqala kuyindlela efanele yokunciphisa izindleko nokugcina umusa.
A:Isivivinyo sokulimala kukagesi sihlukaniswe kakhulu ngezinhlobo ezine ezilandelayo: I-Dielectric Withstand / Hipot Test: Ukuhlolwa kwe-voltage ye-standard kusebenzisa amandla kagesi aphezulu kumandla nakumasekhethi aphansi omkhiqizo futhi kukala isimo sawo sokuwohloka.I-Isolation Resistance Test: Kala isimo sokufakwa kukagesi somkhiqizo.Ukuhlolwa Kwamanje Kokuvuza: Thola ukuthi ingabe ukuvuza kwamanje kokunikezwa kwamandla e-AC/DC kutheminali yaphansi kuyawedlula yini izinga.Indawo Yokuzivikela: Hlola ukuthi izakhiwo zensimbi ezifinyelelekayo zisekelwe kahle yini.
A:Ngokuphepha kwabahloli kubakhiqizi noma ezindaweni zokuhlola, sekwenziwe e-Europe iminyaka eminingi.Kungakhathaliseki ukuthi abakhiqizi nabahloli bezinto zikagesi, imikhiqizo yobuchwepheshe bolwazi, izinto zikagesi zasendlini, amathuluzi ayimishini noma ezinye izinto zokusebenza, emithethweni ehlukahlukene yezokuphepha Kunezahluko emithethweni, noma ngabe i-UL, IEC, EN, ehlanganisa ukumaka indawo yokuhlola (abasebenzi indawo, indawo yensimbi, indawo ye-DUT), ukumaka okokusebenza (okumakwe ngokusobala "ingozi" noma izinto ezivivinywayo), isimo esiphansi sebhentshi lokusebenza lezinto zokusebenza nezinye izinsiza ezihlobene, namandla okufakwa kukagesi ethuluzi ngalinye lokuhlola (IEC 61010).
A:Ukuhlolwa kwe-voltage noma ukuhlolwa kwe-voltage ephezulu (ukuhlolwa kwe-HIPOT) kuyizinga elingu-100% elisetshenziselwa ukuqinisekisa ikhwalithi nezici zokuphepha zikagesi zemikhiqizo (njengalezo ezidingwa yi-JSI, CSA, BSI, UL, IEC, TUV, njll. ama-ejensi ezokuphepha) Kuphinde kube wukuhlolwa kokuphepha komugqa wokukhiqiza owaziwa kakhulu futhi okwenziwa njalo.Ukuhlolwa kwe-HIPOT kuwuhlolo olungacekeli phansi ukuze kutholwe ukuthi izinto zokuvikela ugesi zimelana ngokwanele nama-voltage aphezulu esikhashana, futhi kuwukuhlola kwamandla kagesi aphezulu okusebenza kuzo zonke izinto zokusebenza ukuze kuqinisekiswe ukuthi izinto ezibambayo zanele.Ezinye izizathu zokwenza ukuhlolwa kwe-HIPOT ukuthi ikwazi ukubona amaphutha angenzeka njengokunganele kwe-creepage amabanga kanye nokucaciswa okudalwe phakathi nenqubo yokukhiqiza.
A: Imvamisa, i-voltage waveform ohlelweni lwamandla i-sine wave.Ngesikhathi sokusebenza kwesistimu yamandla, ngenxa yokushaywa kombani, ukusebenza, amaphutha noma ukufaniswa kwepharamitha engafanele yemishini kagesi, i-voltage yezinye izingxenye zesistimu ikhuphuka ngokuzumayo futhi idlule kakhulu i-voltage yayo elinganiselwe, okuyi-overvoltage.I-overvoltage ingahlukaniswa izigaba ezimbili ngokuya ngezimbangela zayo.Enye iwukweqisa okubangelwa umbani oqondile noma ukungeniswa kombani, okubizwa ngokuthi i-overvoltage yangaphandle.Ubukhulu be-voltage yamanje kanye ne-impulse voltage bukhulu, futhi ubude besikhathi bufushane kakhulu, obulimaza kakhulu.Kodwa-ke, ngenxa yokuthi imigqa engaphezulu kuka-3-10kV nangaphansi emadolobheni nasezimbonini ezijwayelekile zivikelwe yizindawo zokusebenzela noma izakhiwo ezinde, amathuba okuthi ushaywe umbani ngokuqondile mancane kakhulu, okuyinto ephephile uma kuqhathaniswa.Ngaphezu kwalokho, okuxoxwa ngakho lapha yizinto ezisebenza ngogesi zasendlini, ezingekho ngaphakathi kobubanzi obalulwe ngenhla, futhi ngeke kuphinde kuxoxwe ngazo.Olunye uhlobo lubangelwa ukuguqulwa kwamandla noma izinguquko zepharamitha ngaphakathi kwesistimu yamandla, njengokufaka ulayini ongalayishi, ukunqamula isiguquli esingalayishi, kanye nesisekelo se-arc yesigaba esisodwa ohlelweni, okubizwa ngokuthi i-overvoltage yangaphakathi.I-overvoltage yangaphakathi iyisisekelo esiyinhloko sokunquma izinga elijwayelekile lokufakwa kwemishini kagesi ehlukahlukene ohlelweni lwamandla.Okusho ukuthi, idizayini yesakhiwo sokufakelwa komkhiqizo akufanele sinake kuphela i-voltage elinganiselwe kodwa futhi nokugcwala ngokweqile kwangaphakathi kwendawo yokusetshenziswa komkhiqizo.Ukuhlolwa kwe-voltage ye-standard ukuthola ukuthi ukwakheka kwe-insulation yomkhiqizo kungamelana nokugcwala ngokweqile kwangaphakathi kwesistimu yamandla.
A:Imvamisa ukuhlolwa kwe-AC ukumelana nogesi kwamukeleka kakhulu kuma-ejensi wezokuphepha kune-DC ekwazi ukumelana nokuhlolwa kukagesi.Isizathu esiyinhloko ukuthi izinto eziningi ezivivinywayo zizosebenza ngaphansi kwamandla kagesi we-AC, futhi isivivinyo se-AC ukumelana ne-voltage sinikeza inzuzo yokushintshanisa ama-polarity amabili ukuze kugcizelele ukufakwa, okuseduze nengcindezi umkhiqizo ozohlangabezana nayo ekusetshenzisweni kwangempela.Njengoba ukuhlolwa kwe-AC kungakhokhisi umthwalo we-capacitive, ukufundwa kwamanje kuhlala kufana kusukela ekuqaleni kwesicelo se-voltage kuze kube sekupheleni kokuhlolwa.Ngakho-ke, asikho isidingo sokukhuphula i-voltage ngoba azikho izinkinga zokuzinza ezidingekayo ukuze kuqashwe ukufundwa kwamanje.Lokhu kusho ukuthi ngaphandle kokuthi umkhiqizo ongaphansi kokuhlolwa uzwa i-voltage esetshenziswe ngokuzumayo, u-opharetha angasebenzisa ngokushesha i-voltage egcwele futhi afunde yamanje ngaphandle kokulinda.Njengoba i-voltage ye-AC ingakhokhisi umthwalo, asikho isidingo sokukhulula idivayisi ngaphansi kokuhlolwa ngemva kokuhlolwa.
A:Uma kuhlolwa imithwalo ye-capacitive, inani lamanje liqukethe amaza asebenzayo kanye nokuvuza.Uma inani lamanje elisebenzayo likhulu kakhulu kunelamanje lokuvuza langempela, kungase kube nzima ukuthola imikhiqizo enokuvuza okudlulele kwamanje.Lapho kuhlolwa imithwalo emikhulu ye-capacitive, inani lamanje elidingekayo likhulu kakhulu kunelo lokuvuza ngokwalo.Lokhu kungase kube yingozi enkulu njengoba u-opharetha echayeka kumaza aphezulu
A:Lapho idivayisi ehlolwayo (i-DUT) ishajwe ngokugcwele, ukugeleza kwamanje kokuvuza kweqiniso kuphela.Lokhu kuvumela i-DC Hipot Tester ukuthi ibonise ngokucacile ukuvuza kwamanje komkhiqizo ongaphansi kokuhlolwa.Ngenxa yokuthi amandla okushaja ahlala isikhathi esifushane, izidingo zamandla ze-DC ukumelana ne-voltage test ngokuvamile zingaba ngaphansi kakhulu kulezo ze-AC ukumelana ne-voltage tester esetshenziselwa ukuhlola umkhiqizo ofanayo.
EUkuhlolwa kwe-DC kushaja i-capacitor.Uma i-DUT isebenzisa amandla e-AC ngempela, indlela ye-DC ayilingisi isimo sangempela.
A:Kunezinhlobo ezimbili zokuhlolwa kwamandla kagesi: i-AC ukumelana nokuhlolwa kwe-voltage kanye ne-DC ukumelana nokuhlolwa kwe-voltage.Ngenxa yezimpawu zezinto zokuvikela, izindlela zokuwohloka zama-voltage e-AC ne-DC zihlukile.Izinto eziningi zokuvikela i-insulating kanye nezinhlelo ziqukethe uchungechunge lwemidiya ehlukene.Uma i-voltage yokuhlola ye-AC isetshenziswa kuyo, i-voltage izosatshalaliswa ngokulingana namapharamitha afana ne-dielectric constant kanye nobukhulu bento.Nakuba i-DC voltage isabalalisa kuphela i-voltage ngokulingana nokumelana kwezinto.Futhi empeleni, ukuwohloka kwesakhiwo se-insulating kuvame ukubangelwa ukuwohloka kagesi, ukuwohloka kokushisa, ukukhishwa nezinye izinhlobo ngesikhathi esifanayo, futhi kunzima ukuhlukanisa ngokuphelele.Futhi i-AC voltage inyusa amathuba okuwohloka okushisayo ku-voltage ye-DC.Ngakho-ke, sikholelwa ukuthi i-AC ukumelana nokuhlolwa kwe-voltage iqine kakhulu kune-DC ukumelana nokuhlolwa kwe-voltage.Ekusebenzeni kwangempela, lapho kwenziwa ukuhlolwa kokumelana ne-voltage, uma i-DC isetshenziselwa ukuhlolwa kwe-voltage yokumelana, i-voltage yokuhlola idingeka ukuthi ibe phezulu kune-voltage yokuhlola yefrikhwensi yamandla we-AC.I-voltage yokuhlola ye-DC evamile ukumelana nokuhlolwa kwe-voltage iphindaphindwa ngo-K njalo ngevelu esebenzayo ye-voltage yokuhlola ye-AC.Ngokuhlolwa okuqhathanisayo, sinemiphumela elandelayo: emikhiqizweni yocingo neyekhebula, i-K engaguquki ingu-3;embonini yezindiza, i-K engaguquki ingu-1.6 kuya ku-1.7;I-CSA ngokuvamile isebenzisa u-1.414 emikhiqizweni yabantu.
A:I-voltage yokuhlola enquma isivivinyo sokumelana ne-voltage incike emakethe umkhiqizo wakho ozofakwa kuyo, futhi kufanele uhambisane namazinga okuphepha noma imithethonqubo eyingxenye yemithetho yokulawula ukungeniswa kwezwe.I-voltage yokuhlola nesikhathi sokuhlola sokuhlolwa kwe-voltage ye-standard sicaciswe ezingeni lokuphepha.Isimo esihle ukucela iklayenti lakho ukuthi likunikeze izidingo zokuhlola ezifanele.I-voltage yokuhlola yokuhlolwa kwe-voltage evamile imi kanje: uma i-voltage yokusebenza iphakathi kuka-42V no-1000V, i-voltage yokuhlola iyiphinda kabili i-voltage yokusebenza kanye no-1000V.Le voltage yokuhlola isetshenziswa iminithi elingu-1.Isibonelo, kumkhiqizo osebenza ku-230V, i-voltage yokuhlola ingu-1460V.Uma isikhathi sokufaka i-voltage sifinyezwa, i-voltage yokuhlola kufanele inyuswe.Isibonelo, izimo zokuhlola umugqa wokukhiqiza ku-UL 935:
| isimo | Isikhathi sokufaka isicelo (amasekhondi) | i-voltage esetshenzisiwe |
| A | 60 | 1000V + (2 x V) |
| B | 1 | 1200V + (2.4 x V) |
| V=i-voltage elinganiselwe ephezulu | ||
A:Umthamo we-Hipot Tester ubhekisele ekuphumeni kwayo kwamandla.Umthamo wesihloli se-voltage esimelana sinqunywa umthamo omkhulu wamanje ophumayo x umthamo omkhulu wokuphumayo.Isb:5000Vx100mA=500VA
A: Amandla alahlekile ento ehloliwe yisona sizathu esiyinhloko somehluko phakathi kwamanani akalwayo e-AC ne-DC amelana nokuhlolwa kwamandla kagesi.Lawa mandla alahlekile angase angakhokhiswa ngokugcwele lapho kuhlolwa nge-AC, futhi kuzoba khona okuqhubekayo okugeleza kulawa mandla alahlekile.Ngokuhlolwa kwe-DC, uma amandla adukile e-DUT eseshajwe ngokugcwele, okusalayo ukuvuza kwamanje kwe-DUT.Ngakho-ke, inani lamanje lokuvuza elikalwa i-AC ukumelana nokuhlolwa kwe-voltage kanye ne-DC ukumelana nokuhlolwa kwe-voltage kuzoba nokwehlukile.
IMPENDULO: Ama-insulators awenzi, kodwa empeleni cishe azikho izinto ezigqugquzelwayo ezingezona ngokuphelele.Kunoma iyiphi into evikelayo, lapho i-voltage isetshenziswa ngaphesheya kwayo, i-current ethile izohlala igeleza.Ingxenye esebenzayo yalokhu yamanje ibizwa ngokuthi ukuvuza kwamanje, futhi lesi simo sibizwa nangokuthi ukuvuza kwe-insulator.Ukuze kuhlolwe izinto zikagesi, amandla avuzayo asho okwamanje okwakhiwa indawo ezungezile ephakathi nendawo noma evalelayo phakathi kwezingxenye zensimbi ezinokuvaleka okuhlanganyelwe, noma phakathi kwezingxenye ezibukhoma nezingxenye ezisekelwe phansi lapho kungekho mandla kagesi afakwe iphutha.ukuvuza kwamanje.Ngokwezinga le-US UL, ukuvuza kwamandla okusebenza okungaqhutshwa kusukela ezingxenyeni ezifinyeleleka zempahla yasendlini, okuhlanganisa ama-capacitively couples currents.Ukuvuza kwamanje kuhlanganisa izingxenye ezimbili, ingxenye eyodwa yi-conduction yamanje I1 ngokusebenzisa ukumelana nokufakwa;enye ingxenye ukususwa kwamanje kwe-I2 ngokusebenzisa amandla asabalalisiwe, ukusabela kwe-capacitive kokugcina kungu-XC=1/2pfc futhi kuhambisana ngokuphambene nemvamisa yokuphakelwa kwamandla, kanye namandla asasazwayo akhuphuka ngobuningi.ukwanda, ngakho-ke ukuvuza kwamanje kuyanda ngokuvama kokunikezwa kwamandla.Isibonelo: usebenzisa i-thyristor ukuze unikeze amandla, izingxenye zayo ze-harmonic zandisa ukuvuza kwamanje.
A: Ukuhlolwa kwe-voltage ye-standard ukuthola ukuvuza kwamanje okugeleza kusistimu yokufaka into evivinywayo, bese usebenzisa i-voltage engaphezu kwe-voltage esebenzayo ohlelweni lokufakelwa;kuyilapho ukuvuza kwamandla wamanje (i-contact current) kuwukuthola ukuvuza kwamanje kwento ehlolwayo ngaphansi kokusebenza okuvamile.Linganisa ukuvuza kwamanje kwento elinganisiwe ngaphansi kwesimo esingesihle kakhulu (i-voltage, imvamisa).Kalula nje, ukuvuza kwamanje kokuhlolwa kwe-voltage okubekezelela amandla okuvuza kukalwa ngaphansi kwamandla angasebenzi, kanti amandla avuzayo (i-contact current) yimanje okuvuza okukalwa ngaphansi kokusebenza okuvamile.
A: Ngemikhiqizo ye-elekthronikhi yezakhiwo ezahlukene, ukukalwa kokuthinta okwamanje kunezidingo ezihlukene, kodwa ngokuvamile, i-touch current ingahlukaniswa ngokuthintana kwamanje kweGround Leakage Current, i-surface-to-ground contact current Surface to Line Leakage Current and surface. -kuya kulayini Ukuvuza Kwamanje Okuthathu kokuthinta Indawo yamanje kuya Ekuvuzeni Okuphezulu Ukuhlola kwamanje
IMP: Izingxenye zensimbi ezifinyeleleka kalula noma okuvalekile kwemikhiqizo ye-elekthronikhi yempahla ye-Class I kufanele futhi ibe nesekhethi ephansi njengesilinganiso sokuvikela ekushaqekeni kukagesi ngaphandle kokufaka ugesi okuyisisekelo.Kodwa-ke, sivamise ukuhlangana nabanye abasebenzisi abasebenzisa ngokungafanele izinto ze-Class I njengezinto ze-Class II, noma bakhiphe ngokuqondile itheminali yaphansi (GND) ekugcineni kokufaka kwamandla kwempahla ye-Class I, ngakho-ke kukhona izingozi ezithile zokuphepha.Noma kunjalo, kuwumthwalo womkhiqizi ukugwema ingozi kumsebenzisi ebangelwa yilesi simo.Yingakho ukuhlolwa kwamanje kokuthinta kwenziwa.
A: Ngesikhathi sokuhlolwa kwe-AC ukumelana ne-voltage, ayikho indinganiso ngenxa yezinhlobo ezahlukene zezinto ezihloliwe, ukuba khona kwamandla alahlekile ezintweni ezihloliwe, kanye nama-voltages okuhlola ahlukene, ngakho-ke akukho okujwayelekile.
A: Indlela engcono kakhulu yokunquma i-voltage yokuhlola ukuyibeka ngokuya ngemininingwane edingekayo ekuhlolweni.Ngokuvamile, sizosetha i-voltage yokuhlola ngokwezikhathi ezi-2 ze-voltage yokusebenza kanye no-1000V.Isibonelo, uma i-voltage yokusebenza yomkhiqizo ingu-115VAC, sisebenzisa u-2 x 115 + 1000 = 1230 Volt njenge-voltage yokuhlola.Vele, i-voltage yokuhlola izophinde ibe nezilungiselelo ezihlukile ngenxa yamabanga ahlukene wezendlalelo zokuvikela.
IMP: Lawa magama amathathu anencazelo efanayo, kodwa avame ukusetshenziswa ngokushintshana embonini yokuhlola.
A: Ukuhlolwa kokumelana ne-insulation kanye nokuhlolwa kwe-voltage kufana kakhulu.Faka amandla kagesi e-DC afika ku-1000V kumaphuzu amabili azohlolwa.Ukuhlolwa kwe-IR ngokuvamile kunikeza inani lokumelana kuma-megohm, hhayi ukumelwa kwe-Pass/Fail kusuka kuhlolo lwe-Hipot.Ngokuvamile, i-voltage yokuhlola ingu-500V DC, futhi inani le-insulation resistance (IR) akufanele libe ngaphansi kwama-megohms ambalwa.Ukuhlolwa kokumelana nokufakwa kwe-insulation kuwukuhlola okungabhubhisi futhi kungathola ukuthi ukugqumisa kuhle yini.Kwezinye izici, ukuhlolwa kokumelana nokufakwa kwe-insulation kwenziwa kuqala bese kulandela ukuhlolwa kwe-voltage.Lapho ukuhlolwa kokumelana nokufakwa kwe-insulation kwehluleka, ukuhlolwa kwe-voltage ye-standard kuvame ukuhluleka.
IMPENDULO: Ukuhlolwa kokuxhumeka phansi, abanye abantu bakubiza ngokuthi ukuhlolwa kokuqhubeka komhlaba (Ground Continuity), kukala ukuthintana phakathi kwerekhi yase-DUT nepali.Ukuhlolwa kwebhondi yaphansi kunquma ukuthi isifunda sokuvikela sase-DUT singakwazi yini ukumelana nephutha uma umkhiqizo wehluleka.Umhloli webhondi yaphansi uzokhiqiza umkhawulo wamanje ongu-30A DC wamanje noma we-AC rms wamanje (i-CSA idinga isilinganiso esingu-40A) ngesekhethi yaphansi ukuze inqume ukuthinteka kwesekethe yaphansi, ngokuvamile engaphansi kuka-0.1 ohms.
A: Ukuhlolwa kwe-IR ukuhlolwa kwekhwalithi okunikeza inkomba yekhwalithi ehlobene yesistimu yokuhlukanisa.Ivamise ukuhlolwa nge-DC voltage engu-500V noma engu-1000V, futhi umphumela ukalwa ngokumelana ne-megohm.Ukuhlolwa kwe-voltage ye-withstand nakho kusebenzisa amandla kagesi aphezulu kudivayisi evivinywayo (DUT), kodwa i-voltage esetshenzisiwe iphezulu kunaleyo yokuhlolwa kwe-IR.Kungenziwa ku-AC noma ku-DC voltage.Imiphumela ikalwa ngama-milliamp noma ama-microamp.Kwezinye izici, ukuhlolwa kwe-IR kwenziwa kuqala, kulandelwe ukuhlolwa kwe-voltage.Uma idivayisi ehlolwayo (DUT) yehluleka ukuhlolwa kwe-IR, idivayisi ehlolwayo (DUT) iphinda yehluleke ekuhlolweni kwe-voltage ye-standard ku-voltage ephezulu.
IMPENDULO: Injongo yokuhlolwa kwe-impedance yaphansi iwukuqinisekisa ukuthi intambo yaphansi evikelayo ingakwazi ukumelana nokugeleza kwamandla ukuze kuqinisekiswe ukuphepha kwabasebenzisi uma kwenzeka isimo esingavamile emkhiqizweni wesisetshenziswa.Ivolthi yokuhlola ejwayelekile yokuphepha idinga ukuthi amandla kagesi aphezulu esekethe evulekile akumele eqe umkhawulo ongu-12V, osuselwe ekucabangeni kokuphepha komsebenzisi.Uma ukwehluleka kokuhlolwa kwenzeka, opharetha angancishiswa abe sengozini yokushaqeka ngogesi.Izinga elijwayelekile lidinga ukuthi ukumelana nesisekelo kufanele kube ngaphansi kuka-0.1ohm.Kunconywa ukusebenzisa uhlolo lwamanje lwe-AC olunemvamisa engu-50Hz noma engu-60Hz ukuze kuhlangatshezwane nemvelo yangempela yokusebenza yomkhiqizo.
A: Kunomehluko othile phakathi kokuhlolwa kokumelana ne-voltage kanye nokuhlolwa kokuvuza kwamandla, kodwa ngokuvamile, lo mehluko ungafingqwa ngale ndlela elandelayo.Ukuhlolwa kwe-voltage okumelana nakho ukusebenzisa amandla kagesi aphezulu ukuze kucindezelwe ukuvaleka komkhiqizo ukuze kunqunywe ukuthi amandla okuvikela omkhiqizo anele yini ukuvimbela ukuvuza kwamanje okudlulele.Ukuhlolwa kwamanje kokuvuza ukukala amandla avuzayo ageleza kumkhiqizo ngaphansi kwezimo ezivamile nezinephutha elilodwa lokuphakelwa kwamandla lapho umkhiqizo usetshenziswa.
A: Umehluko ngesikhathi sokukhipha uncike kumandla wento ehloliwe kanye nesifunda sokukhipha somhloli we-voltage.Lapho i-capacitance iphezulu, isikhathi eside sokukhipha esidingekayo.
A: Amathuluzi e-Class I asho ukuthi izingxenye zekhondatha ezifinyelelekayo zixhunywe kukhondakta oyisivikelo ophansi;lapho ukufakwa okuyisisekelo kwehluleka, umqhubi wokuvikela ophansi kufanele akwazi ukumelana namandla amanje, okungukuthi, lapho ukufakwa okuyisisekelo kwehluleka, izingxenye ezifinyelelekayo azikwazi ukuba izingxenye zikagesi ezibukhoma .Kalula nje, okokusebenza okunephinikhodi yaphansi yentambo yamandla kuyithuluzi le-Class I.Imishini ye-Class II ayincikile kuphela "Ekugqumeni Okuyisisekelo" ukuze uvikeleke kugesi, kodwa futhi inikeza ezinye izinyathelo zokuphepha njengokuthi "I-Double Insulation" noma "I-Reinforced Insulation".Azikho izimo eziphathelene nokuthembeka kwesisekelo somhlaba esivikelayo noma izimo zokufakwa.
