Intambamyi zumuzunguruko (GFCIs) zimaze imyaka irenga 40 zikoreshwa, kandi zerekanye ko ari ntangarugero mukurinda abakozi ingaruka ziterwa n’umuriro.Ubundi bwoko bwibikoresho byo kumeneka hamwe nubutaka bwibikoresho byo kurinda byatangijwe kubikorwa bitandukanye kuva GFCIs yatangizwa.Gukoresha ibikoresho bimwe na bimwe birinda birasabwa cyane cyane muri National Electric Code® (NEC) ®.Abandi nibigize ibikoresho, nkuko bisabwa na UL igipimo gikubiyemo ibyo bikoresho.Iyi ngingo izafasha gutandukanya ubwoko butandukanye bwibikoresho bikingira bikoreshwa muri iki gihe no gusobanura imikoreshereze yabyo.
GFCI
Igisobanuro cyumuzunguruko wumuzunguruko wubutaka kiri mu ngingo ya 100 ya NEC kandi ni ubu bukurikira: “Igikoresho kigamije kurinda abakozi bakora kugirango batange ingufu zumuzunguruko cyangwa igice cyacyo mugihe cyagenwe mugihe a kugeza ubu ku butaka burenze indangagaciro zashyizweho ku gikoresho cyo mu rwego rwa A. ”
Ukurikije iki gisobanuro, Icyitonderwa cyamakuru gitanga amakuru yinyongera kubikoresho bigize urwego A GFCI.Ivuga ko Urwego A GFCI rugenda mugihe ikigezweho kubutaka gifite agaciro murwego rwa 4 milliamps kugeza kuri 6 milliamps, hamwe na UL 943, Standard for Safety for Ground- Fault Circuit-Interrupters.
Igice cya 210.8 cya NEC gikubiyemo porogaramu zihariye, haba mu gutura no mu bucuruzi, aho bisabwa kurinda GFCI ku bakozi.Mu bice byo guturamo, GFCI irasabwa muri volt zose uko ari 125, icyiciro kimwe, 15- na 20-ampere yakira yashyizwe ahantu nko mu bwiherero, igaraje, hanze, hasi yo hasi ituzuye, nigikoni.Ingingo ya 680 ya NEC ikubiyemo ibidendezi byo koga ifite ibisabwa bya GFCI.
Hafi ya buri gitabo gishya cya NEC kuva 1968, hiyongereyeho ibisabwa bishya bya GFCI.Reba imbonerahamwe ikurikira kurugero rwigihe NEC yabanje gusaba GFCIs kubikorwa bitandukanye.Nyamuneka menya ko urutonde rutarimo ahantu hose hakenewe uburinzi bwa GFCI.
UL Ubuyobozi Ibisobanuro kubutaka-Amakosa Yumuzunguruko (KCXS) urashobora kubisanga mubicuruzwa bya UL iQ ™.
Ubundi bwoko bwa Leakage Ibiriho hamwe nubutaka bwibikoresho bikingira:
GFPE.Ubu bwoko bwibikoresho bwateguwe muburyo bwo gutembera muri 30 mA cyangwa murwego rwo hejuru, bityo ntibukoreshwa mukurinda abakozi.
Ubu bwoko bwibikoresho bushobora gutangwa nkuko bisabwa na NEC Igice cya 210.13, 240.13, 230.95, na 555.3.UL kuyobora amakuru kubutaka-Amakosa yo Kumva no Kwifashisha Ibikoresho urashobora kubisanga munsi yicyiciro cya UL KDAX.
LCDI (Leakage Current Detector Interrupter) LCDI yemerewe kumurongo umwe wicyuma- hamwe nu byuma bifata ibyuma bifata ibyuma bikonjesha ibyumba bikurikije ingingo ya 440.65 ya NEC.LCDI inteko itanga amashanyarazi ikoresha umugozi udasanzwe ukoresha ingabo ikikije abayobora kugiti cyabo, kandi igenewe guhagarika uruziga mugihe imiyoboro yamenetse ibaye hagati yumuyobozi ningabo.UL kuyobora amakuru ya Leakage-Ibiriho Kumenyekanisha no Guhagarika urashobora kubisanga munsi yicyiciro cya UL ELGN.
EGFPD.Iki gikoresho gikora kugirango uhagarike umuyagankuba uturuka kumasoko yatanzwe mugihe amashanyarazi-yubutaka arenze urwego rwo gukuramo amakosa rwerekanwe kubikoresho, mubisanzwe mA 6 kugeza kuri 50 mA.UL iyobora amakuru kubikoresho bikingira-Impamvu ushobora kubisanga munsi yicyiciro cya UL FTTE.
ALCIs na IDCIs
Ibi bikoresho ni UL Ibigize bizwi, kandi ntibigenewe kugurishwa muri rusange cyangwa gukoresha.Zigenewe gukoreshwa nkibikoresho byateranijwe mu ruganda rwibikoresho byihariye aho bikwiriye kugenwa na UL.Ntabwo bakoze iperereza kugirango bashyirwe mu murima, kandi barashobora cyangwa ntibujuje ibisabwa muri NEC.
ALCI.ALCI ntabwo igamije gusimbuza ikoreshwa ryigikoresho cya GFCI, aho uburinzi bwa GFCI busabwa hakurikijwe NEC.
IDCI.Iyo isukari itwara ibintu yinjiye mubikoresho hanyuma igahuza igice kizima hamwe na sensor y'imbere, igikoresho kigenda iyo umuvuduko uri hagati yigice kizima na sensor irenze urugendo rwubu.Urugendo rwurugendo rushobora kuba agaciro kari munsi ya 6 mA ihagije kugirango umenye kwibiza ibikoresho byahujwe.Imikorere ya IDCI ntabwo iterwa no kuba hari ikintu gifatika.
Igihe cyo kohereza: Nzeri-05-2022