safety extra-low voltage: voltage not exceeding 42 V between conductors and between conductors and earth, the no-load voltage not exceeding 50 V When safety extra-low voltage is obtained from the supply mains, it is to be through a safety isolating transformer or a convertor with separate windings, the insulation of which complies with double insulation…
i-voltage ephansi kakhulu: i-voltage ehlinzekwa isuka emthonjeni ongaphakathi kwento kagesi engeqi ku-50 V phakathi kwamakhondakta naphakathi kwamakhondakta nomhlaba lapho into esetshenziswayo inikezwa nge-voltage elinganiselwe I-voltage ephumayo yamabhethri ajwayelekile e-alkaline asendlini, i-voltage esebenzayo yesekethe ye-voltage ephansi ngemva kwe-transformer noma isekethe eyehlayo ye-RC ebhodini lesekethe yokulawula yezinto zikagesi ezijwayelekile zasendlini, konke okungachazwa ngokuthi amandla kagesi aphansi kakhulu….
ibanga le-creepage: ibanga elifushane kakhulu endaweni yokufakwa phakathi kwezingxenye ezimbili ze-conductive noma phakathi kwengxenye ye-conductive nendawo efinyelelekayo. Izinkokhelo zingasakazwa ngendlela eqondisayo emoyeni, ngaleyo ndlela zenze umsinga. Lona incazelo yokukhishwa. Izindleko zingase futhi zisakaze ngokusebenzisa impahla yokuvikela uqobo, ngoba akukho mpahla evalwe ngokuphelele. Umehluko wamanje owakheke phakathi kwama-electrode amabili lapho ama-electrode amabili anamandla ahlukene esetshenziswa ezinhlangothini…
clearance: ibanga elifushane emoyeni phakathi kwezingxenye ezimbili ze-conductive noma phakathi kwengxenye ye-conductive kanye ne-indawo efinyelelekayo. Ukuhlanzeka kuwumqondo obaluleke kakhulu. Ukuze siqonde imvume, sidinga ukuphinda sikusho ukuthi akukho lutho oluvalwe ngokuphelele, futhi umoya ungaqhuba nogesi. Lapho i-voltage iphezulu kakhulu, i-current izoqhutshwa emoyeni. Ukushaywa kombani ngesikhathi sokuduma kwezulu kuyisibonelo esivamile sombani oshaya emoyeni. I-voltage yombani iphezulu kakhulu,…
ukwakhiwa kwesigaba III: ingxenye yesisetshenziswa esivikela ukushaqeka kukagesi sincike ekuphepheni kwamandla kagesi aphansi kakhulu nalapho ama-voltage aphezulu kunalawo okuphepha kwamandla kagesi aphansi kakhulu angakhiqizi.Qaphela ukwahlukanisa okuyisisekelo kungase kudingeke ngaphezu kokuphakelwa kwa-SELV. Bheka ku-8.1.4.QAPHELA 2 Uma ingxenye eyinhloko yomshini isebenza e-SELV futhi ilethwa kanye neyunithi yokuphakelwa kukagesi ekhiphekayo khona-ke le ngxenye eyinhloko yale ngxenye eyinhloko ibhekwa…
Into esetshenziswayo yesigaba III: into esetshenziswayo lapho ukuvikeleka kokushaqiswa kukagesi kuncike ekunikezeni amandla kagesi aphansi kakhulu futhi lapho ama-voltage aphezulu kunalawo okuphepha kwamandla kagesi aphansi kakhulu angakhiqizi.QAPHELA Ukufakwa okuyisisekelo kungase kudingeke ngaphezu kokuhlinzekwa kwa-SELV. Bheka ku-8.1.4. Ukuze uqonde lokhu, udinga ukuqonda kuqala ukuthi yini ukuphepha kwamandla kagesi aphansi kakhulu(SELV). Sicela ubheke incazelo kanye nencazelo ye-SELV….
Ukugcizelelwa lapha kuyingxenye yokwakhiwa kwento esebenza ngogesi, engahlangabezana nezidingo zokufakwa okuphindwe kabili noma ukufakwa okuqinisiwe. Ngakho-ke, into esetshenziswayo Yekilasi I futhi izoqukatha ukwakhiwa Kwekilasi II .Isibonelo: Ihhavini eboniswe emfanekisweni ongezansi isebenzisa igobolondo lensimbi kanye nephini lokushintsha lepulasitiki. Uma umsebenzisi ethinta inkinobho yokushintsha, ifindo lenziwe ngezinto ezivikelayo futhi alikwazi ukumiswa. Ukuvikela ngokumelene nokushaqeka kukagesi kungancika kuphela…
Into esetshenziswayo yekilasi II: into esetshenziswayo lapho ukuvikeleka kokushaqeka kukagesi kungancikile insulation eyisisekelo kuphela kodwa lapho kunikezwa khona izinyathelo zokuphepha ezengeziwe, njengokuthi double insulation noma reinforced insulation, akukho ukuhlinzekwa komhlaba ovikelayo noma ukuthembela ezimeni zokufakwa. QAPHELA 1 Isisetshenziswa esinjalo singaba ngolunye kulezi zinhlobo ezilandelayo:– into esetshenziswayo enendawo evalekile ehlala isikhathi eside neqhubekayo yezinto ezivalelayo ezimboza…
umshini kagesi wesigaba I: umshini lapho ukuvikeleka kokushaqeka kukagesi kungancikile ekufakeni izinto eziyisisekelo kuphela kodwa okuhlanganisa nesexwayiso sokuphepha esengeziwe, ngokuthi izingxenye ezifinyelelekayo eziqhutshwayo zixhunywe ku-conductor yomhlaba ovikelayo kuzintambo ezingaguquki zokufakwa ngaleyo ndlela. ukuthi izingxenye ezifinyelelekayo azikwazi ukuba bukhoma uma kwenzeka ukwehluleka kokufakwa okuyisisekeloQAPHELA Lokhu kunikezwa kuhlanganisa i-conductor yomhlaba evikelayo entanjeni yokuhlinzeka. Isibonelo: Ngokuyisisekelo, izinto ezisetshenziswayo…
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