Isigaba sesi-3 – Iqondwa kanjani incazelo “yokwakhiwa kwesigaba III”
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 njengeyokwakhiwa kwesigaba III kumshini wezinto zikagesi wekilasi I noma into esetshenziswayo yesigaba II ngokufanelekile.
Nalapha futhi, kugcizelelwa ingxenye yomshini. Incazelo yeNothi 1 iqine kakhulu, ngoba incazelo lapha ibeka ukuphepha kwamandla kagesi aphansi kakhulu, kodwa ukuphepha kwamandla kagesi aphansi kakhulu kuyingxenye nje engathintwa uma ihlangabezana nezimfuneko ze-8.1.4.
I-adaptha inikwa amandla i-adaptha exhunywayo (ngaphandle kokufakwa okuyisivikelo), futhi i-adaptha nento esetshenziswayo kulethwa kumsebenzisi ndawonye. I-adaptha nento esetshenziswayo zibhekwa njengezinto zikagesi ze-Class II. Ngenxa yokuthi i-adaptha iyi-Class II, lokhu kunquma isigaba sokuvikela ngokumelene nokushaqeka kukagesi. Kodwa-ke, into esetshenziswayo – ifeni iyodwa iwukwakhiwa kwe-Class III, okuwukwakhiwa kwe-Class III kumshini wokusebenza we-Class II.
Impela, kunesinye isimo, okungukuthi, i-PCB yokunikeza amandla okushintsha ishumekwe entweni esetshenziswayo, futhi le switch power supply PCB inganikeza isekethe ye-SELV. Bese, ingxenye yesekethe ye-SELV ihlanganisa ukwakhiwa kwesigaba II
Qaphela ukwahlukanisa okuyisisekelo kungase kudingeke ngaphezu kokuphakelwa kwa-SELV. Bheka ku-8.1.4.
Nalapha futhi, kugcizelelwa ingxenye yomshini. Incazelo yeNothi 1 iqine kakhulu, ngoba incazelo lapha ibeka ukuphepha kwamandla kagesi aphansi kakhulu, kodwa ukuphepha kwamandla kagesi aphansi kakhulu kuyingxenye nje engathintwa uma ihlangabezana nezimfuneko ze-8.1.4.
I-adaptha inikwa amandla i-adaptha exhunywayo (ngaphandle kokufakwa okuyisivikelo), futhi i-adaptha nento esetshenziswayo kulethwa kumsebenzisi ndawonye. I-adaptha nento esetshenziswayo zibhekwa njengezinto zikagesi ze-Class II. Ngenxa yokuthi i-adaptha iyi-Class II, lokhu kunquma isigaba sokuvikela ngokumelene nokushaqeka kukagesi. Kodwa-ke, into esetshenziswayo – ifeni iyodwa iwukwakhiwa kwe-Class III, okuwukwakhiwa kwe-Class III kumshini wokusebenza we-Class II.
Impela, kunesinye isimo, okungukuthi, i-PCB yokunikeza amandla okushintsha ishumekwe entweni esetshenziswayo, futhi le switch power supply PCB inganikeza isekethe ye-SELV. Bese, ingxenye yesekethe ye-SELV ihlanganisa ukwakhiwa kwesigaba II