Amadivayisi wokuvikela ukuthi ungakhetha kanjani
Njengoba wonke umuntu azi, amadivaysi okuvikela ukukhuphuka noma okokuvikela amadivayisi (SPD) avikela imishini kagesi emithanjeni eyeqile ebangelwa umbani. Lokho kusho, akulula ngaso sonke isikhathi ukwazi ukuthi yikuphi okumele ukhethe.
Ukukhetha isiboshwa esifanele sokukhuphuka kanye nabahlaseli besekethe abavikelayo kubandakanya ukucubungula imingcele ehlukahlukene ehlobene nezinhlobo zamadivayisi wokuvikela ukuqhuma, amalungiselelo wesifunda, kanye nokuhlolwa kobungozi.
Ake sizame ukubona izinto ngokucacile…
Thumela ifomu, uthole okuningi mayelana nedivayisi yokuvikela (i-Circuit Breaker noma i-Fuse) ehlotshaniswa ne-Surge Protective Device.
Okokuqala, amazinga amanje achaza izigaba ezintathu zamadivayisi wokuvikela ukufakwa kwamandla kagesi anamandla aphansi:
Yimaphi amadivayisi wokuvikela ukuqhuma okufanele akhethwe futhi kufanele afakwe kuphi?
Ukuvikelwa kombani kufanele kusondele kumbono jikelele. Ngokuya ngesicelo (izitshalo ezinkulu zezimboni, izikhungo zedatha, izibhedlela, njll.), Indlela yokuhlola ubungozi kufanele isetshenziswe ukuqondisa ekukhetheni ukuvikelwa okuhle (uhlelo lokuvikela umbani, okokuvikela amadivayisi). Imithethonqubo kazwelonke, ngaphezu kwalokho, ingenza kube yimpoqo ukusebenzisa i-EN 62305-2 ejwayelekile (Ukuhlolwa Kobungozi).
Kwezinye izimo (izindlu, amahhovisi, izakhiwo ezingazweli ezingcupheni zezimboni), kulula ukwamukela le mfundo elandelayo yokuvikela:
Kuzo zonke izimo, kuzofakwa ithuluzi lokuvikela lokuvikela lohlobo lwe-2 ebhodini lokungena elingenayo lokuphela kukagesi. Ngemuva kwalokho, kufanele kuhlolwe ibanga phakathi kwaleyo divayisi yokuvikela imishini nemishini okufanele ivikelwe. Uma leli banga lidlula amamitha angama-30, kufanele kufakwe enye into yokuvikela (Uhlobo 2 noma Uhlobo 3) eduzane nemishini.
Futhi ukukalwa kwamadivayisi wokuvikela ukuqhuma?
Ngemuva kwalokho, ubukhulu bezinsimbi zokuvikela uhlobo lwe-Type 2 buxhomeke kakhulu endaweni yokuchayeka (okulingene, okuphakathi, okuphezulu): kunezindlela ezahlukahlukene zokukhipha isigaba ngasinye salezi (Imax = 20, 40, 60 kA (8 / 20μs)).
Kumadivayisi wokuvikela wohlobo loku-1, imfuneko encane amandla okukhipha i-Iimp = 12.5 kA (10 / 350μs). Amanani aphezulu angadingeka ngokuhlolwa kobungozi lapho okuceliwe kucelwa.
Ungawakhetha kanjani amadivayisi wokuvikela ahlobene namadivayisi wokuvikela wokuqhuma?
Ekugcineni, idivayisi yokuvikela ehlotshaniswa nedivayisi yokuvikela ukuqhuma (i-circuit breaker noma i-fuse) izokhethwa ngokuya nge-short-circuit current endaweni yokufakwa. Ngamanye amagama, ngebhodi lokushintsha ugesi, idivaysi yokuvikela ene-ISC <6 kA izokhethwa.
Okwezicelo zehhovisi, iSC imvamisa <20 kA.
Abakhiqizi kumele banikeze itafula lokuxhumana phakathi kwedivayisi yokuvikela yokwanda kanye nedivayisi yokuvikela ehambisanayo. Imishini evikela ngokwengeziwe isivele ifaka le divayisi endaweni efanayo.
Umgomo wokukhetha owenziwe lula (ngaphandle kokuhlolwa okuphelele kobungozi)
