Ama-Residual current breakers (RCCB), eyaziwa nangokuthi amadivayisi wamanje asele (i-RCD), amadivayisi okuphepha kagesi abalulekile adlala indima ebalulekile ekuvimbeleni ukushaqeka kukagesi kanye nemililo kagesi. Kulesi sihloko, sizohlola ukubaluleka kwama-RCCB, imisebenzi yawo nokuthi kungani eyingxenye ebalulekile yanoma yisiphi isifunda.
Okokuqala, kubalulekile ukuqonda ukuthi iyini i-RCCB nokuthi yenzani. I-RCCB iyithuluzi elivula ngokuzenzakalelayo isekethe lapho kutholakala ukuvuza kwamanje, ngaleyo ndlela linciphise ingozi yokushaqeka kukagesi. Isebenza ngokuqapha njalo ibhalansi yamanje egeleza ngezintambo eziphilayo nezingathathi hlangothi zesekethe. Noma yimuphi umehluko kule bhalansi, njengalapho ukuvuza kwamanje emhlabeni ngenxa yephutha noma ukuthintana komuntu nezingxenye eziphilayo, kubangela i-RCCB ukuthi inqamule ngokushesha ukunikezwa kukagesi, ivimbele ukushaqeka kukagesi okungaba yingozi.
Enye yezinzuzo eziyinhloko zama-RCCB yikhono lawo lokuvikela ekuthintaneni okuqondile nokungaqondile nezingxenye eziphilayo. Ukuthintana okuqondile kwenzeka lapho umuntu ethinta umqhubi ophilayo noma into kagesi enephutha; ukuxhumana okungaqondile kwenzeka lapho umuntu ethinta into eshajwe ngenxa yephutha. Kuzo zombili izimo, ama-RCCB anganciphisa ingozi ngokuphazamisa ngokushesha isekethe nokuvimbela ugesi ukuthi ungagelezi emzimbeni, ngaleyo ndlela kuncishiswe ubukhulu bokushaqeka.
Ngaphezu kwalokho, ama-RCCB ayasebenza ekuvimbeleni imililo kagesi. Ama-RCCB asiza ekunciphiseni izingozi zomlilo ngaphakathi kokufakwa kukagesi ngoba angathola ukuvuza okuncane okungabangela ukushisa ngokweqile futhi okungase kubangele umlilo. Lokhu kuwenza abe yingxenye ebalulekile ekuqinisekiseni ukuphepha kwabantu kanye nempahla.
Ngaphezu kwezinzuzo zokuphepha, ukusetshenziswa kwama-RCCB kuyadingeka kakhulu yimithetho nemithetho yokwakha emazweni amaningi. Lokhu kugcizelela ukubaluleka kokufaka ama-RCCB kuzo zonke izifunda, kungaba izindawo zokuhlala, zezentengiselwano noma zezimboni. Ukuthobela le mithetho akugcini nje ngokuqinisekisa ukuphepha kwabahlali, kodwa futhi kusiza ekunciphiseni umthwalo wemfanelo kubanikazi bezindawo kanye nabakhi bemishini kagesi.
Uma ukhetha i-RCCB, kubalulekile ukucabangela izidingo ezithile zokufakwa kukagesi. Kunezinhlobo ezahlukene zama-RCCB atholakalayo, kufaka phakathi izinketho ezinamazinga ahlukene okuzwela kanye nezici zokukhubeka. Isibonelo, ama-RCCB ohlobo lwe-AC aklanyelwe ngokuyinhloko ukuvikela kuma-current alternating sinusoidal, kuyilapho ama-RCCB ohlobo lwe-A enikeza ukuvikelwa okwengeziwe kuma-current e-DC ashaya ngamandla, okwenza afaneleke ukusetshenziswa kumasekethe emishinini kagesi noma kuma-drive ejubane eliguquguqukayo. Kubalulekile ukubonisana nochwepheshe kagesi noma unjiniyela ukuze anqume uhlobo lwe-RCCB olufaneleka kakhulu kuhlelo lokusebenza oluthile.
Kubalulekile ukuqaphela ukuthi ukuhlolwa njalo nokugcinwa kwama-RCCB kubalulekile ukuqinisekisa ukusebenza kwawo okuthembekile. Ukuhlolwa njalo kungasiza ekuboneni noma yiziphi izinkinga noma amaphutha angaba khona ku-RCCB, kuqinisekiswe ukuthi ihlala isebenza futhi isebenza kahle ekuhlinzekeni isivikelo. Ngaphezu kwalokho, kunconywa ukuthi i-RCCB ifakwe uchwepheshe kagesi onelayisensi ukuqinisekisa ukufakwa okufanele kanye nokuhambisana nemithethonqubo efanele.
Ngokufigqiwe,Ama-RCCBziyizingxenye zamasekethe kagesi ahlinzeka ngokuvikelwa okubalulekile ekushaqekeni kukagesi kanye nezingozi zomlilo. Ikhono lawo lokubona nokunqamula ngokushesha lapho kwenzeka iphutha liwenza abe yithuluzi lokuphepha elibalulekile ezindaweni zokuhlala nezentengiselwano. Njengoba kugcizelelwa kakhulu ukuphepha kukagesi kanye nokuhambisana nemithetho, ukubaluleka kwama-RCCB akunakugcizelelwa ngokweqile. Abanikazi bezindlu, osonkontileka bakagesi kanye nabantu ngabanye kumele baqaphele ukubaluleka kwama-RCCB futhi babeke phambili ukufakwa nokugcinwa kwawo ekufakweni kukagesi.
Isikhathi sokuthunyelwe: Disemba-21-2023