ISaphuli seSekethe sokuvuza koMhlaba (ELCB)

Kwintsimi yokhuseleko lombane, esinye sezixhobo eziphambili ezisetyenziswayo yi-Earth Leakage Circuit Breaker (ELCB). Esi sixhobo sibalulekileyo sokhuseleko senzelwe ukuthintela ukothuka kunye nemililo yombane ngokubeka iliso kwi-current equkuqelayo kwisekethe kwaye ivale xa kubhaqwa i-voltage eyingozi. Kule bhlog, siza kujonga ngakumbi ukuba yintoni i-ELCB kwaye isigcina njani sikhuselekile.

I-ELCB sisixhobo sokhuseleko esisetyenziselwa ukufaka izixhobo zombane kunye ne-impedance yomhlaba ophezulu ukuphepha ukutshitshiswa kombane. Isebenza ngokuchonga ii-voltage ezincinci ezilahlekileyo kwizixhobo zombane ezikwiindawo ezivaliweyo zentsimbi kunye nokuphazamisa isekethe xa kubhaqwa umbane oyingozi. Eyona njongo yayo kukuthintela abantu kunye nezilwanyana ukuba bangonakaliswe kukubethwa ngumbane.

Umgaqo wokusebenza we-ELCB ulula kakhulu. Ibeka iliso ukungalingani kwangoku phakathi kwabaqhubi besigaba kunye nomqhubi ongathathi hlangothi. Ngokuqhelekileyo, i-current flowing through the phase conductors and current flowing through the neutral conductor should be equal. Nangona kunjalo, ukuba impazamo iyenzeka, njengangenxa yocingo olungalunganga okanye ukugquma okubangela ukuba umsinga uvuze emhlabeni, ukungalingani kuya kwenzeka. I-ELCB ibona oku kungalingani kwaye inqumla ngokukhawuleza ukunikezelwa kwamandla ukukhusela nawuphi na umonakalo.

Kukho iindidi ezimbini zee-ELCBs: ii-ELCB ezisebenza ngombane kunye nee-ELCB ezisebenza ngoku. I-ELCBs esebenza nge-voltage isebenza ngokuthelekisa igalelo kunye nemveliso, ngelixa ii-ELCB ezisebenza ngoku zisebenzisa i-transformer ye-toroidal ukubona nayiphi na ukungalingani kwi-current flowing through the phase and neutral conductors. Zombini iintlobo zifumanisa ngokufanelekileyo kwaye ziphendule kwiimpazamo zombane eziyingozi.

Kubalulekile ukuba uqaphele ukuba ii-ELCBs zihluke kwii-breaker circuits zendabuko, ezenzelwe ukukhusela ukugqithisa kunye neesekethe ezimfutshane. Ngelixa abaphuli beesekethe basenokungasoloko bebona iimpazamo ezikwinqanaba elisezantsi, ii-ELCBs zenzelwe ngokukodwa ukuphendula kumbane omncinci olahlekileyo kunye nokukhusela ngokuchasene nombane.

Isishwankathelo, i-earth leakage circuit breaker (ELCB) sisixhobo esibalulekileyo sokhuseleko esidlala indima ebalulekileyo ekuthinteleni ukutshitshiswa kombane kunye nomlilo wombane. Ngokubeka iliso ukuhamba kwangoku kunye nokuphendula naluphi na ukungalingani okanye iphoso, i-ELCB iyakwazi ukuvala ngokukhawuleza amandla kunye nokukhusela nayiphi na ingozi enokubakho kubantu nakwizilwanyana. Njengoko siqhubeka sibeka phambili ukhuseleko ekhaya nasemsebenzini, kubalulekile ukuqonda ukubaluleka kwee-ELCBs kunye nendlela ezisebenza ngayo.