I-low-voltage circuit breaker yi-electric mechanical switch esetyenziselwa ukuthwala kunye nokuphula i-current circuit.Ngokwenkcazo yomgangatho wesizwe we-GB14048.2, i-low-voltage circuit breakers inokwahlulwa ibe yi-molded case circuit breakers kunye ne-frame circuit breakers.Phakathi kwabo, i-mold case circuit breaker ibhekisela kwi-breaker circuit igobolondo layo lenziwe ngezinto ezibunjiweyo zokugquma, kwaye zihlala zisebenzisa umoya njenge-arc yokucima umbane, ngoko ke ibizwa ngokuba yi-automatic air switch.
I-air circuit breaker ibhekisela kwi-breaker circuit enokuthi unxibelelwano luvulwe kwaye luvalwe emoyeni kuxinzelelo lwe-atmospheric.Ngokungafani nokutshintsha komoya, i-vacuum circuit breakers iphunyezwa ngokuvula kunye nokuvala oonxibelelwano kwi-tube ephezulu yokucoca.Kufuneka kuqatshelwe ukuba nangona i-low-voltage-molded case breakers zesekethe zidla ngokubizwa ngokuba yi-automatic air switches, iiswitshi kunye nabaphuli beesekethe ngokwenene zineengcamango ezimbini ezahlukeneyo.
I-low-voltage circuit breakers idla ngokusetyenziselwa ukuthwala kunye nokuphula i-current of circuit, kwaye inokwahlulwa ibe ziindidi ezimbini: i-molded case circuit breakers kunye ne-frame circuit breakers.I-mold case circuit breaker ikwayi-air circuit breaker, isebenzisa umoya njenge-arc yokucima umlilo.Izaphuli zesekethe ezibunjiweyo zinomthamo omncinci kwaye zilinganiswe ngokuqhawuka kwangoku kunezaphuli zesekethe zesakhelo, ngoko ke zikhuselwe yimeko yeplastiki.Izaphuli zeesekethe zesakhelo zinamandla amakhulu kunye nemigangatho ephezulu yokuqhekeka, ngokuqhelekileyo ayifuni i-enclosures zeplastiki, kwaye onke amacandelo afakwe kwisakhelo sentsimbi.Kwimeko yesiphaluka esifutshane okanye i-high current, i-breaker circuit inamandla okucima i-arc kwaye inokuhamba ngokuzenzekelayo, ngoko isetyenziselwa ukusebenzisa izixhobo zombane ezifana nokungaphumeleli kombane, ukuhanjiswa kwamandla, kunye nokucima kunye nokucima umthwalo.
Ukukhethwa kokutshintsha umoya kufuneka kumiselwe ngokwemeko yangempela.Kucetyiswa ukuba le miba ilandelayo ithathelwe ingqalelo xa ukhetha iswitshi yomoya:
1.Khetha ngokowona mandla asetyenziswayo kwikhaya ukunqanda ukukhubeka rhoqo ngenxa yomthwalo ongaphezu komsinga.
2. Khetha izaphuli zesekethe ezimfutshane ezahlukeneyo okanye izitshixo zomoya ngokwamandla ezixhobo zombane ezahlukeneyo ukunqanda ukukhubeka ngenxa yombane ogqithisileyo ngexesha lokuqalisa.
3.Khetha izikhuseli ze-1P zokuvuza kuzo zonke iisekethe zesebe ukuphucula ukhuseleko lwezixhobo zombane.
I-4.I-Partitioning kunye ne-branching, iindawo ezahlukeneyo zingahlulwa ngokwemigangatho okanye izixhobo zombane, ezilungele ukuphathwa nokugcinwa.Ngokuqhelekileyo, ukhetho lokutshintsha umoya kufuneka luqhutywe ngokwemeko yangempela.Ngokukodwa, uhlobo, amandla, ubuninzi kunye nezinye izinto zezixhobo zombane kufuneka ziqwalaselwe ukuqinisekisa ukuzinza kunye nokhuseleko lwezixhobo zombane.
Ukongeza kula manqaku angasentla, ezi zinto zilandelayo kufuneka ziqwalaselwe xa kuthengwa i-air switch: 6. Ukusetyenziswa kwendawo: Umlinganiselo olinganisiweyo we-air breaker uhambelana nokushisa kwendawo yokusetyenziswa.Ukuba ubushushu be-ambient buphezulu, i-current rated current ye-air breaker iya kuhla, ngoko ke i-air breaker kufuneka ikhethwe ngokwendawo yokusetyenziswa kwangempela.7. Ukuqina: Ukutshintsha umoya ngokuqhelekileyo kuqhutywe rhoqo, ngoko ke kuyimfuneko ukukhetha imveliso enomgangatho omhle kunye nokuqina okuqinileyo ukuphepha ukutshintshwa rhoqo kunye nokugcinwa.8. Udumo lweBrand: Xa kuthengwa i-compressors yomoya, kufuneka ukhethe ezo mveliso ze-brand ezinegama eliphezulu kunye nodumo oluhle ukuqinisekisa umgangatho kunye nenkonzo emva kokuthengisa.9. Ukuhambelana kwe-Brand: Ngaphantsi kokulungelelaniswa kwezixhobo zombane ezifanayo, kucetyiswa ukuba kusetyenziswe uphawu olufanayo lokutshintsha umoya ukuphepha ukudideka kunye nokuphazamiseka ngexesha lokusetyenziswa kunye nokugcinwa.10. Uncedo lofakelo kunye nokugcinwa lula: Xa ukhetha iswitshi yomoya, ukuba lula kokufakela kunye nokugcinwa kufuneka
Ixesha lokuposa: Jul-06-2023