Umahluko phakathi kwe-MCB kunye ne-RCCB

I-breaker circuit: inokutshintsha, iqhube kwaye iphule ikhoyo ngoku phantsi kweemeko zesekethe eziqhelekileyo, inokutshintshelwa phantsi kweemeko zesekethe ezingaqhelekanga, zithwale ixesha elithile kwaye ziphule umbane wokutshintsha komatshini.

I-Micro Circuit Breaker, ebizwa ngokuba yi-MCB (i-Micro Circuit Breaker), yeyona nto isetyenziswa kakhulu kwi-terminal yokukhusela izixhobo zombane ekwakheni izixhobo zombane zombane.Isetyenziselwa isigaba esisodwa kunye nesigaba sesithathu sesiphaluka esifutshane, ukugqithiswa kunye nokukhuselwa kwe-overvoltage ngaphantsi kwe-125A, kubandakanywa neentlobo ezine ze-pole-pole 1P, i-2-pole 2P, i-3-pole 3P kunye ne-4P-pole 4P.

I-micro circuit breaker iquka indlela yokusebenza, umnxeba, isixhobo sokukhusela (izixhobo ezahlukeneyo zokukhulula), inkqubo yokucima i-arc, njl.Emva kokuba uqhagamshelwano oluphambili luvaliwe, indlela yohambo lwasimahla itshixa umfowunelwa oyintloko kwindawo yokuvala.I-coil yokukhutshwa kwe-overcurrent kunye ne-thermal element yokukhutshwa kwe-thermal idibaniswe kwisiphaluka esiphambili kwichungechunge, kwaye i-coil yokukhutshwa kwe-undervoltage ixhunywe kumandla ombane ngokufanayo.Xa isiphaluka senzeka isiphaluka esifutshane okanye umthwalo onzima, i-armature yesixhobo sohambo oludlulayo siyatsala, okwenza indlela yohambo lwasimahla lusebenze, kwaye uqhagamshelwano oluphambili luqhawula unxibelelwano oluphambili.Xa isekethe igcwele kakhulu, ubushushu besixhobo sohambo lwe-thermal lufudumeza ukugoba ishidi le-bimetal kwaye lityhale indlela yohambo lwasimahla ukuba lusebenze.Xa isiphaluka siphantsi kwe-voltage, i-armature ye-relender undervoltage ikhululwa.Kwakhona ivumela indlela yohambo lwasimahla ukuba isebenze.

I-Residual current circuit-breaker: I-switch esebenza ngokuzenzekelayo xa i-residual current kwi-circuit idlula ixabiso elisetyenzisiweyo.Izaphuli zesekethe ezisetyenziswa ngokuqhelekileyo zahlulwe zibe ngamacandelo amabini: uhlobo lwevolthi kunye nodidi lwangoku, kwaye uhlobo lwangoku lwahlulwe lwaba ludidi lwe-electromagnetic kunye nohlobo lombane.Ukuvuza kweesekethe zesekethe zisetyenziselwa ukuthintela ukothuka komntu, kwaye kufuneka zikhethwe ngokweemfuno ezahlukeneyo zokunxibelelana ngokuthe ngqo kunye nokukhuselwa koqhagamshelwano olungathanga ngqo.

Khetha ngokwenjongo yokusetyenziswa kunye nendawo apho izixhobo zombane zikhoyo

1) Ukukhuselwa ekudibaneni ngokuthe ngqo nokutshatyalaliswa kombane

Ngenxa yokuba ingozi yombane woqhagamshelwano ngokuthe ngqo inkulu, iziphumo zinzima, ngoko ke ukukhetha i-breaker circuit evuzayo enovakalelo oluphezulu, izixhobo zombane, izixhobo zombane eziphathwayo kunye nemigca yethutyana kufuneka ifakwe kwi-loop yokusebenza yangoku ye-30mA, ixesha lokusebenza ngaphakathi kwe-0.1s ukuvuza i-breaker circuit.Kwizindlu zokuhlala ezinezixhobo ezininzi zendlu, kukulungele ukuyifaka emva kokungena kwimitha yamandla yendlu.

Ukuba kanye ukutshitshiswa kombane kulula ukwenza umonakalo wesibini (njengokusebenza kwindawo ephakamileyo), i-breaker circuit breaker kunye ne-operating current ye-15mA kunye nexesha lokusebenza ngaphakathi kwe-US kufuneka ifakwe kwi-loop.Kwizixhobo zonyango zombane ezibhedlele, ii-breaker circuit ezivuzayo ezine-6mA yokusebenza kunye nexesha lokusebenza ngaphakathi kwe-US kufuneka zifakwe.

2) Ukukhuselwa koqhagamshelwano olungathanga ngqo

Ukuqhawuka kombane ngokungathanga ngqo kwiindawo ezahlukeneyo kunokubangela amanqanaba ahlukeneyo okwenzakala emntwini, ngoko ke ii-breaker circuit breakers ezahlukeneyo zokuvuza kufuneka zifakwe kwiindawo ezahlukeneyo.Kuyafuneka ukuba kusetyenziswe izaphuli zesekethe ezivuzayo ezinovakalelo oluphezulu ngokwentelekiso kwiindawo apho ukothuka kombane kuyingozi kakhulu.Kwiindawo ezimanzi kuneendawo ezomileyo umngcipheko wokothuka kombane mkhulu kakhulu, ngokuqhelekileyo kufuneka kufakwe umsinga osebenzayo we-15-30mA, ixesha lokusebenza ngaphakathi kwe-0.1s i-breaker circuit breaker.Kwizixhobo zombane emanzini, isenzo kufuneka sifakwe.I-breaker circuit breaker kunye ne-6-l0mA yangoku kunye nexesha lokusebenza ngaphakathi kwe-US.Kwizixhobo zombane apho umqhubi kufuneka eme phezu kwentsimbi okanye kwisingxobo sentsimbi, okoko nje amandla ombane angaphezulu kwe-24V, i-breaker circuit evuzayo enombane osebenza ngaphantsi kwe-15mA kunye nexesha lokusebenza ngaphakathi kwe-US kufuneka ifakwe.Kwizixhobo zombane ezisisigxina kunye ne-voltage ye-220V okanye i-380V, xa ukuchasana komhlaba kwendlu kungaphantsi kwe-500fZ, umatshini omnye unokufaka i-breaker circuit breaker kunye ne-current yokusebenza ye-30mA kunye nexesha lokusebenza le-0.19.Kwizixhobo ezinkulu zombane ezinomlinganiselo olinganisiweyo ongaphezu kwe-100A okanye isiphaluka sombane esinezixhobo ezininzi zombane, i-breaker circuit breaker kunye ne-current yokusebenza ye-50-100mA inokufakwa.Xa ukuchasana kokumisa izixhobo zombane kungaphantsi kwe-1000, i-breaker circuit evuzayo kunye ne-current yokusebenza ye-200-500mA inokufakwa.