Umehluko phakathi kwe-MCB ne-RCCB

I-circuit breaker: ingavula, iphathe futhi iphule i-current ngaphansi kwezimo ezijwayelekile zesekethe, ingavulwa ngaphansi kwezimo zesekethe ezishiwo ezingajwayelekile, iphathe isikhathi esithile futhi iphule amandla amanje okushintsha komshini.

I-Micro Circuit Breaker, ebizwa ngokuthi i-MCB (I-Micro Circuit Breaker), iyimishini kagesi evikela isiphetho esetshenziswa kakhulu ekwakheni amadivaysi kagesi okusabalalisa amatheminali.Isetshenziselwa umjikelezo omfishane wesigaba esisodwa nesigaba sesithathu, ukuvikela ukulayishwa ngokweqile kanye nokuvikelwa kwe-overvoltage ngaphansi kuka-125A, okuhlanganisa izinhlobo ezine ze-single-pole 1P, i-2-pole 2P, i-3-pole 3P kanye ne-4-pole 4P.

I-micro circuit breaker iqukethe indlela yokusebenza, othintana naye, idivayisi yokuvikela (imishini ehlukene yokukhulula), isistimu yokucisha i-arc, njll. Othintana naye oyinhloko uqhutshwa mathupha noma uvalwe ngogesi.Ngemva kokuba oxhumene naye oyinhloko evaliwe, indlela yohambo lwamahhala ikhiya othintana naye oyinhloko endaweni yokuvala.Ikhoyili yokukhululwa kwe-overcurrent kanye ne-thermal element yokukhululwa kwe-thermal zixhunywe kumjikelezo oyinhloko ochungechungeni, futhi ikhoyili yokukhishwa kwe-undervoltage ixhunywe kumthombo wamandla ngokuhambisana.Uma isifunda senzeka isekethe emfushane noma ukugcwala okukhulu, i-armature yedivayisi yohambo lwe-overcurrent iyadonsa, okwenza indlela yohambo lwamahhala isebenze, futhi othintana naye oyinhloko unqamula isekethe enkulu.Uma isifunda sigcwele kakhulu, ingxenye yokushisa yedivayisi yohambo olushisayo iyashisa ukuze igobe ishidi le-bimetal futhi isunduze indlela yohambo lwamahhala ukuze isebenze.Uma isifunda singaphansi kwe-voltage, i-armature yesikhiphi se-undervoltage siyakhululwa.Futhi ivumela indlela yohambo lwamahhala ukuthi isebenze.

Isinqamuli sesekethe esisele: Iswishi esebenza ngokuzenzakalelayo lapho amandla asalayo kusekethe edlula inani elisethiwe.Ama-breaker circuit okuvuza asetshenziswa ngokuvamile ahlukaniswe izigaba ezimbili: uhlobo lwe-voltage kanye nohlobo lwamanje, futhi uhlobo lwamanje luhlukaniswe ngohlobo lwe-electromagnetic kanye nohlobo lwe-elekthronikhi.Ama-circuit breaker avuzayo asetshenziselwa ukuvimbela ukushaqeka komuntu siqu, futhi kufanele akhethwe ngokuvumelana nezidingo ezahlukene zokuxhumana okuqondile nokuvikelwa kokuxhumana okungaqondile.

Khetha ngokwenhloso yokusetshenziswa kanye nendawo lapho izinto zikagesi zitholakala khona

1) Ukuvikelwa ekuthinteni okuqondile nokushaqeka kukagesi

Ngenxa yokuthi ukulimala kokuthintana nogesi okuqondile kukhulu uma kuqhathaniswa, imiphumela mibi kakhulu, ngakho-ke ukukhetha i-breaker circuit evuzayo ezwela kakhulu, kumathuluzi kagesi, izinto zokusebenza zikagesi ohambahambayo kanye nemigqa yesikhashana, kufanele kufakwe ku-loop yokusebenza yamanje engu-30mA, isikhathi sokusebenza ngaphakathi kwe-0.1s ukuvuza kwe-circuit breaker.Emakhaya okuhlala anemishini eminingi yasendlini, kungcono ukuyifaka ngemva kokungena kumitha yamandla yasendlini.

Uma uma ukushaqeka kukagesi kulula ukudala umonakalo wesibili (njengokusebenza endaweni ephakeme), isiphazamisi esivuzayo esinomshini wokusebenza ongu-15mA kanye nesikhathi sokusebenza ngaphakathi kwe-US kufanele kufakwe kuluphu.Okokusebenza kukagesi kwezokwelapha ezibhedlela, ama-circuit breaker avuzayo anamanje osebenzayo we-6mA kanye nesikhathi sokusebenza ngaphakathi kwe-US kufanele afakwe.

2) Ukuvikelwa kokuxhumana okungaqondile

Ukushaqeka kukagesi ngokungaqondile ezindaweni ezihlukene kungabangela amazinga ahlukene okulimala kumuntu, ngakho-ke ama-breaker circuit avuzayo ahlukene kufanele afakwe ezindaweni ezahlukene.Kudingeka ukuthi usebenzise ama-circuit breaker avuzayo azwela kakhulu ezindaweni lapho ukushaqeka kukagesi kuyingozi kakhulu.Ezindaweni ezimanzi kunasezindaweni ezomile ingozi yokushaqeka kukagesi inkulu kakhulu, ngokuvamile kufanele kufakwe umshini wokusebenza ongu-15-30mA, isikhathi sokusebenza phakathi kwe-0.1s yokuvuza kwe-circuit breaker.Ngemishini kagesi emanzini, isenzo kufanele sifakwe.Ukuvuza kwe-circuit breaker enamanje engu-6-l0mA nesikhathi sokusebenza ngaphakathi kwe-US.Okokusebenza kukagesi lapho u-opharetha kufanele ame entweni eyinsimbi noma esitsheni sensimbi, inqobo nje uma i-voltage ingaphezu kuka-24V, i-break breaker evuzayo enamandla okusebenza angaphansi kuka-15mA kanye nesikhathi sokusebenza ngaphakathi kwe-US kufanele kufakwe.Emishinini kagesi engaguquki ene-voltage engu-220V noma i-380V, lapho ukumelana komhlabathi kwendlu kungaphansi kwe-500fZ, umshini owodwa ungafaka i-breaker circuit breaker nge-current yokusebenza ye-30mA kanye nesikhathi sokusebenza se-0.19.Emishinini emikhulu kagesi enesilinganiso samanje esingaphezu kuka-100A noma isifunda sokuphakela amandla esinezinto eziningi zikagesi, isiphazamisi esivuzayo esinomshini wokusebenza we-50-100mA singafakwa.Lapho ukumelana okuphansi kwemishini kagesi kungaphansi kwe-1000, i-breaker circuit evuzayo ene-current yokusebenza ye-200-500mA ingafakwa.