I-icro Circuit Breaker (i-MCB ngamafuphi) ingenye yezinto ezisetshenziswa kakhulu ezivikela isiphetho kumadivayisi okusabalalisa amandla kagesi. Ivamise ukusetshenziselwa umjikelezo omfishane wesigaba esisodwa nesigaba sesithathu, ukuvikela ukulayisha ngokweqile nokweqile kwe-voltage ngaphansi kwe-125A, futhi ngokuvamile itholakala ngezinketho ze-single-pole, i-double-pole, izigxobo ezintathu kanye nezigxobo ezine. Umsebenzi oyinhloko we-miniature circuit breaker (MCB) ukushintsha isekethe, okungukuthi lapho i-current ngokusebenzisa i-miniature circuit breaker (MCB) idlula inani elibekwe yiyo, izophula ngokuzenzakalelayo isekethe ngemva kwesikhathi esithile sokulibaziseka. Uma kudingekile, ingaphinda ivule futhi ivale isekethe ngesandla njengeswishi evamile.
I-Miniature Circuit Breaker (MCB) Isakhiwo kanye Nomgomo Wokusebenza
Ama-Miniature Circuit Breakers (MCB) enziwe ngezinto zokuvikela i-thermoplastic ezibunjwe endlini enemishini emihle, eshisayo kanye ne-insulating. Isistimu yokushintsha iqukethe othintana nabo abangaguquki nabanyakazayo abaxhumene nabo kanye nezintambo eziphumayo ezixhunywe ndawonye kanye nokulayisha amatheminali. Oxhumana nabo kanye nezingxenye eziphethe zamanje zenziwe ngethusi le-electrolytic noma i-alloys yesiliva, okukhethwa kukho okuncike ekulinganiseni kwamanje kwe-voltage ye-breaker circuit.
Lapho oxhumana nabo behlukana ngaphansi kwezimo zokugcwala ngokweqile noma zesekethe emfushane, kwakheka i-arc. I-modern miniature circuit breaker (MCB) isetshenziselwa ukuphazamisa noma ukuqeda idizayini ye-arc, ukumuncwa kwamandla e-arc kanye nokupholisa ngegumbi lokucisha i-arc ku-arc spacer yensimbi ukuze kubonwe, lezi zikhala ze-arc ezinobakaki abavalekile ezimiswe endaweni efanele. Ukwengeza, ukusetshenziswa kwamandla kagesi wesekethe ye-conductor (ama-circuit breakers manje anesakhiwo esinqunyelwe samanje sokuthuthukisa umthamo wokuphuka womkhiqizo) noma ukuvunguza kazibuthe, ukuze i-arc isheshe inyakaze futhi inwebe, ngokusebenzisa umzila wokugeleza kwe-arc ungene egumbini lesiphazamisi.
I-Miniature circuit breaker (MCB) indlela yokusebenza iqukethe idivayisi yokukhishwa kazibuthe ye-solenoid kanye nedivayisi yokukhishwa kwe-bimetal thermal. Idivayisi yokukhumula kazibuthe empeleni iyisekhethi kazibuthe. Lapho i-current evamile idluliswa emgqeni, amandla kazibuthe kagesi akhiqizwe i-solenoid angaphansi kwe-spring tension ukuze enze amandla okusabela, i-armature ayikwazi ukumuncwa i-solenoid, futhi i-circuit breaker isebenza ngokujwayelekile. Uma kunephutha lesifunda esifushane emugqeni, amandla akhona adlula izikhathi ezimbalwa kunowamanje ojwayelekile, amandla kazibuthe kagesi akhiqizwa uzibuthe kagesi makhulu kunamandla okusabela entwasahlobo, i-armature imuncwa uzibuthe kagesi ngokusebenzisa indlela yokudlulisela ukukhuthaza indlela yokukhululwa mahhala ukuze kukhululwe abathintwayo abakhulu. Othintana naye oyinhloko uhlukaniswe ngaphansi kwesenzo se-breaking spring ukusika umjikelezo ukuze udlale indima yokuvikela isikhashana.
Ingxenye eyinhloko kudivayisi yokukhishwa kwe-thermal yi-bimetal, ngokuvamile ecindezelwa ezinsimbi ezimbili ezihlukene noma ama-alloys ensimbi. Ingxubevange yensimbi noma yensimbi inesici, okungukuthi, insimbi ehlukile noma i-alloy yensimbi esimweni sokushisa, ukunwetshwa koshintsho lwevolumu akuhambisani, ngakho-ke lapho kushisa, ukwakheka kwezinto ezimbili ezihlukene zensimbi noma i-alloy yeshidi le-bimetallic, kuzoba ku-coefficient yokwandisa ohlangothini oluphansi lokugoba, ukukhuthaza ukukhululwa kwe-curture ukukhululwa kwe-curva. isenzo sokukhubeka, ukuze ubone ukuvikeleka kokugcwala ngokweqile. Njengoba ukuvikela ukugcwala ngokweqile kubonakala ngomphumela wokushisa, kwaziwa nangokuthi ukukhululwa kwe-thermal.
Ukukhethwa kwezigxobo ezi-1, 2, 3 nezi-4 ze-breaker circuit encane
Ama-Single-pole miniature circuit breaker asetshenziselwa ukuhlinzeka ngokushintsha nokuvikela isigaba esisodwa sesekhethi. Lawa ma-circuit breaker aklanyelwe ikakhulukazi amasekhethi ama-voltage aphansi. Lawa ma-circuit breaker asiza ekulawuleni izintambo ezithile, izinhlelo zokukhanyisa noma izitolo ezisendlini. Lezi zingabuye zisetshenziselwe ukuhlanza, izindawo zokukhanyisa ezijwayelekile, izibani zangaphandle, amafeni nama-blower njll.
Ama-circuit breaker amancane aphindwe kabili ngokuvamile asetshenziswa kumaphaneli eyunithi yokulawula abathengi njengamaswishi amakhulu. Kusukela kumitha yamandla, amandla ahlakazeka kuwo wonke ama-circuit breaker kuya ezingxenyeni ezihlukene zendlu. Izigebengu eziphindwe kabili zezigxobo ezincane zisetshenziselwa ukuhlinzeka ngokuvikeleka nokushintsha izintambo zesigaba nezimaphakathi.
Ama-breaker circuit amancane anezigxobo ezintathu asetshenziselwa ukuhlinzeka ngokushintsha nokuvikela kuphela izigaba ezintathu zesekethe, hhayi ukungathathi hlangothi.
I-four-pole miniature breaker, ngaphezu kokuhlinzeka ngokushintsha nokuvikela izigaba ezintathu zesekhethi, inomgadli ovikelayo ngokuyinhloko wesigxobo esimaphakathi (isb, isigxobo esingu-N). Ngakho-ke, i-four-pole miniature breaker kufanele isetshenziswe noma nini lapho ama-currents aphezulu angathathi hlangothi angaba khona kuwo wonke umjikelezo.
I-Miniature circuit breaker A (Z), B, C, D, K yokukhetha uhlobo lwejika
(1) A (Z) uhlobo lwe-circuit breaker: izikhathi ezi-2-3 zikalwe ngokwamanje, azivamile ukusetshenziswa, ngokuvamile zisetshenziselwa ukuvikelwa kwe-semiconductor (amafusi avame ukusetshenziswa)
(2) I-circuit breaker yohlobo lwe-B: izikhathi ezi-3-5 kunezinga lamanje elilinganiselwe, elivame ukusetshenziselwa imithwalo eqinile ephikisayo namasekhethi okukhanyisa anamandla kagesi aphansi, ngokuvamile asetshenziswa ebhokisini lokusabalalisa lemizi ukuze kuvikelwe izinto zikagesi zasendlini kanye nokuphepha komuntu siqu, okungasetshenziswa kancane okwamanje.
(3) I-C-type breaker breaker: izikhathi ezingu-5-10 zamanje ezilinganisiwe, zidinga ukukhululwa ngaphakathi kwemizuzwana engu-0.1, izici ze-breaker circuit zivame ukusetshenziswa, ezivame ukusetshenziswa ekuvikelweni kwemigqa yokusabalalisa kanye namasekethe okukhanyisa nge-high turn-on current.
(4) I-circuit breaker yohlobo lwe-D: izikhathi eziyi-10-20 kunezinga lamanje elilinganiselwe, ikakhulukazi endaweni yamandla kagesi aphezulu ngokushesha, ngokuvamile asetshenziswa kancane emndenini, emithwalweni ephezulu ye-inductive kanye nesistimu enkulu yamanje yokungena kwe-inrush, evame ukusetshenziswa ekuvikelweni kwemishini ene-inrush current ephezulu.
(5) Isiphazamiso sohlobo lwe-K: izikhathi ezingu-8-12 zamanje ezilinganiselwe, zidinga ukuba ngamasekhondi angu-0.1. Umsebenzi oyinhloko we-k-type miniature circuit breaker ukuvikela nokulawula isiguquli, amasekhethi asizayo namamotho kanye namanye amasekhethi ukusuka kumjikelezo omfushane nokulayisha ngokweqile. Ifanele ukulayishwa kwe-inductive kanye ne-motor enama-inrush currents aphezulu.
Isikhathi sokuthumela: Apr-09-2024