I-circuit breaker

I-circuit breaker isho idivayisi eshintshayo engavala, ithwale futhi inqamuke ngaphansi kwezimo ezijwayelekile zesekhethi futhi engavala, ithwale futhi iphule i-current ngaphansi kwezimo zesekhethi ezingavamile ngesikhathi esithile.Ama-breaker circuit ahlukaniswe abe ama-high-voltage circuit breaker kanye nama-low-voltage circuit breaker ngokuvumelana nobubanzi bawo bokusetshenziswa.

Izinqamuli zesekethe zingasetshenziselwa ukusabalalisa amandla kagesi, ziqale amamotho asynchronous njalo, futhi zivikele izintambo zikagesi namamotho.Uma zinamaphutha amakhulu kakhulu noma ama-short-circuit kanye ne-under-voltage, zinganqamula isekethe ngokuzenzakalelayo.Umsebenzi wayo ulingana neswishi ye-fuse.Inhlanganisela ne overheating kanye underheating relay, njll Ngaphezu kwalokho, ngokuvamile akudingekile ukushintsha izingxenye ngemva kokuphula iphutha wamanje.Isetshenziswe kabanzi.

Ukusatshalaliswa kwamandla kuyisixhumanisi esibaluleke kakhulu ekukhiqizeni, ekudlulisweni nasekusetshenzisweni kukagesi.Uhlelo lokusabalalisa amandla luhlanganisa ama-transformer kanye nemishini kagesi ehlukahlukene ephezulu naphansi, kanti i-low voltage circuit breaker iyisisetshenziswa sikagesi esisetshenziswa kakhulu.

Umgomo wokusebenza:

I-circuit breaker ngokuvamile yakhiwa isistimu yokuxhumana, isistimu yokucisha i-arc, indlela yokusebenza, ukukhululwa, kanye ne-casing.

Uma isifunda esifushane senzeka, inkambu kazibuthe ekhiqizwa amandla amakhulu (ngokuvamile izikhathi ezingu-10 kuya kwezingu-12) inqoba intwasahlobo yamandla okusabela, ukukhululwa kudonsa indlela yokusebenza ukuze isebenze, bese iswishi ihambe ngokushesha.Uma ilayishwa ngokweqile, i-current iba nkulu, isizukulwane sokushisa siyakhula, futhi ishidi le-bimetallic liguga ngezinga elithile ukuze kuthuthukiswe isenzo somshini (omkhulu owamanje, isikhathi sesenzo esifushane).

Kukhona uhlobo lwe-elekthronikhi, olusebenzisa i-transformer ukuqoqa okwamanje kwesigaba ngasinye futhi iqhathanise nenani elibekiwe.Uma okwamanje kungavamile, i-microprocessor ithumela isignali ukwenza ukukhishwa kwe-elekthronikhi kushayele indlela yokusebenza ukuze isebenze.

Umsebenzi we-circuit breaker ukusika nokuxhuma isifunda somthwalo, kanye nokusika isifunda sephutha, ukuvimbela ingozi ekukhuleni, nokuqinisekisa ukusebenza okuphephile.I-high-voltage circuit breaker idinga ukuphula ama-arcs angu-1500V nge-current ye-1500-2000A.Lawa ma-arcs anganwetshwa abe ngu-2m futhi aqhubeke nokuvutha ngaphandle kokucisha.Ngakho-ke, ukucisha i-arc kuyinkinga okufanele ixazulule ama-breaker circuit-voltage.

Umgomo wokuvuthela i-arc kanye nokucisha i-arc ngokuyinhloko ukupholisa i-arc ukunciphisa ukuhlukaniswa okushisayo.Ngakolunye uhlangothi, ukwandisa i-arc ngokufutha i-arc ukuqinisa ukuhlangana kabusha nokusabalalisa izinhlayiya ezikhokhisiwe, futhi ngesikhathi esifanayo, izinhlayiya ezikhokhisiwe ku-arc gap zishaywa umoya, futhi amandla e-dielectric we-medium abuyiselwa ngokushesha. .

Ama-circuit breaker ane-low-voltage, awaziwa nangokuthi ama-automatic air switches, angasetshenziswa ukuvula nokuvala amasekhethi okulayisha, futhi angasetshenziswa ukulawula amamotho aqala njalo.Umsebenzi wayo ulingana nesamba seminye noma yonke imisebenzi yezinto zikagesi ezifana nokushintshwa kommese, ukudluliswa kwe-overcurrent, i-voltage loss relay, i-thermal relay nesivikelo sokuvuza.Kuwuhlelo lukagesi olubalulekile oluvikelayo kunethiwekhi yokusabalalisa i-low-voltage.

Ama-circuit breaker ane-low-voltage enezinzuzo zemisebenzi eminingi yokuvikela (ukulayisha ngokweqile, i-short-circuit, ukuvikelwa kwe-voltage engaphansi, njll.), inani lesenzo elilungisekayo, umthamo wokuphuka okuphezulu, ukusebenza okulula, nokuphepha, ngakho asetshenziswa kabanzi.Isakhiwo kanye nesimiso sokusebenza I-low-voltage circuit breaker yakhiwe indlela yokusebenza, abathintwayo, izinto zokuvikela (ukukhishwa okuhlukahlukene), kanye nesistimu yokucisha i-arc.

Othintana nabo abakhulu bama-circuit breaker ane-voltage ephansi basebenza mathupha noma bavalwe ngogesi.Ngemva kokuba othintana naye oyinhloko evaliwe, indlela yohambo lwamahhala ikhiya othintana naye oyinhloko endaweni evaliwe.Ikhoyili yokukhululwa kwe-overcurrent kanye ne-thermal element yokukhululwa kwe-thermal ixhunywe kuchungechunge nesekhethi eyinhloko, futhi ikhoyili yokukhishwa kwe-undervoltage ixhunywe ngokuhambisana nokunikezwa kwamandla.Uma isekethe ine-circuited emfushane noma ilayishwe kakhulu, i-armature yokukhululwa kwe-overcurrent idonselwa ukuze kwenziwe indlela yohambo lwamahhala isebenze, futhi othintana naye oyinhloko unqamula isekethe enkulu.Uma isifunda sigcwele kakhulu, isici esishisayo sokukhululwa kwe-thermal sizoshisa futhi agobe i-bimetal, iphushe indlela yokukhulula ukuze isebenze.Uma isifunda singaphansi kwamandla, i-armature yokukhululwa kwe-undervoltage iyakhululwa.Futhi vula indlela yohambo lwamahhala.Ukukhishwa kwe-shunt kusetshenziselwa isilawuli kude.Ngesikhathi sokusebenza okuvamile, ikhoyili yayo iyacishwa.Uma kudingeka ibanga lokulawula, cindezela inkinobho yokuqala ukuze ikhoyili isebenze.

Izici eziyinhloko:

Izici ze-breaker circuit ikakhulukazi zifaka: i-voltage elinganiselwe i-Ue;ikalwe ngaphakathi;ukuvikelwa kokulayisha ngokweqile (i-Ir noma i-Irth) nokuvikelwa kwesifunda esifushane (Im) uhla lwezilungiselelo lwamanje lokukhubeka;ilinganiselwe i-short-circuit breaker (i-industrial circuit breaker Icu; i-breaker circuit yasendlini I-Icn )Linda.

I-Rated Operating Voltage (Ue): Lena i-voltage lapho i-breaker yesekethe isebenza ngaphansi kwezimo ezijwayelekile (ezingaphazamiseki).

Isilinganiso samanje (Ngaphakathi): Leli inani eliphezulu lamanje i-circuit breaker ehlomeke nge-overcurrent trip relay ekhethekile engakwazi ukumelana nezinga lokushisa le-ambient elicaciswe umkhiqizi, futhi ngeke lidlule umkhawulo wezinga lokushisa oshiwo ingxenye yebheringi yamanje.

Inani lamanje lokusetha uhambo lokudlulisa isifunda esifushane (Im): Ireyiyi yohambo lwesifunda esifushane (ngokuphazima kweso noma ukubambezeleka okufushane) isetshenziselwa ukukhuba isinqamuli sesekethe lapho kwehla inani eliphezulu lephutha lamanje, futhi umkhawulo wohambo lwakho ngu-Im.

Isilinganiso sokuphuka kwesekethe emfishane (i-Icu noma i-Icn): Isilinganiso sokuphulwa kwesekethe emfishane esilinganisiwe se-circuit breaker yinani eliphezulu (elilindelwe) lamanje elingakwazi ukuliphuka ngaphandle kokulimala.Amanani amanje ahlinzekwe ezingeni elijwayelekile inani le-rms lengxenye ye-AC yephutha lamanje, kanye nengxenye yesikhashana ye-DC (ehlala ivela esimweni esifushane esibi kakhulu) kucatshangwa ukuthi inguziro lapho kubalwa inani elijwayelekile. .Izilinganiso ze-Industrial breaker breaker (Icu) kanye nezilinganiso ze-circuit breaker (Icn) ngokuvamile zinikezwa ngama-kA rms.

Umthamo wokuphulwa kwesekethe emfishane (I-Ics): Amandla okuphuka alinganiselwe we-breaker circuit ihlukaniswe yaba izinhlobo ezimbili: ukulinganisa kokugcina komthamo wokuphuka kwesekethe emfishane kanye nokulinganisa amandla okuphuka kwesekethe emfushane.