• sns041
  • sns021
  • sns031

Isakhiwo, isimiso kanye nezici ze-vacuum circuit breaker

Isakhiwo, isimiso kanye nezici ze-vacuum circuit breaker

Isakhiwo se-vacuum circuit breaker
Isakhiwo se-vacuum circuit breaker ikakhulukazi sakhiwe izingxenye ezintathu: igumbi lokucisha i-arc ye-vacuum, indlela yokusebenza, ukusekela nezinye izingxenye.

1. Isiphazamisi sevacuum
Isiphazamisi se-vacuum, esaziwa nangokuthi i-vacuum switch tube, ingxenye eyinhloko ye-vacuum circuit breaker.Umsebenzi wayo oyinhloko ukunika amandla isekethe yamandla kagesi aphakathi nendawo naphezulu ukuthi icishe ngokushesha i-arc futhi icindezele amandla amanje ngemva kokunqamula ukunikezwa kwamandla ngokusebenzisa ukusebenza okuhle kakhulu kokufakwa kwe-vacuum epayipini, ukuze kugwenywe izingozi nezingozi.Iziphazamisi ze-vacuum zihlukaniswe iziphazamisi ze-vacuum zengilazi neziphazamisi ze-ceramic vacuum ngokuya ngamagobolondo azo.

Igumbi lokucisha i-arc ye-vacuum ikakhulukazi lakhiwe igobolondo eliqinile lokuvikela umoya, isekethe eliqhubayo, uhlelo lokuvikela, ukuthintana, izivuno nezinye izingxenye.

1) Isistimu yokufaka umoya eqinile
Isistimu ye-insulation eqinile iqukethe igobolondo le-insulation eliqinile elenziwe ngengilazi noma nge-ceramics, ipuleti lekhava elinyakazayo, ipuleti lekhava elingaguquki, kanye nensimbi engagqwali.Ukuze kuqinisekiswe ukuqina komoya okuhle phakathi kwengilazi, i-ceramics nensimbi, ngaphezu kwenqubo yokusebenza eqinile ngesikhathi sokubekwa uphawu, ukuvuthwa kwempahla ngokwayo kuyadingeka ukuthi kube kuncane ngangokunokwenzeka futhi ukukhululwa komoya kwangaphakathi kunqunyelwe okungenani.Izivunguvungu zensimbi engagqwali azikwazi nje ukuhlukanisa isimo se-vacuum ngaphakathi kwegumbi lokucisha i-arc ye-vacuum kusuka esimweni somkhathi wangaphandle, kodwa futhi zenza ukuthintana okunyakazayo kanye nenduku ehambayo ehambayo ihambe ngaphakathi kwebanga elicacisiwe ukuze kuqedelwe ukuxhuma nokunqanyulwa kokusebenza kwe-vacuum switch.

2) Uhlelo lokuqhuba
Isistimu yokuqhuba yegumbi lokucima i-arc iqukethe induku yokushayela engaguquki, indawo ye-arc egijimayo engaguquki, ukuthintana okuhleliwe, ukuthintana okunyakazayo, indawo ehamba phambili ye-arc ehambayo kanye nenduku yokuqhuba ehambayo.Phakathi kwazo, induku yokuqhuba ehleliwe, i-arc surface esebenzayo kanye nokuxhumana okuhleliwe kubizwa ndawonye ngokuthi i-electrode ehleliwe;Ukuthintana okunyakazayo, i-arc surface enyakazayo kanye nenduku ehambisayo ehambayo kubizwa ngokuhlanganyela ngokuthi i-electrode ehambayo.Lapho i-vacuum circuit breaker, i-vacuum load switch kanye ne-vacuum contactor ehlanganiswe yi-vacuum arc yokucisha ikamelo ivaliwe, indlela yokusebenza ivala othintana nabo ababili ngokuhamba kwenduku ye-conductive ehambayo, igcwalise uxhumano lwesifunda.Ukuze ugcine ukumelana nokuxhumana phakathi koxhumana nabo ababili kukuncane ngangokunokwenzeka futhi kuzinzile, futhi ube namandla amahle okusebenza lapho igumbi lokucisha i-arc liphethe amandla aguqukayo aguquguqukayo, i-vacuum switch ifakwe umkhono womhlahlandlela ekugcineni kwe-conductive enamandla. rod, kanye nesethi yemithombo yokucindezela isetshenziselwa ukugcina ingcindezi elinganiselwe phakathi koxhumana nabo ababili.Lapho iswishi ye-vacuum iphula amandla amanje, abathintwayo ababili begumbi lokucisha i-arc bayahlukana futhi benze i-arc phakathi kwabo kuze kube yilapho i-arc iphuma lapho okwamanje kuwela uziro ngokwemvelo, futhi ukuphuka kwesekethi kuqediwe.

3) Uhlelo lokuvikela
Uhlelo lokuvikela lwegumbi lokucisha i-arc le-vacuum lakhiwa ikakhulukazi isilinda esivikelayo, ikhava yokuvikela nezinye izingxenye.Imisebenzi esemqoka yesistimu yokuvikela yilezi:
(1) Vimbela ukuthintana ekukhiqizeni inani elikhulu lomhwamuko wensimbi kanye neconsi eliwuketshezi elichaphazayo phakathi ne-arcing, kungcolise udonga lwangaphakathi lwegobolondo le-insulating, okubangela ukuba amandla okuvikela ehle noma ehle.
(2) Ukuthuthukisa ukusatshalaliswa kwenkundla kagesi ngaphakathi kwesiphazamisi sevacuum kulungele ukwenziwa kancane kwegobolondo lokufakwa kwe-vacuum yesiphazamisi sevacuum, ikakhulukazi ekwenzeni okuncane kwesiphazamisi sevacuum enamandla kagesi aphezulu.
(3) Mumba ingxenye yamandla e-arc kanye nemikhiqizo ye-arc ejiyile.Ikakhulukazi lapho isiphazamisi se-vacuum siphazamisa wamanje we-short-circuit, amandla amaningi okushisa akhiqizwa i-arc amuncwa isistimu yokuvikela, esiza ekuthuthukiseni amandla okubuyisela i-dielectric phakathi koxhumana nabo.Uma sikhulu inani lemikhiqizo ye-arc emuncwa isistimu yokuvikela, amandla amakhulu ewathathayo, adlala indima enhle ekwandiseni amandla okuphuka kwesiphazamisi se-vacuum.

4) Uhlelo lokuxhumana
Ukuthintana yingxenye lapho i-arc ikhiqizwa futhi icishwa khona, futhi izidingo zezinto kanye nezakhiwo ziphakeme ngokuqhathaniswa.
(1) Izinto zokuthintwa
Kunezidingo ezilandelayo zezinto zokuxhumana:
a.Umthamo wokuphuka okuphezulu
Kudinga ukuthi i-conductivity yezinto ngokwayo inkulu, i-coefficient conductivity eshisayo incane, amandla okushisa makhulu, futhi umthamo wokukhishwa kwe-electron oshisayo uphansi.
b.I-voltage ephezulu yokuphuka
I-voltage ephezulu yokuphuka iholela emandleni aphezulu okubuyisela i-dielectric, okuzuzisa ukucisha i-arc.
c.Ukumelana nokugqwala okuphezulu kukagesi
Okusho ukuthi, ingakwazi ukumelana nokukhishwa kwe-arc kagesi futhi inokuhwamuka okuncane kwensimbi.
d.Ukumelana ne-fusion welding.
e.Inani lamanje lokusika eliphansi liyadingeka ukuthi libe ngaphansi kuka-2.5A.
f.Okuqukethwe kwegesi ephansi
Okuqukethwe komoya ophansi kuyimfuneko yazo zonke izinto ezisetshenziswa ngaphakathi kwesiphazamisi sevacuum.I-Copper, ikakhulukazi, kufanele ibe ithusi elingenayo i-oxygen ephathwa ngenqubo ekhethekile enegesi ephansi.Futhi i-alloy yesiliva neyethusi iyadingeka ukuze i-solder.
g.Impahla yokuxhumana yegumbi lokucisha i-arc ye-vacuum ye-circuit breaker ngokuvamile isebenzisa ingxubevange ye-chromium yethusi, i-copper ne-chromium ibalwa ku-50% ngokulandelanayo.Ishidi le-copper chromium alloy elinogqinsi oluyi-3mm lishiselwa ezindaweni zokukhwelana zokuthintana okuphezulu nangaphansi ngokulandelana.Okunye kubizwa nge-contact base, engenziwa ngethusi elingenawo umoya-mpilo.

(2) Isakhiwo sokuxhumana
Isakhiwo sokuxhumana sinomthelela omkhulu kumandla okuphuka kwegumbi lokucima i-arc.Umphumela wokucisha i-arc okhiqizwa ngokusebenzisa othintana nabo abanezakhiwo ezahlukene uhlukile.Kunezinhlobo ezintathu zoxhumana nabo abavame ukusetshenziswa: ukuxhumana kwesakhiwo sohlobo lwe-spiral trough, ukuxhumana kwesakhiwo okumise okwenkomishi ne-chute kanye nesakhiwo esimise inkomishi ukuthintana nensimu kazibuthe ye-longitudinal, lapho ukuxhumana kwesakhiwo okumise inkomishi nensimu kazibuthe ye-longitudinal iyona eyinhloko.

5) Amanzi
Izivunguvungu zekamelo lokucisha i-arc ye-vacuum inesibopho ngokuyinhloko sokuqinisekisa ukunyakaza kwe-electrode ehambayo phakathi kwebanga elithile nokugcina i-vacuum ephezulu isikhathi eside, futhi isetshenziselwa ukuqinisekisa ukuthi igumbi lokucisha i-arc elicishayo linokuphila okuphezulu komshini.Izivunguvungu zesiphazamisi se-vacuum iyisici esinezindonga ezincane esenziwe ngensimbi engagqwali enogqinsi luka-0.1~0.2mm.Phakathi nenqubo yokuvula nokuvalwa kwe-vacuum switch, izivunguvungu zegumbi lokucisha i-arc zingaphansi kokunwetshwa nokufinyela, futhi ingxenye yemvulo ingaphansi kokucindezeleka okuguquguqukayo, ngakho-ke impilo yesevisi ye-bellows kufanele inqunywe ngokuya ukunwetshwa okuphindaphindiwe nokufinyezwa kanye nokucindezela kwesevisi.Ukuphila kwesevisi ye-bellows kuhlobene nezinga lokushisa lokushisa kwezimo zokusebenza.Ngemuva kokuthi ikamelo lokucisha i-arc ye-vacuum liphule umsinga omkhulu we-short-circuit current, ukushisa okusalayo kwe-conductive rod kudluliselwa emifuleni ukuze kukhuphule izinga lokushisa lokuvunguza.Uma izinga lokushisa likhuphuka ngezinga elithile, lizobangela ukukhathala kwe-bellows futhi lithinte impilo yesevisi ye-bellows.


Isikhathi sokuthumela: Jul-04-2022
>