Lub ntiaj teb thawj Circuit Court breaker tau tsim nyob rau hauv 1885, kev sib txuas ntawm riam hloov thiab ib qho chaw mus ncig ua si. Xyoo 1905, lub tshuab hluav taws xob hluav taws xob nrog lub tshuab ua haujlwm pub dawb - tau tsim. Txij li thaum xyoo 1930, nrog kev nce qib thev naus laus zis, kev tshawb pom ntawm lub hauv paus ntawm hluav taws xob arc, thiab kev tsim tawm ntawm ntau yam arc - cov khoom siv tua hluav taws xob, cov tshuab hluav taws xob hluav taws xob tau maj mam ua cov duab. Nyob rau xyoo 1950, qhov nce ntawm cov khoom siv hluav taws xob tau coj mus rau kev tsim cov khoom siv hluav taws xob mus ncig. Niaj hnub no, kev siv dav dav ntawm microcontrollers tau ua rau cov khoom siv hluav taws xob ntse.
Cov hom muaj xws li qis-voltage Circuit Court breakers thiab lub tshuab nqus tsev vacuum: Tsawg-voltage circuit breakers yog cov khoom siv hluav taws xob siv hauv circuits nrog AC voltages ntawm 1200V thiab DC voltages ntawm 1500V rau kev ua haujlwm xws li hloov, tswj, lossis tiv thaiv. Tsawg-voltage circuit breakers yog ib qho tseem ceeb ntawm kev lag luam hluav taws xob thiab ib qho tseem ceeb hauv kev lag luam tshuab. Hauv cov tshuab hluav taws xob faib hluav taws xob, qis-voltage switchgear feem ntau yog tsim los ntawm ntau yam tsawg-voltage circuit breaker Cheebtsam. Kev ua haujlwm thiab kev ua haujlwm ntawm qis-voltage circuit breakers ua lub luag haujlwm tseem ceeb hauv qis{11}}voltage switchgear. Tshaj li 80% ntawm cov hluav taws xob hluav taws xob tsim los ntawm cov cuab yeej tsim hluav taws xob tau muab faib los ntawm cov hluav taws xob hluav taws xob qis qis. Rau txhua qhov ntxiv 10,000 kW ntawm cov cuab yeej tsim hluav taws xob, kwv yees li 20,000 qis -voltage circuit breakers ntawm ntau hom yog xav tau. Kev lag luam automation systems kuj xav tau ntau yam tswj vaj huam sib luag, consoles, thiab controllers ua los ntawm qis -voltage circuit breakers. Txij li xyoo 1949, Tuam Tshoj qhov qis-voltage circuit breaker kev lag luam tau maj mam tsim los ntawm kev kho hluav taws xob yooj yim thiab cov chaw tsim khoom sib dhos rau hauv kev lag luam uas muaj peev xwm tsim kev ywj pheej thiab tsim khoom. Thaum xyoo 1979, muaj ntau tshaj 600 lub tuam txhab tsim khoom. Tom qab ob qhov kev txhim kho siab tshaj plaws hauv xyoo 1985-1986 thiab 1990-1991, kev lag luam tau loj hlob mus rau kwv yees li 1,500 lub tuam txhab tsim khoom los ntawm 1995.
Tuam Tshoj qhov tsawg-voltage Circuit Court breaker manufacturing tuam txhab yog cov concentrated nyob rau hauv Beijing, Tianjin, Liaoning, Shanghai, Jiangsu, Zhejiang, thiab Guangdong. Thaum txhawb kev txhim kho kev lag luam hauv tebchaws, qhov no kuj tau nthuav tawm ntau yam teeb meem. Cov teeb meem tseem ceeb yog raws li nram no:
1. Cov lag luam me me dhau ntawm qhov teev thiab ntau dhau. Ntawm Tuam Tshoj tus nqi qis -voltage circuit breaker manufacturers, tsuas yog 2-4 yog cov tuam txhab loj nrog cov nyiaj tau los muag txhua xyoo thiab tag nrho cov khoom muaj nqis tshaj 500 lab yuan. Feem coob yog cov me thiab nruab nrab- cov lag luam loj (SMEs), uas ua rau tsis muaj kev lag luam ntawm cov nplai thiab kev sib tw. Tsis tas li ntawd, tus naj npawb ntawm cov hluav taws xob hluav taws xob hluav taws xob qis hluav taws xob hauv Suav teb tau loj hlob los ntawm cov neeg koom pheej thaum ntxov mus txog 1,500 hnub no. Qhov ntau ntawm cov tuam txhab lag luam no ua rau cov peev txheej kev lag luam tsis txaus, tsis muaj kev hloov pauv tshiab tag nrho, thiab yog li, kev tsim khoom tsawg, cov txiaj ntsig kev lag luam, thiab kev sib tw ua lag luam.
2. Regional structural convergence thiab loj duplication ntawm kev tsim kho. Vim tias qhov muag tsis pom kev nthuav dav thiab dhau - kev nqis peev hauv cov haujlwm, Tuam Tshoj qhov qis- hluav taws xob cov khoom siv hluav taws xob kev lag luam raug kev txom nyem los ntawm kev sib koom ua lag luam hauv cheeb tsam loj, qis- theem kev tsim kho, ua rau overproduction, tsis tshua muaj zog thiab cov khoom siv raw, kev lag luam qis, thiab cov txiaj ntsig xws li kev tiv thaiv hauv cheeb tsam thiab kev sib tw vicious.
Kev nce qib hauv lub tshuab nqus tsev hluav taws xob hluav taws xob tau tshwm sim hauv kev muaj peev xwm nce, qis dua qhov hluav taws xob, kev ua haujlwm ntse, thiab miniaturization. Qhov kev vam meej no yog tshwm sim los ntawm kev txhim kho ntawm lub tshuab nqus tsev, arc-kev tua chamber thev naus laus zis, thiab kev siv cov txheej txheem tshiab, cov khoom siv, thiab cov txheej txheem ua haujlwm. Raws li cov neeg tsim khoom, cov thev naus laus zis no, ntxiv rau kev ua haujlwm hloov pauv rau cov tshuab siv hluav taws xob ib txwm muaj, tseem yuav nthuav dav kev txhim kho thiab siv qhov chaw rau DC motors. Tsim loj- muaj peev xwm DC lub cev muaj zog los hloov AC synchronous generators thiab converter chaw nres tsheb cov khoom siv los ntawm siab -voltage DC kis tau tus mob tsis tau tsuas yog txuag tau ntau tus nqi tsim kho rau cov chaw nres tsheb hloov pauv, tab sis kuj txo qis kev poob qis.
