[Kev nthuav dav ntawm kev txhim kho thiab cov yam ntxwv ntawm lub tshuab nqus tsev vacuum breaker]: lub tshuab nqus tsev Circuit Court breaker yog hais txog lub tshuab hluav taws xob uas nws cov neeg raug kaw thiab qhib hauv lub tshuab nqus tsev.Lub tshuab nqus tsev Circuit Court breakers tau pib kawm los ntawm United Kingdom thiab United States, thiab tom qab ntawd tsim rau Nyiv, Lub teb chaws Yelemees, lub qub Soviet Union thiab lwm lub teb chaws.Tuam Tshoj pib kawm txoj kev tshawb xav ntawm lub tshuab nqus tsev vacuum Circuit Court breaker los ntawm 1959, thiab tsim tawm ntau lub tshuab nqus tsev Circuit Court breakers nyob rau hauv thaum ntxov 1970s.
Lub tshuab nqus tsev vacuum yog hais txog lub tshuab hluav taws xob uas nws cov neeg raug kaw thiab qhib hauv lub tshuab nqus tsev.
Lub tshuab nqus tsev Circuit Court breakers tau pib kawm los ntawm United Kingdom thiab United States, thiab tom qab ntawd tsim rau Nyiv, Lub teb chaws Yelemees, lub qub Soviet Union thiab lwm lub teb chaws.Tuam Tshoj tau pib kawm txoj kev xav ntawm lub tshuab nqus tsev vacuum breakers hauv xyoo 1959, thiab tau tsim ntau yam ntawm lub tshuab nqus tsev vacuum breakers nyob rau xyoo 1970s.Kev nruam ntej thiab kev txhim kho ntawm kev tsim cov thev naus laus zis xws li lub tshuab nqus tsev cuam tshuam, kev khiav hauj lwm cov txheej txheem thiab cov txheej txheem rwb thaiv tsev tau ua rau lub tshuab nqus tsev vacuum breaker txhim kho sai, thiab cov kev ua tiav tseem ceeb tau ua nyob rau hauv kev tshawb fawb ntawm lub peev xwm loj, miniaturization, kev txawj ntse thiab kev ntseeg tau.
Nrog rau qhov zoo ntawm qhov zoo arc extinguishing yam ntxwv, haum rau kev ua haujlwm tsis tu ncua, lub neej ntev hluav taws xob, kev ua haujlwm siab, thiab lub sijhawm ua haujlwm ntev, lub tshuab nqus tsev vacuum tau siv dav hauv kev hloov pauv hauv nroog thiab nyob deb nroog, kev lag luam tshuaj lom neeg, metallurgy, railway. hluav taws xob, mining thiab lwm yam kev lag luam hauv Suav teb lub zog kev lag luam.Cov khoom lag luam muaj ntau yam los ntawm ntau hom ZN1-ZN5 yav dhau los mus rau kaum ob tus qauv thiab ntau yam tam sim no.Qhov ntsuas tam sim no ncav cuag 4000A, qhov tam sim no tawg mus txog 5OKA, txawm tias 63kA, thiab qhov hluav taws xob nce mus txog 35kV.
Txoj kev loj hlob thiab cov yam ntxwv ntawm lub tshuab nqus tsev vacuum breaker yuav pom los ntawm ntau yam tseem ceeb, suav nrog kev txhim kho ntawm lub tshuab nqus tsev cuam tshuam, kev txhim kho kev khiav hauj lwm mechanism thiab kev txhim kho ntawm cov qauv rwb thaiv tsev.
Kev loj hlob thiab cov yam ntxwv ntawm lub tshuab nqus tsev cuam tshuam
2.1Kev txhim kho ntawm lub tshuab nqus tsev cuam tshuam
Lub tswv yim ntawm kev siv lub tshuab nqus tsev los tua cov arc tau muab tso rau hauv qhov kawg ntawm lub xyoo pua 19th, thiab lub tshuab nqus tsev cuam tshuam ntxov tshaj plaws tau tsim nyob rau xyoo 1920.Txawm li cas los xij, vim muaj kev txwv ntawm lub tshuab nqus tsev, cov khoom siv thiab lwm yam kev ua haujlwm, nws tsis yog qhov ua tau zoo thaum lub sijhawm ntawd.Txij li thaum xyoo 1950, nrog rau kev tsim cov thev naus laus zis tshiab, ntau yam teeb meem hauv kev tsim cov tshuab nqus tsev cuam tshuam tau raug daws, thiab lub tshuab nqus tsev hloov tau maj mam mus txog qhov ua tau zoo.Nyob rau hauv nruab nrab-1950s, General Electric Company ntawm lub tebchaws United States tsim ib tug batch ntawm lub tshuab nqus tsev Circuit Court breakers nrog rated tam sim no ntawm 12KA.Tom qab ntawd, nyob rau xyoo 1950s, vim yog kev txhim kho ntawm lub tshuab nqus tsev cuam tshuam nrog kev sib nqus sib nqus sib nqus, qhov ntsuas tam sim no tau nce mus rau 3OKA.Tom qab xyoo 1970, Toshiba Lub Tuam Txhab Hluav Taws Xob ntawm Nyij Pooj tau ua tiav lub tshuab nqus tsev cuam tshuam nrog cov kab sib nqus sib nqus ntev, uas ntxiv rau qhov ntsuas tam sim no ntau dua 5OKA.Tam sim no, lub tshuab nqus tsev vacuum breakers tau siv dav hauv 1KV thiab 35kV fais fab kev faib tshuab, thiab cov ntsuas tam sim no tuaj yeem ncav cuag 5OKA-100KAo.Qee lub tebchaws kuj tau tsim 72kV / 84kV lub tshuab nqus tsev cuam tshuam, tab sis tus lej tsawg.DC high-voltage generator
Nyob rau hauv xyoo tas los no, kev tsim cov tshuab nqus tsev vacuum breakers hauv Suav teb kuj tau tsim sai heev.Tam sim no, lub tshuab nqus tsev vacuum interrupters nyob rau hauv ib tug par nrog cov khoom txawv teb chaws.Muaj lub tshuab nqus tsev interrupters siv ntsug thiab kab rov tav magnetic teb tshuab thiab central ignition contact technology.Cov kev sib cuag ua los ntawm Cu Cr alloy cov ntaub ntawv tau ntse txiav 5OKA thiab 63kAo lub tshuab nqus tsev cuam tshuam hauv Suav teb, uas tau mus txog qib siab dua.Lub tshuab nqus tsev Circuit Court breaker tuaj yeem siv lub tshuab nqus tsev vacuum interrupters.
2.2Cov yam ntxwv ntawm lub tshuab nqus tsev interrupter
Lub tshuab nqus tsev arc extinguishing chamber yog qhov tseem ceeb ntawm lub tshuab nqus tsev vacuum breaker.Nws yog txhawb thiab kaw los ntawm iav los yog ceramics.Muaj cov dynamic thiab zoo li qub thiab tiv thaiv npog sab hauv.Muaj qhov tsis zoo siab nyob rau hauv lub chamber.Lub tshuab nqus tsev kawm ntawv yog 133 × 10 Cuaj 133 × LOJPa, los xyuas kom meej nws cov arc extinguishing kev ua tau zoo thiab rwb thaiv tsev theem thaum tawg.Thaum lub tshuab nqus tsev kawm ntawv txo qis, nws qhov kev ua haujlwm tawg yuav raug txo kom tsawg.Yog li ntawd, lub tshuab nqus tsev arc extinguishing chamber yuav tsum tsis txhob cuam tshuam los ntawm lwm yam quab yuam, thiab yuav tsum tsis txhob khob los yog xuas tes.Nws yuav tsum tsis txhob ntxhov siab thaum tsiv thiab tu.Nws yog txwv tsis pub muab ib yam dab tsi rau ntawm lub tshuab nqus tsev Circuit Court breaker los tiv thaiv lub tshuab nqus tsev arc extinguishing chamber los ntawm kev puas tsuaj thaum ntog.Ua ntej xa khoom, lub tshuab nqus tsev vacuum yuav tsum tau soj ntsuam nruj me ntsis thiab sib dhos.Thaum lub sij hawm tu, tag nrho cov bolts ntawm lub arc extinguishing chamber yuav tsum tau fastened los xyuas kom meej tsis muaj kev ntxhov siab.
Lub tshuab nqus tsev Circuit Court breaker cuam tshuam qhov tam sim no thiab tua cov arc hauv lub tshuab nqus tsev arc extinguishing chamber.Txawm li cas los xij, lub tshuab nqus tsev Circuit Court breaker nws tus kheej tsis muaj cov cuab yeej ua kom zoo thiab muaj nuj nqis saib xyuas cov yam ntxwv ntawm lub tshuab nqus tsev, yog li lub tshuab nqus tsev kawm ntawv txo qhov txhaum yog qhov yuam kev.Nyob rau tib lub sijhawm, kev txo qis ntawm lub tshuab nqus tsev yuav cuam tshuam rau lub tshuab nqus tsev Circuit Court breaker lub peev xwm los txiav tawm qhov dhau-tam sim no, thiab ua rau muaj kev poob qis hauv kev pab cuam lub neej ntawm lub Circuit Court breaker, uas yuav ua rau kev hloov pauv tawg thaum loj.
Raws li qhov tshwm sim, qhov teeb meem tseem ceeb ntawm lub tshuab nqus tsev cuam tshuam yog qhov nqus tsev kawm ntawv txo qis.Cov laj thawj tseem ceeb rau kev txo lub tshuab nqus tsev yog raws li hauv qab no.
(1) Lub tshuab nqus tsev vacuum breaker yog ib qho khoom muag.Tom qab tawm hauv lub Hoobkas, lub tshuab hluav taws xob lub raj xa hluav taws xob tuaj yeem muaj cov iav los yog ceramic seals tom qab ntau zaus ntawm kev thauj mus los, kev sib tsoo, kev sib tsoo, thiab lwm yam.
(2) Muaj teeb meem hauv cov khoom siv lossis kev tsim khoom ntawm lub tshuab nqus tsev cuam tshuam, thiab cov ntsiab lus xau tshwm sim tom qab ntau qhov haujlwm.
(3) Rau qhov sib cais ntawm lub tshuab nqus tsev Circuit Court breaker, xws li electromagnetic kev khiav hauj lwm mechanism, thaum kev khiav hauj lwm, vim qhov kev ncua deb ntawm kev khiav hauj lwm linkage, nws ncaj qha cuam tshuam rau synchronization, bounce, overtravel thiab lwm yam yam ntxwv ntawm kev hloov mus rau lub ceev ceev. nqus degree txo.DC high-voltage generator
Txoj kev kho kom txo qis lub tshuab nqus tsev vacuum interrupter:
Feem ntau saib xyuas lub tshuab nqus tsev cuam tshuam, thiab tsis tu ncua siv lub tshuab nqus tsev vacuum tester ntawm lub tshuab nqus tsev hloov los ntsuas lub tshuab nqus tsev nqus tsev vacuum interrupter, thiaj li ua kom ntseeg tau tias lub tshuab nqus tsev nqus tsev vacuum interrupter nyob rau hauv qhov kev teev tseg;Thaum lub tshuab nqus tsev kawm ntawv txo qis, lub tshuab nqus tsev cuam tshuam yuav tsum tau hloov, thiab cov yam ntxwv kev ntsuas xws li mob stroke, synchronization thiab bounce yuav tsum ua kom zoo.
3. Kev txhim kho ntawm kev khiav hauj lwm mechanism
Kev khiav hauj lwm mechanism yog ib qho tseem ceeb ntawm kev ntsuas kev ua haujlwm ntawm lub tshuab nqus tsev Circuit Court breaker.Qhov laj thawj tseem ceeb uas cuam tshuam qhov kev ntseeg ntawm lub tshuab nqus tsev Circuit Court breaker yog cov yam ntxwv ntawm kev khiav hauj lwm mechanism.Raws li kev txhim kho ntawm kev ua haujlwm mechanism, nws tuaj yeem muab faib ua pawg hauv qab no.DC high-voltage generator
3.1Manual kev khiav hauj lwm mechanism
Kev khiav hauj lwm mechanism cia siab rau kev kaw ncaj qha yog hu ua phau ntawv kev khiav hauj lwm mechanism, uas yog tsuas yog siv rau kev khiav lag luam Circuit Court breakers uas tsis tshua muaj voltage theem thiab qis rated tam sim no.Cov txheej txheem phau ntawv tau tsis tshua muaj siv nyob rau hauv sab nraum zoov fais fab department tshwj tsis yog kev lag luam thiab mining lag luam.Cov txheej txheem kev khiav hauj lwm phau ntawv yog yooj yim hauv cov qauv, tsis tas yuav tsum muaj cov cuab yeej pab cuam nyuaj thiab muaj qhov tsis zoo uas nws tsis tuaj yeem rov kaw thiab tuaj yeem ua haujlwm hauv zos xwb, uas tsis muaj kev nyab xeeb txaus.Yog li ntawd, phau ntawv kev khiav hauj lwm mechanism yuav luag tau hloov los ntawm lub caij nplooj ntoos hlav kev khiav hauj lwm mechanism nrog phau ntawv lub zog cia.
3.2Electromagnetic kev khiav hauj lwm mechanism
Lub tshuab ua haujlwm uas raug kaw los ntawm electromagnetic quab yuam hu ua electromagnetic operating mechanism d.CD17 mechanism yog tsim nyob rau hauv kev sib koom tes nrog domestic ZN28-12 khoom.Nyob rau hauv cov qauv, nws kuj tau teem rau pem hauv ntej thiab tom qab lub tshuab nqus tsev interrupter.
Qhov zoo ntawm electromagnetic kev khiav hauj lwm mechanism yog yooj yim mechanism, txhim khu kev qha kev lag luam thiab tsawg raug nqi.Qhov tsis zoo yog tias lub zog siv los ntawm lub kaw lus kaw yog qhov loj heev, thiab nws yuav tsum tau npaj [Kev nthuav dav ntawm kev txhim kho thiab cov yam ntxwv ntawm lub tshuab nqus tsev vacuum breaker]: Lub tshuab nqus tsev Circuit Court breaker yog hais txog lub Circuit Court breaker uas nws cov neeg raug kaw thiab qhib. hauv lub tshuab nqus tsev.Lub tshuab nqus tsev Circuit Court breakers tau pib kawm los ntawm United Kingdom thiab United States, thiab tom qab ntawd tsim rau Nyiv, Lub teb chaws Yelemees, lub qub Soviet Union thiab lwm lub teb chaws.Tuam Tshoj pib kawm txoj kev tshawb xav ntawm lub tshuab nqus tsev vacuum Circuit Court breaker los ntawm 1959, thiab tsim tawm ntau lub tshuab nqus tsev Circuit Court breakers nyob rau hauv thaum ntxov 1970s.
Cov roj teeb kim heev, loj kaw tam sim no, cov qauv loj, lub sijhawm ua haujlwm ntev, thiab maj mam txo qis kev lag luam.
3.3Caij nplooj ntoos hlav ua haujlwm mechanism DC high-voltage generator
Lub caij nplooj ntoos hlav kev khiav hauj lwm mechanism siv lub caij nplooj ntoos hlav lub zog khaws cia raws li lub hwj chim los ua kom qhov kev hloov ntawm qhov kev txiav txim kaw.Nws tuaj yeem tsav los ntawm cov neeg ua haujlwm lossis lub zog me me AC thiab DC lub cev muaj zog, yog li lub zog kaw yog qhov pib tsis cuam tshuam los ntawm cov khoom siv sab nraud (xws li lub zog hluav taws xob hluav taws xob, cua siab ntawm huab cua, hydraulic siab ntawm hydraulic siab qhov chaw), uas tuaj yeem tsis tsuas ua tiav siab kaw ceev, tab sis kuj paub ceev ceev tsis siv neeg rov ua haujlwm kaw;Tsis tas li ntawd, piv nrog lub tshuab electromagnetic kev khiav hauj lwm, lub caij nplooj ntoos hlav kev khiav hauj lwm mechanism muaj tus nqi qis thiab tus nqi qis.Nws yog cov feem ntau siv kev khiav hauj lwm mechanism nyob rau hauv lub tshuab nqus tsev Circuit Court breaker, thiab nws manufacturers kuj ntau, uas yog tas li txhim kho.CT17 thiab CT19 cov txheej txheem yog qhov raug, thiab ZN28-17, VS1 thiab VGl siv nrog lawv.
Feem ntau, lub caij nplooj ntoos hlav kev khiav hauj lwm mechanism muaj pua pua ntawm qhov chaw, thiab kis tau tus mob mechanism yog complex, nrog rau siab tsis ua hauj lwm tus nqi, muaj ntau yam txav thiab siab manufacturing txheej txheem.Tsis tas li ntawd, cov qauv ntawm lub caij nplooj ntoos hlav kev khiav hauj lwm mechanism yog complex, thiab muaj ntau zawv zawg kev sib txhuam qhov chaw, thiab lawv feem ntau yog nyob rau hauv qhov tseem ceeb.Thaum lub sijhawm ua haujlwm ntev, kev hnav thiab corrosion ntawm cov khoom no, nrog rau kev poob thiab kho cov roj nplua nyeem, yuav ua rau muaj kev ua haujlwm tsis raug.Feem ntau muaj cov nram qab no shortcomings.
(1) Lub Circuit Court breaker tsis kam ua haujlwm, uas yog, nws xa cov teeb liab ua haujlwm rau lub Circuit Court breaker yam tsis tau kaw lossis qhib.
(2) Lub qhov hluav taws xob tsis tuaj yeem raug kaw lossis raug kaw tom qab kaw.
(3) Thaum muaj xwm txheej, kev tiv thaiv kev tiv thaiv relay thiab Circuit Court breaker tsis tuaj yeem raug txiav.
(4) Hlawv lub kaw lus kaw.
Kev tsis ua haujlwm ua rau kev tsom xam ntawm kev ua haujlwm mechanism:
Lub Circuit Court breaker tsis kam ua haujlwm, uas tej zaum yuav tshwm sim los ntawm qhov poob ntawm qhov hluav taws xob lossis qhov hluav taws xob tsis zoo ntawm kev khiav hauj lwm voltage, kev cuam tshuam ntawm kev khiav hauj lwm Circuit Court, disconnection ntawm lub kaw coil los yog qhib coil, thiab cov neeg pluag kev sib cuag ntawm lub auxiliary switches. ntawm lub mechanism.
Lub qhov hluav taws xob tsis tuaj yeem raug kaw lossis qhib tom qab kaw, uas tuaj yeem tshwm sim los ntawm kev ua haujlwm tsis muaj zog ntawm lub zog ua haujlwm, kev sib txuas ntau dhau ntawm kev txav mus los ntawm kev sib cuag ntawm lub Circuit Court breaker, disconnection ntawm interlocking kev sib cuag ntawm lub auxiliary hloov, thiab tsawg heev. kev sib txuas ntawm ib nrab ncej ntawm kev khiav hauj lwm mechanism thiab pawl;
Thaum muaj xwm txheej, qhov kev tiv thaiv relay thiab lub Circuit Court breaker tsis tuaj yeem raug txiav.Tej zaum nws yuav muaj cov teeb meem txawv teb chaws nyob rau hauv qhov qhib hlau tub ntxhais uas tiv thaiv cov tub ntxhais hlau los ntawm kev ua haujlwm yooj yim, qhov qhib kev sib tw ib nrab ntawm cov ncej tsis tuaj yeem tig tau yooj yim, thiab qhib kev ua haujlwm Circuit Court raug txiav.
Cov laj thawj tshwm sim rau kev kub hnyiab kaw lub kauj yog: DC contactor tsis tuaj yeem txiav tawm tom qab kaw, qhov hloov pauv tsis tig mus rau qhov qhib tom qab kaw, thiab qhov hloov pauv tau xoob.
3.4Permanent hlau nplaum mechanism
Lub tshuab hlau nplaum ruaj khov siv lub hauv paus ntsiab lus ua haujlwm tshiab los ua kom cov khoom siv hluav taws xob sib txuas nrog cov hlau nplaum ruaj khov, kom tsis txhob muaj qhov tsis zoo tshwm sim los ntawm kev siv tshuab tsis zoo ntawm qhov chaw kaw thiab qhib thiab kaw qhov system.Lub zog tuav tau tsim los ntawm cov hlau nplaum ruaj khov tuaj yeem ua kom lub tshuab nqus tsev vacuum nyob rau hauv qhov chaw kaw thiab qhib txoj haujlwm thaum xav tau lub zog txhua yam.Nws yog txawm peem rau nrog ib tug tswj system kom paub tag nrho cov functionality yuav tsum tau los ntawm lub tshuab nqus tsev Circuit Court breaker.Nws tuaj yeem muab faib ua ob hom: monostable ruaj khov magnetic actuator thiab bistable ruaj khov magnetic actuator.Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm bistable ruaj khov magnetic actuator yog qhov qhib thiab kaw ntawm lub actuator nyob ntawm qhov chaw sib nqus mus tas li;Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm monostable mus tas li hlau nplaum kev khiav hauj lwm mechanism yog qhib sai sai nrog kev pab los ntawm lub zog cia lub caij nplooj ntoos hlav thiab ua kom qhib txoj hauj lwm.Tsuas yog kaw tuaj yeem ua kom lub zog sib nqus mus tas li.Trede Electric cov khoom tseem ceeb yog monostable ruaj khov hlau nplaum actuator, thiab cov lag luam hauv tsev feem ntau tsim cov bistable ruaj khov hlau nplaum actuator.
Cov qauv ntawm bistable ruaj khov hlau nplaum actuator sib txawv, tab sis tsuas muaj ob hom qauv: ob chav coil hom (symmetrical type) thiab ib co coil hom (asymmetrical type).Ob qho qauv no tau qhia luv luv hauv qab no.
(1) Ob chav coil ruaj khov hlau nplaum mechanism
Ob chav coil mus tas li hlau nplaum mechanism yog tus cwj pwm los ntawm: siv cov hlau nplaum tas mus li kom lub tshuab nqus tsev Circuit Court breaker ntawm qhov qhib thiab kaw txoj haujlwm feem, siv excitation coil los thawb cov tub ntxhais hlau ntawm lub tshuab los ntawm txoj haujlwm qhib mus rau qhov chaw kaw, thiab siv lwm excitation coil los thawb cov tub ntxhais hlau ntawm lub tshuab los ntawm qhov chaw kaw mus rau qhov chaw qhib.Piv txwv li, ABB's VMl hloov tshuab txais cov qauv no.
(2) Ib kauj ruam ruaj khov hlau nplaum mechanism
Ib lub kauj hlau ruaj ruaj ruaj hlau nplaum tseem siv cov hlau nplaum ruaj khov los ua kom lub tshuab nqus tsev Circuit Court breaker ntawm qhov txwv tsis pub qhib thiab kaw, tab sis ib qho coil zoo siab yog siv los qhib thiab kaw.Kuj tseem muaj ob qhov excitation coils rau qhib thiab kaw, tab sis ob lub coils yog nyob rau tib sab, thiab cov kev taw qhia ntws ntawm cov kab sib txuas yog qhov sib txawv.Nws lub hauv paus ntsiab lus yog tib yam li ntawm ib co coil mus tas li hlau nplaum mechanism.Lub zog kaw feem ntau yog los ntawm excitation coil, thiab lub zog qhib feem ntau yog los ntawm lub caij nplooj ntoos hlav qhib.Piv txwv li, GVR kem mounted lub tshuab nqus tsev Circuit Court breaker launched los ntawm Whipp & Bourne Company nyob rau hauv lub UK txais yuav no mechanism.
Raws li cov yam ntxwv saum toj no ntawm cov hlau nplaum ruaj khov mechanism, nws qhov zoo thiab qhov tsis zoo tuaj yeem raug sau tseg.Qhov zoo yog tias cov qauv yog qhov yooj yim, piv nrog lub caij nplooj ntoos hlav mechanism, nws cov khoom raug txo los ntawm 60%;Nrog rau cov khoom tsawg dua, tus nqi tsis ua haujlwm kuj yuav raug txo, yog li qhov kev ntseeg siab yog siab;Ntev kev pab cuam lub neej ntawm mechanism;Me me thiab lub teeb yuag.Qhov tsis zoo yog tias nyob rau hauv cov ntsiab lus ntawm kev qhib cov yam ntxwv, vim hais tias cov hlau txav txav tau koom nrog hauv kev qhib lub zog, cov lus tsa suab inertia ntawm lub zog txav tau nce ntau thaum qhib, uas yog qhov tsis zoo los txhim kho qhov nrawm ntawm qhov qhib qhib;Vim lub zog ua haujlwm siab, nws raug txwv los ntawm lub peev xwm capacitor.
4. Kev txhim kho ntawm cov txheej txheem rwb thaiv tsev
Raws li kev txheeb cais thiab kev txheeb xyuas ntawm cov xwm txheej hauv kev ua haujlwm ntawm high-voltage circuit breakers hauv lub teb chaws lub zog hluav taws xob raws li cov ntaub ntawv keeb kwm cuam tshuam, qhov tsis ua haujlwm qhib nyiaj rau 22.67%;Kev tsis kam koom tes suav nrog 6.48%;Kev tawg thiab ua kom raug xwm txheej suav txog 9.07%;Rwb thaiv tsev xwm txheej suav txog 35.47%;Kev sib tsoo tsis raug suav nrog 7.02%;Cov dej raug kaw yog 7.95%;Kev quab yuam sab nraud thiab lwm yam xwm txheej suav nrog 11.439 tag nrho, ntawm cov xwm txheej rwb thaiv tsev thiab kev sib cais tsis lees paub qhov xwm txheej yog qhov tseem ceeb tshaj plaws, suav txog li 60% ntawm tag nrho cov xwm txheej.Yog li ntawd, cov qauv rwb thaiv tsev kuj yog ib qho tseem ceeb ntawm lub tshuab nqus tsev Circuit Court breaker.Raws li kev hloov pauv thiab kev txhim kho ntawm theem kab hluav taws xob, nws tuaj yeem muab faib ua peb tiam: huab cua rwb thaiv tsev, rwb thaiv tsev sib xyaw, thiab cov khoom sib khi ncej rwb thaiv tsev.
Post lub sij hawm: Oct-22-2022