Ib qho peb -theem luv luv Circuit Court yog qhov kev puas tsuaj loj tshaj plaws thiab siab tshaj - lub zog ua txhaum hauv lub zog faib hluav taws xob. Thaum lub sijhawm qhov txhaum tshwm sim, qhov luv -circuit tam sim no surges tam sim ntawd mus rau kaum tawm lub sij hawm tam sim no, thiab siab -kub arcs, electromagnetic shocks, thiab electrodynamic oscillations tuaj yeem ua rau rwb thaiv tsev tawg, hlawv tawm cov khoom siv, thiab cuam tshuam rau cov kab hluav taws xob sab saud. Hauv kev tiv thaiv lub zog logic, lub luag haujlwm tseem ceeb ntawm qis dua -theem switchgear yog ob qho tib si heroic thiab meej: ua thawj zaug ua thaum muaj kev txhaum tshwm sim, ua lag luam "tswj kev txi" ntawm cov cuab yeej hauv zos kom muaj kev nyab xeeb ntawm cov kab hluav taws xob sab saud. Lub sijhawm 50-millisecond (ms) mus txawv tebchaws yog qhov tseeb ntawm kev lag luam qhov pib kub rau qhov muaj kev puas tsuaj luv luv, cais cov kab hluav taws xob, thiab txo cov kev pheej hmoo. Seb nws yog lub ntsiab12 kV hloovnyob rau hauv kev faib khoom network, qhib -thav duab cua- tawg switchgear, los yog tag nrhohlau -clad switchgear, lub peev xwm ua tau raws li 50-ms ultra-ceev mus txawv tebchaws tus qauv ncaj qha txiav txim siab seb qhov txhaum puas yog "muaj nyob hauv zos" lossis "propagates thoob plaws tag nrho daim phiaj."
Ntau tus neeg ua haujlwm thiab tu cov neeg ua haujlwm tsuas yog tsom mus rau qhov kev ua haujlwm niaj hnub ntawm cov khoom siv hloov pauv hauv lawv cov haujlwm niaj hnub, tseem tsis tau saib xyuas qhov kev lees paub ntawm qhov tseem ceeb no rau millisecond -theem ultra- nrawm nrawm. Nyob rau hauv qhov xwm txheej ntawm peb tam sim no -theem luv luv Circuit Court, zoo tib yam switchgear-nrog rau nws cov lus teb qeeb thiab qeeb disconnection- yuav tsis tsuas yog puas tag nrho tab sis kuj yuav ua rau cascading mus txawv tebchaws nyob rau theem siab dua, ua rau muaj hluav taws xob tawm thoob plaws hauv cheeb tsam kev pabcuam. Tsab ntawv xov xwm no yuav muab ib qho kev soj ntsuam hauv - qhov tob ntawm cov txheej txheem kev tshawb fawb tom qab 50-millisecond ultra- muaj peev xwm mus ncig sai, sib piv qhov luv luv- kev tiv thaiv hluav taws xob muaj peev xwm ntawm peb hom khoom siv-12 kV switchgear, cua - tawg switchgear yuav ua li cas, thiab cov khoom siv hluav taws xob tiv thaiv hluav taws xob yuav ua li cas siv los ua kom muaj kev sib cais tsis raug cai thiab xyuas kom muaj kev nyab xeeb ntawm daim phiaj.
I. Vim li cas 50 ms? Qhov tseem ceeb tshaj plaws rau peb -Phase Short-Circuit Protection
Lub zog tso tawm cuam tshuam nrog peb -theem luv- Circuit Court txhaum yog sai heev. Thawj 20 ms tom qab qhov txhaum yog lub sij hawm ntawm arc ignition thiab tam sim no ncov surge, thaum lub sij hawm 20-50 ms interval yog lub sij hawm ntawm rwb thaiv tsev tawg, khoom burnout, thiab kab sib chaws hloov pauv. Raws li cov qauv kev tiv thaiv hluav taws xob relay thiab cov ntaub ntawv ntsuas teb, 50 ms yog qhov tseem ceeb rau kev sib cais luv luv - Circuit Court faults, tiv thaiv kev nthuav tawm ntawm qhov tsis raug sab saud, thiab tswj cov khoom puas.
If the interruption time is ≤50 ms: the short-circuit arc has not fully propagated, the extent of equipment damage is controllable, and the fault current cannot impact the upstream busbar or the main power grid, thereby achieving "a single-cabinet fault, localized isolation, and no damage to the entire grid"; if the interruption time is >50 ms: lub arc tseem kub hnyiab, lub txee rwb thaiv tsev yog ua txhaum tag nrho, lub busbar overheats hnyav, thiab kev tiv thaiv sab saum toj raug yuam kom mus los ntawm qib siab dua, ua rau muaj kev txhaum me me kom nce ncaj qha mus rau hauv cheeb tsam fais fab kev sib tsoo. Nws tuaj yeem hais tias ultra- kev sib txuas ceev ceev hauv 50 ms yog tus qauv muaj peev xwm tseem ceeb rau kev hloov pauv mus rau "kev txi nws tus kheej los tiv thaiv tag nrho cov kab ke."
Switchgear ntawm cov qauv sib txawv pom qhov sib txawv tseem ceeb hauv ultra- muaj peev xwm cuam tshuam sai. Cov pa cua - tawg switchgear cia siab rau huab cua los tua arcs, thiab nws cov arc - tua ceev yog qhov txwv; nws lub sij hawm disconnection siab tshaj plaws feem ntau yog nyob rau hauv 40-60 ms ntau, uas yog nyob rau ntawm qhov tseem ceeb rau kev ua raws cai. Mainstream 12 kV switchgear ntiav lub tshuab nqus tsev arc-extinguishing thev naus laus zis, ua ke nrog kev tiv thaiv kev ntse ntse, kom ntseeg tau tias qhov kev sib txuas tsis pub dhau 30-50 ms; siab-kawghlau-clad switchgear,nrog nws cov hlau ntim tag nrho-cov qauv clad thiab millisecond- qib sampling tiv thaiv qhov system, muaj kev tiv thaiv zoo tshaj rau luv luv- Circuit Court cuam tshuam, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau ultra- kev tiv thaiv ceev ceev hauv kev ua haujlwm hnyav.
2.A Hard-Core Sib piv ntawm 50 ms Breaking Peev Xwm ntawm Hom II thiab Hom III Switchgear
Peb-theem luv- muaj peev xwm tiv thaiv hluav taws xob tsis nyob ntawm cov cuab yeej ntsuas ntsuas, tab sis yog nyob ntawm peb qhov ntsuas tseem ceeb: arc-quenching qauv, kev tiv thaiv teb, thiab kev khiav hauj lwm ceev. Cov yam ntxwv tiv thaiv ceev ceev ntawm feem ntau siv hom II thiab Hom III switchgear txawv ntawm lawv cov kev siv tsim nyog thiab kev ruaj ntseg redundancy.
Raws li cov khoom siv tseem ceeb rau kev lag luam thiab kev lag luam mining, kev faib tawm hauv nroog, thiab kev lag luam chaw ua si fais fab,12 kV hloovua hauj lwm raws li qhov tseem ceeb ntawm peb -theem luv- tiv thaiv Circuit Court. Standardized 12 kV switchgear, nruab nrog lub tshuab nqus tsev vacuum breakers thiab instantaneous overcurrent tiv thaiv, nta millisecond-theem CT sampling, ceev relay teb, thiab ua ntej-energized mechanical tripping- kom ntseeg tau tias tag nrho cov kev ua haujlwm ib ntus tswj tau hauv 50 ms. Nyob rau hauv qhov xwm txheej ntawm peb tam sim no -theem luv Circuit Court, nws tuaj yeem cais cov ceg tsis raug thiab tiv thaiv tam sim no los ntawm kev ntws rov qab mus rau hauv kab hluav taws xob sab saud, ua rau nws muaj qhov sib npaug siab tshaj -cov cuab yeej tiv thaiv ceev rau ob qho tib si hauv tsev thiab kev lag luam hluav taws xob faib hluav taws xob scenarios.
Cua - tawg switchgearfeem ntau yog siv nyob rau hauv qis-voltage thiab qee qhov nruab nrab-voltage qhib- hom hluav taws xob faib scenarios. Nws tso siab rau lub ntuj arc-quenching zog ntawm huab cua raws li ib tug nruab nrab, featuring ib tug yooj yim qauv thiab yooj yim txij nkawm. Txawm li cas los xij, vim muaj kev txwv hauv arc-txoj cai tua hluav taws, muaj lub hauv paus caj dab hauv nws qhov nrawm nrawm. Thaum ntsib nrog siab - siv peb- theem luv - Circuit Court faults, lub sij hawm tawg ntawm qee cov cuab yeej qub tuaj yeem tshaj li 50-millisecond qhov pib tseem ceeb, ua rau muaj teeb meem xws li tsis tiav arc extinction thiab fault re{14}}ignition. Yog li ntawd, huab cua- tawg switchgear yog qhov zoo dua rau cov xwm txheej nrog cov khoom ruaj khov thiab luv luv - qhov tshwm sim hauv Circuit Court, thiab tsis tuaj yeem ua raws li qhov xav tau ntawm qhov siab - zaus surges thiab muaj kev pheej hmoo luv luv Circuit Court.
Hlau -clad switchgear yog qhov siab- kawg, tag nrho cov khoom siv tiv thaiv uas siv cov qauv armored, ib qho kev sib koom ua ke ntawm kev ywj pheej, thiab lub siab - lub zog txee enclosure. Nws yog nruab nrog optimized ultra-fast arc-extinguishing mechanism thiab high-precision relay tiv thaiv system. Hlau-clad switchgear muaj luv luv- lub sij hawm teb lub voj voog thiab kev ua haujlwm ruaj khov dua, kev ntseeg tau ua tiav ultra- txiav tawm sai li ntawm 30–45 ms. Tsis tsuas yog nws ua tau raws li 50-millisecond tus qauv tiv thaiv, tab sis nws kuj tiv taus qhov cuam tshuam ntawm hluav taws xob luv luv luv. Txawm hais tias nyob rau hauv qhov kev tshwm sim ntawm ib qho luv luv Circuit Court, nws ruaj ntseg muaj cov arc thiab cais cov kev pheej hmoo, muab kev tiv thaiv siab tshaj plaws rau cov kab hluav taws xob sab saud. Yog li ntawd, nws yog cov cuab yeej ntawm kev xaiv rau substations thiab core faib hubs.
3. Ua tiav Kev Ua Haujlwm Ua Haujlwm rau 50-ms Ultra-Fast Trip: Los ntawm Kev Tshawb Nrhiav Tsis Txaus mus rau Kev Tiv Thaiv Daim phiaj
Rau lub switchgear kom ua tiav qhov kev txav mus los hauv 50 ms thaum lub sijhawm peb -theem luv luv, nrog rau kev tswj hwm kev ua haujlwm thiab kev tiv thaiv zoo, plaub theem tseem ceeb -nrhiav, xam, tua, thiab arc quenching- yuav tsum tau seamlessly integrated; tsis muaj leej twg yuav raug tshem tawm. Qhov no yog qhov laj thawj tseem ceeb vim li cas ntau cov khoom siv pa tsis ua raws li cov qauv no.
Ua ntej, millisecond -level fault detection. Los ntawm kev ua piv txwv tam sim no thiab qhov hluav taws xob tsis tu ncua los ntawm kev siab -txoj kev CTs thiab PTs, lub kaw lus meej meej ntes cov kev hloov pauv tam sim no ntawm cov yam ntxwv tam sim no ntawm lub voj voog luv luv, ua tiav qhov kev txiav txim txhaum cai hauv 10 ms, thiab tshem tawm kev ncua thiab kev txiav txim tsis raug. Thib ob, ultra- kev suav nrawm los ntawm kev tiv thaiv ntse. Kev tiv thaiv kev mus ncig sai sai ua haujlwm yam tsis muaj kev ncua; raws li kev txheeb xyuas qhov txhaum, nws tam sim ntawd teeb tsa cov lus txib mus txawv tebchaws, tshem tawm cov kauj ruam rov ua pov thawj kom txo qis lub sijhawm suav. Thib peb, ultra- nrawm nrawm los ntawm kev ua ntej - zog tshuab. Lub Circuit Court breaker lub caij nplooj ntoos hlav tseem nyob ua ntej -energized thiab nyob standby; Thaum tau txais cov lus txib, nws mus ncig tam sim ntawd, nrog lub sijhawm ua haujlwm txhua yam tswj tsis pub dhau 20 ms. Plaub, ua tau zoo arc{14}}quenching nyob rau hauv lub kaw- txheej txheem voj. Lub tshuab nqus tsev arc-quenching lossis optimized air arc{18}}quenching structures instantly extinguish the short-circuit arc thiab cais tag nrho cov faulted circuit, nrog rau tag nrho cov txheej txheem tswj nyob rau hauv lub 50-ms qhov rais tseem ceeb.
Nyob rau hauv tag nrho cov kab ke no, 12 kV switchgear ua tiav qhov sib npaug ntawm tus nqi -kev ua tau zoo thiab kev ceev los ntawm kev paub tab lub tshuab nqus tsev arc- tua tshuab; hlau-clad switchgear cia siab rau kho vajtse redundancy thiab cov qauv zoo kom ntseeg tau tias kev ua haujlwm ruaj khov nyob rau hauv kev ua haujlwm hnyav; hoscua - tawg switchgeartuaj yeem tsuas yog ua tau raws li 50 ms tawg lub sij hawm yuav tsum tau los ntawm kev sim tsis tu ncua, kev saib xyuas cov txheej txheem, thiab kev ua kom zoo ntawm cov chaw tiv thaiv.
IV. Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb: Pom tau raws li cov qauv, tab sis tsis tuaj yeem tiv taus peb - Theem luv Circuits
Ib tug loj tus naj npawb ntawm switchgear units ntawm - site raug kev txom nyem los ntawm qhov teeb meem ntawm "kev sib ntsib parameter qauv tab sis ua tsis tau tejyam nyob rau hauv tiag tiag ua hauj lwm." Txawm hais tias muaj ntau lub npe ntawm cov khoom siv qhia tias luv luv - Circuit Court breaking tsis nyob rau hauv specifications, ntev - lub sij hawm tsis tsim nyog kev khiav hauj lwm thiab kev tu, tsis tsim nyog qhov tseem ceeb, thiab kev laus mechanisms tiv thaiv lawv los ntawm kev ua tiav 50-millisecond ultra- tawg sai thaum ntsib nrog peb-theem luv luv Circuit Court.
Hauv qee cov huab cua qub-so switchgear, plua plav tsub zuj zuj thiab kev laus ntawm lub arc- tua cov kab sib txuas, ua ke nrog cov khoom siv sib tsoo, ua rau muaj kev ncua qeeb. Yog li ntawd, lub arc tseem kub hnyiab tom qab ib qho luv luv Circuit Court tshwm sim, tsis tsuas yog rhuav tshem cov cuab yeej nkaus xwb tab sis kuj ua rau muaj kev nce siab hauv cov khoom siv hluav taws xob sab saud; Nyob rau hauv ib co pa12 kV hloov, kev tiv thaiv kev teeb tsa raug teeb tsa tsis raug, nrog lub sijhawm Chaos- ncua cov kauj ruam ntawm qib siab thiab qis dua thiab qhov ua haujlwm sai sai ua haujlwm tsis taus, ua rau kev ua haujlwm qeeb thiab hla- theem tripping; txawm nyob hauv siab -kawghlau -clad switchgear, yog luv luv- kev txheeb xyuas tus yam ntxwv ntawm lub voj voog thiab kev saib xyuas lub tshuab tsis raug saib xyuas nyob rau lub sijhawm ntev, millisecond- theem kev ua haujlwm sib txawv yuav tshwm sim, ua rau poob ntawm ultra- muaj peev xwm tiv thaiv sai.
V. Yuav ua li cas thiaj paub tseeb tias Switchgear muaj 50-ms Ultra-Kev ceev "Kev Ua Haujlwm Tus Kheej + Daim phiaj tiv thaiv" muaj peev xwm?
Txhawm rau kom ntseeg tau tias lub tshuab hloov pauv tuaj yeem ua tiav nws lub luag haujlwm ntawm tus kheej - kev txi thiab tiv thaiv cov kab hluav taws xob sab saud thaum lub sijhawm peb tam sim no -theem luv luv, yuav tsum tsim kom muaj cov qauv kev ntsuas thiab kev saib xyuas raws li cov yam ntxwv ntawm peb hom khoom siv.
Rau 12 kV switchgear: Periodically calibrate cov chaw ntawm instantaneous overcurrent mus txawv tebchaws tiv thaiv kom txhob ncua - dawb triggering. Ntsuam xyuas lub Circuit Court breaker lub sij hawm tripping ib xyoos ib zaug kom ntseeg tau tias kev ua haujlwm thiab kev tiv thaiv cov lus teb tau sib koom ua ke, yog li tswj xyuas qhov pib mus txog 50 ms.
Raucua - tawg switchgear: Ua kom pom tseeb ntawm kev tshem tawm cov plua plav tawm ntawm qhov arc-quenching daim phiaj, tshuaj xyuas kev sib cuag, thiab ua kom zoo dua qhov arc-quenching ib puag ncig kom tiv thaiv arc re- ignition. Rau siab -kev pheej hmoo ua hauj lwm tej yam kev mob, hloov mus rau auxiliary ceev arc-quenching modules los them rau cov kev txwv ceev.
Rau cov hlau -clad switchgear: Leveraging qhov zoo ntawm nws cov qauv nyob rau hauv tag nrho, tsis tu ncua ua luv luv -circuit tiv thaiv kev ntsuam xyuas thiab millisecond- theem ua hauj lwm pov thawj los tswj cov cuab yeej ultra- ceev teb muaj peev xwm. Raws li cov khoom siv tiv thaiv kev tiv thaiv tseem ceeb rau daim phiaj hluav taws xob, nws txhawb nqa kev nyab xeeb ntawm daim phiaj hluav taws xob loj.
Xaus
Peb-theem luv- qhov xwm txheej hauv Circuit Court yeej tsis tuaj nrog ceeb toom ua ntej. Lub 50-millisecond ultra-fast tripping peev xwm ntawm switchgear tsis yog ib qho kev txwv tsis pub dhau, tab sis yog txoj kab kawg ntawm kev tiv thaiv rau lub zog faib hluav taws xob. Txawm hais tias nws yog qhov dav -lub hom phiaj 12 kV switchgear, qhib- hom cua- tawg switchgear, lossis hlau-clad switchgear nrog armored tiv thaiv, tus nqi tseeb ntawm cov cuab yeej yeej tsis tau nws cov khoom ruaj khov thaum lub sijhawm ua haujlwm ib txwm, tab sis nws lub peev xwm txiav txim siab los txwv kev puas tsuaj thaum muaj kev ua txhaum dheev tshwm sim. Kev ruaj ntseg ua haujlwm ruaj khov ntawm tag nrho cov phiaj xwm hluav taws xob los ntawm kev tswj hwm kev txi ntawm ib tus neeg siv khoom-qhov no yog qhov tseem ceeb tshaj plaws thiab tseem ceeb tshaj plaws kev nyab xeeb lub hom phiaj ntawm lub hwj chim switchgear.
Hais txog peb
Txij li thaum xyoo 2018, Zhejiang Lvma Electric Co., Ltd. tau ua lub npe ntseeg hauv kev tsim khoom siv hluav taws xob, hauv paus hauv 17 xyoo ntawm kev lag luam kev lag luam. Raws li ISO 9001: 2015-cov tuam txhab tau lees paub, peb cov khoom tseem ceeb suav nrog xeev- ntawm--art switchgear systems, ntxiv los ntawm cov roj hwm zoo{11}} raus thiab qhuav-hom faib transformers. Peb pab ntau tus neeg siv khoom thoob ntiaj teb thoob plaws Tebchaws Europe, Middle East, South America, Southeast Asia, thiab Africa.
Nrog rau pab pawg R & D muaj siab tuav ntau tshaj 40 patents, peb tab tom rov hais dua peb lub luag haujlwm los ntawm cov chaw tsim khoom lag luam rau tus neeg tsim khoom tshiab hauv kev txawj ntse thiab kev faib hluav taws xob ruaj khov. Los ntawm kev ua haujlwm digitalized ntau lawm thiab cov kev soj ntsuam ntse, peb muab kev nyab xeeb, txhim khu kev qha, thiab yav tom ntej - npaj cov kev daws teeb meem hluav taws xob.
Yog xav paub ntxiv, nyem lub pob hauv qab no kom xa peb cov lus ntiag tug.