Kev nkag siab tag nrho cov khoom siv yog qhov tseem ceeb tshaj plaws hauv kev tiv thaiv cov khoom siv hluav taws xob. Yog tsis muaj kev tiv thaiv hluav taws xob txhim khu kev qha, cov chaw hluav taws xob hauv kev lag luam thiab kev lag luam yuav ntsib kev puas tsuaj loj heev rau cov khoom siv, kev phom sij ntawm hluav taws thiab kev pheej hmoo ntawm kev kaw mus sij hawm ntev.
Cov lus qhia ntxaws no yuav piav qhia txog qhov sib txawv ntawm nws thiab Miniature circuit breakers / MCBs, thiab muab cov lus qhia yuav khoom los pab koj xaiv lub circuit breaker zoo rau ib daim ntawv thov tshwj xeeb.
Moulded Case Circuit Breaker yog dab tsi?
Cov khoom siv hluav taws xob uas muaj pwm (MCCBs) yog cov khoom siv hluav taws xob qis uas tsim los tiv thaiv cov hluav taws xob los ntawm kev thauj khoom ntau dhau, luv luv, thiab kev ua yuam kev. Lawv feem ntau tswj tau 15A txog 2,500A nrog 2-4 tus ncej, muab tso rau hauv cov yas thermoset uas ruaj khov thiab pwm kom muaj kev nyab xeeb. Cov yam ntxwv tseem ceeb suav nrog cov khoom siv hluav taws xob thermal-magnetic lossis electronic trip, nrog rau kev xaiv rau kev teeb tsa ruaj khov lossis kho tau, feem ntau siv rau hauv cov panelboards, switchgear, thiab kev tswj lub cev muaj zog.
Lub Molded Case Circuit Breaker Ua Haujlwm Li Cas?
Yuav kom nkag siab txog yuav ua li cas thiaj li siv tau MCCB kom raug, peb yuav tsum xub nkag siab txog qhov teeb meem tseem ceeb: lub molded case circuit breaker ua haujlwm li cas hauv qab cov khoom siv hluav taws xob siab?
Lub MCCB vam khom lub tshuab tso tawm ua ke los daws ntau hom kev ua txhaum hluav taws xob . Feem ntau cov MCCB txheem siv cov chav thermal-magnetic trip, thaum cov qauv siab dua siv cov chav hluav taws xob (microprocessor) trip.
Kev Tiv Thaiv Thermal Tshaj Kev Tiv Thaiv
Qhov overload yog tshwm sim los ntawm lub kaw lus siv lub zog hluav taws xob ntev dua li qhov muaj peev xwm ntsuas. MCCB ua haujlwm nrog bimetal trips rau cov teeb meem zoo li no. Thaum lub zog hluav taws xob tshaj qhov kev nyab xeeb, qhov cua sov tsim tawm ua rau bimetal trip khoov, uas ua rau lub cev thawb lub pas nrig kom txiav lub voj voog. Vim tias qhov cua sov ntawm daim hlau siv sijhawm, lub tshuab ncua sijhawm tau tsim los tiv thaiv lub voj voog breaker los ntawm tripping nyob rau hauv ib qho luv luv tam sim no hloov pauv (xws li lub cev muaj zog pib).
Kev Tiv Thaiv Luv Luv Sib Nqus
Thaum muaj kev cuam tshuam loj heev, lub luv luv Circuit yuav tsim cov tam sim ntawd loj heev. Lub sijhawm no, cov lus teb ntawm daim ntawv bimetallic thermosensitive tsis nrawm txaus thiab tsis tuaj yeem cuam tshuam raws sijhawm. Lub kauj electromagnetic hauv MCCB yog lub luag haujlwm rau kev daws qhov teeb meem no. Lub luv luv tam sim no loj heev ntws los ntawm lub kauj, tsim kom muaj lub zog magnetic muaj zog, rub tawm lub pas nrig tso tawm tam sim ntawd, txiav qhov kev sib cuag hauv milliseconds, thiab txiav tawm lub zog ua ntej cov hlau yaj.
Arc Tua Hluav Taws Xob
Thaum cov kev sib cuag sab hauv ntawm lub tshuab hluav taws xob raug sib cais hauv qab lub zog hluav taws xob, yuav muaj ib qho arc. Lub MCCB muaj lub chamber tua arc, uas yog tsim los ntawm cov ntawv hlau sib luag, uas tuaj yeem faib, txias thiab tua arc hauv lub plhaub yas rwb thaiv tsev.
Miniature Circuit Breakers (MCB) vs. Molded Case Circuit Breaker: Qhov txawv yog dab tsi?
Cov thawj coj ntawm cov chaw thiab cov neeg yuav khoom siv hluav taws xob feem ntau nug tias: Vim li cas thiaj yuav tsum siv MCCB es tsis txhob siv MCB ib txwm?
Ob lub cuab yeej no muab kev tiv thaiv hluav taws xob yooj yim, tab sis muaj qhov sib txawv tseem ceeb hauv lub peev xwm, kev hloov kho tau thiab ib puag ncig siv tau. Cov khoom siv hluav taws xob me me (MCBs) feem ntau yog siv rau hauv cov chaw siv hluav taws xob tsawg xws li cov chaw nyob lossis cov chaw ua haujlwm lag luam me, thaum MCCBs yog tsim los rau cov ntawv thov hnyav. Cov ntsiab lus ntawm qhov sib txawv tuaj yeem xa mus rau hauv cov lus hauv qab no.
| feature | Moulded Case Circuit Breaker | Miniature Circuit Breaker |
|---|---|---|
| Kev ntsuas tam sim no | Txog li 2,500 A (feem ntau yog 100 A–2,500 A) | Txog li 125 A (feem ntau yog 0.5 A–63 A) |
| Rhuav Txoj Kev Peev Xwm | Siab; feem ntau 25 kA txog 200 kA ntawm 415 V AC | Qis; feem ntau 6 kA txog 25 kA ntawm 230/400 V AC |
| Voltage Kev Ntsuam Xyuas | Txog li 690 V AC/500 V DC, tsim nyog rau cov kab ke hluav taws xob siab dua | Feem ntau 230/400 V AC, tsim rau cov voj voog kawg uas tsis muaj zog |
| Adjustable Trip Settings | Yog; feem ntau kho tau qhov kub lossis nrog cov chav hluav taws xob mus ncig rau kev tiv thaiv overload thiab luv luv | Feem ntau ruaj khov; tsis kho tau thermal-magnetic trip curve |
| Qhov Loj & Daim Ntawv Qhia | Loj dua, hnyav dua, tiv thaiv los ntawm lub thawv pwm; xav tau ntau qhov chaw vaj huam sib luag | Me me, modular, lub teeb yuag; snaps rau ntawm tus qauv DIN rail (feem ntau 17.5 hli ib tug ncej) |
| Cov Khoos phaub Siv | Cov laug cam faib khoom loj, cov voj voog pub mov, kev tiv thaiv lub cev muaj zog, cov vaj huam sib luag tswj kev lag luam, thiab kev tiv thaiv cov khoom siv loj | Cov voj voog ceg, teeb pom kev zoo hauv tsev, cov qhov hluav taws xob, cov khoom siv rau cov neeg siv khoom, thiab cov vaj huam sib luag me me rau kev lag luam |
Cov ntawv thov ntawm Molded Case Circuit Breaker
Vim nws muaj peev xwm siab thiab hloov kho qhov chaw tripping, MCCB raug suav hais tias yog cov khoom siv tseem ceeb ntawm cov kab ke faib khoom niaj hnub thiab siv dav hauv cov lag luam hauv qab no:
- Cov tsev lag luamCov chaw ua lag luam loj xav tau lub vaj huam sib luag faib khoom loj los muab hluav taws xob rau HVAC cov kab ke, cov tshuab nqa khoom thiab cov kav dej teeb pom kev zoo. MCCB tiv thaiv tag nrho cov vaj huam sib luag faib khoom me me ua lub tshuab hluav taws xob tseem ceeb.
- Kev tsim khoom lag luamCov tshuab hnyav (xws li cov tshuab hluav taws xob loj) yuav tsim cov hluav taws xob siab heev thaum pib. Lub Molded Case Circuit Breaker uas hloov tau tuaj yeem teeb tsa nws cov kev tiv thaiv kom nws tsis ua haujlwm vim yog cov hluav taws xob luv luv no, thaum txuas ntxiv muab kev tiv thaiv luv luv uas ntseeg tau.
- Lub zog rov ua dua tshiab (hnub ci/cua)Lub zog uas tsim los ntawm cov inverters hnub ci thiab cov turbines cua yuav tsum tau muab tso rau hauv lub grid kom muaj kev nyab xeeb. Cov DC thiab AC MCCBs tshwj xeeb yog siv los cais ntau qhov ntawm lub tshuab fais fab, yog li ua kom muaj kev nyab xeeb thaum lub sijhawm kho.
- Cov ntaub ntawv chawLub sijhawm ua haujlwm ib txwm ntawm lub chaw khaws ntaub ntawv yog qhov tseem ceeb heev. Lub MCCB siab kawg uas muaj cov chav hluav taws xob tripping ua rau muaj kev tiv thaiv xaiv tau zoo: thaum ib lub txee server tsis ua haujlwm, tsuas yog lub tshuab hluav taws xob ntawm lub txee ua haujlwm, thiab lwm qhov chaw tseem ua haujlwm ib txwm.
Yuav ua li cas xaiv qhov zoo tshaj plaws Circuit Breaker raws li koj xav tau?
Thaum xaiv cov khoom siv tiv thaiv hluav taws xob tsim nyog, nws tsis yog tsuas yog qhov teeb meem sib phim tam sim no uas yuav tsum tau them sai sai rau. Yuav kom txiav txim siab yuav khoom zoo tshaj plaws, cov kev teeb tsa ntawm lub voj voog hluav taws xob yuav tsum tau soj ntsuam kom zoo raws li qhov yuav tsum tau ua ntawm lub kaw lus.
Yuav tsum xav txog tej yam tseem ceeb:
- Rated tam sim no (hauv): hais txog qhov siab tshaj plaws tam sim no uas lub tshuab hluav taws xob tuaj yeem nqa tau yam tsis muaj kev cuam tshuam. Nws yog qhov tsim nyog los xyuas kom meej tias qhov ntsuas tam sim no ntawm lub tshuab hluav taws xob sib phim nrog lub peev xwm ua haujlwm zoo ntawm kab thiab qhov thauj khoom txuas nrog.
- Qhov kawg luv luv-circuit tawg peev xwm (Icu): yog hais txog qhov siab tshaj plaws ntawm qhov txhaum tam sim no uas lub circuit breaker tuaj yeem tawg tau zoo. Tus nqi Icu (hauv kiloamperes kA) qhia txog qhov siab tshaj plaws ntawm qhov luv luv tam sim no uas lub circuit breaker tuaj yeem tshem tawm ib zaug. Lub circuit breaker tej zaum yuav tsum tau hloov tom qab qhov txhaum theem Icu tshwm sim.
- Kev ua haujlwm luv luv-circuit tawg peev xwm (Ics): hais txog qhov siab tshaj plaws ntawm qhov txhaum tam sim no uas lub circuit breaker tuaj yeem tshem tawm thiab txuas ntxiv ua haujlwm li qub tom qab qhov txhaum. Cov khoom MCCB nrog Ics sib npaug rau 100% Icu yuav tsum tau xaiv rau cov ntawv thov kev lag luam tseem ceeb.
- Tus naj npawb ntawm ncej: paub meej tias lub kaw lus yog ib theem (1-ncej lossis 2-ncej) lossis peb theem (3-ncej lossis 4-ncej).
- Hom chav tsev mus ncigtxiav txim siab seb puas yuav tsum xaiv lub tshuab hluav taws xob thermal-magnetic yooj yim (rau kev tiv thaiv tus qauv) lossis lub tshuab hluav taws xob / microprocessor nyuaj (rau kev ntsuas kom raug, kev kuaj mob thiab kev sib txuas lus nrog software tswj chaw).
Yuav ua li cas thiaj li tswj tau koj lub Circuit Breaker kom zoo?
Vim li cas lub tshuab hluav taws xob thiaj li ua tsis tau haujlwm thiab yuav ua li cas thiaj tiv thaiv tau? Txawm tias lub MCCB zoo tshaj plaws kuj xav tau kev saib xyuas tas li kom thiaj li ua haujlwm tau zoo thaum muaj xwm txheej ceev.
Kev Tshuaj Xyuas Qhov Zoo Li Cas : xyuas kom tseeb tias lub plhaub yas puas muaj xim tsis zoo, tawg lossis hlawv. Yog tias muaj kev hloov pauv ntawm lub cev qhia tau tias lub tshuab hluav taws xob raug kub dhau thiab yuav tsum tau hloov.
Kev sim tshuab : hmoov av thiab kev tsis ua haujlwm ntev yuav ua rau cov khoom siv sib txuas sab hauv daig. Thaum lub sijhawm kaw, lub tshuab hluav taws xob raug cais thiab kaw ntau zaus kom ntseeg tau tias lub tshuab ua haujlwm zoo.
Kev ntsuas duab thermal : thaum lub sijhawm ua haujlwm ib txwm, qhov kub ntawm lub circuit breaker terminal raug kuaj xyuas los ntawm lub infrared thermal imager. Qhov kub nce tsis zoo qhia tias qhov kev sib txuas xoob, uas yuav ua rau muaj kev tiv thaiv ntau ntxiv thiab thaum kawg ua rau hlawv tawm.
Kev ntsuas kev tshaj lij : rau MCCB uas muaj lub tshuab hloov kho tau, cov kws tshaj lij tsim nyog yuav tsum siv cov khoom siv txhaj tshuaj tam sim no txhua ob peb xyoos los xyuas seb lub tshuab hluav taws xob puas ua haujlwm raws li cov kev teeb tsa.
Yog xav paub ntxiv txog kev teeb tsa lub circuit breaker, thov nyeem:
xaus
Nws yog ib qho tseem ceeb heev rau cov engineers, cov thawj coj ntawm chaw ua haujlwm thiab cov neeg yuav khoom siv hluav taws xob kom nkag siab txog kev ua haujlwm thiab kev siv cov molded case circuit breakers. Nws yog ib qho pab tau los tsim ib lub zog fais fab muaj zog, muaj kev nyab xeeb thiab txhim khu kev qha los ntawm kev piav qhia txog nws qhov txawv ntawm miniature circuit breaker (MCB) thiab xam qhov muaj peev xwm tam sim no luv luv uas xav tau. Txawm tias nruab rau cov chaw khaws ntaub ntawv thev naus laus zis siab lossis cov chaw tsim khoom hnyav, kev xaiv lub circuit breaker zoo ua kom muaj kev ua haujlwm zoo thiab tiv thaiv tib neeg thiab khoom vaj khoom tsev los ntawm kev phom sij hluav taws xob.
FAQ
Qhov txawv ntawm MCCB thiab lwm yam circuit breakers yog dab tsi?
Hauv Tebchaws Meskas, qhov sib txawv tseem ceeb ntawm lub tshuab hluav taws xob molded case circuit breaker (MCCB) thiab lwm yam breakers (zoo li cov qauv hauv koj lub tsev lossis cov khoom siv hnyav) yog nyob rau hauv qhov loj me, kev hloov kho tau, thiab kev siv. Xav txog MCCB ua qhov "hnyav" version ntawm tus qauv breaker uas koj pom hauv vaj huam sib luag nyob. Thaum lub tshuab hluav taws xob hauv tsev txheem yog tsim los rau kev tiv thaiv tam sim no qis thiab yooj yim, MCCB yog lub tshuab ua haujlwm ntau yam rau kev lag luam thiab kev lag luam.
Kuv yuav xaiv lub tshuab hluav taws xob molded case li cas rau kuv lub tshuab hluav taws xob?
Kev xaiv lub molded case circuit breaker (MCCB) uas zoo tsis yog tsuas yog xaiv qhov ntsuas amp xwb - nws yog hais txog kev sib phim lub breaker rau koj tus cwj pwm hluav taws xob tag nrho. Yog tias koj hla cov kev teeb tsa tseem ceeb, koj tuaj yeem xaus nrog kev cuam tshuam, kev tiv thaiv tsis muaj kev nyab xeeb, lossis kev tshuaj xyuas tsis ua tiav.
Cov yam ntxwv tseem ceeb ntawm cov molded case circuit breakers yog dab tsi?
Cov khoom siv hluav taws xob uas muaj pwm (MCCBs) yog cov khoom siv tiv thaiv hluav taws xob uas siv feem ntau hauv kev lag luam thiab kev lag luam los tiv thaiv cov hluav taws xob los ntawm kev thauj khoom ntau dhau thiab luv luv. Lawv qhov tshwj xeeb yog lawv lub tsev ruaj khov, rwb thaiv tsev ua los ntawm iav polyester lossis thermoset resin, uas tiv thaiv cov khoom sab hauv los ntawm cov yam ntxwv ib puag ncig xws li hmoov av, dej noo, thiab kev cuam tshuam.
Lub tshuab hluav taws xob molded case txheem muaj dab tsi?
Ib lub tshuab hluav taws xob molded case circuit breaker (MCCB) muaj ib lub tsev rwb thaiv tsev molded, ib lub tshuab ua haujlwm (toggle handle), ib lub trip unit (thermal-magnetic lossis electronic), thiab cov contacts hauv ib lub arc chamber. Nws tiv thaiv cov kab ke hluav taws xob los ntawm kev overloads thiab luv circuits los ntawm kev txiav txim siab tam sim no.
