Xaiv thiab Daim Ntawv Thov ntawm Fuse ceev Fuse
Kev xaiv thiab daim ntawv thov ntawm fuse ceev yog qhov txuas tseem ceeb hauv kev lag luam chlor-alkali, thiab kev teeb tsa ntawm cov fuse ceev hauv semiconductor fais fab rectification thiab kev tiv thaiv kev hloov yog qhov tseem ceeb heev. Thaum cov khoom siv ua tiav lawm, kev xaiv ntawm lub fuse ceev yuav cuam tshuam ncaj qha rau DC Rectification thiab kev hloov pauv xws li qhov zoo ntawm lub zog siv hluav taws xob thiab qhov siv tau ntawm kev siv hluav taws xob.
Fais hluav taws xob semiconductor cov khoom muaj lub peev xwm kub me me thiab yuav tsum muaj kev tiv thaiv los ntawm fuse ceev hauv lub xeev qhov kev txhaum, thiab fuse ceev muaj cov yam ntxwv thermal zoo ib yam li cov khoom siv hluav taws xob thiab muaj qhov khoom tiv thaiv zoo. Tshooj lus no yog hais txog kaw yam puv fuse ceev ceev, tsis muaj sab nraud tshwm sim hauv kev ua haujlwm.
1 Kev teeb tsa ntawm lub fuse ceev Kev teeb tsa ntawm lub fuse ceev hauv semiconductor zog rectifier kev tiv thaiv feem ntau muab faib ua 2 pawg.
1.1 Lub hauv paus sib txuas ntawm cov ceg ntoo hloov pauv tau nruab nrog hom tiv thaiv. Hom no yog tsuas yog siv rau kev tiv thaiv ntawm siab-zog thiab super-zog rectifiers. Thaum cov ceg hauv lub cuab yeej hloov pauv tau raug puas rau qee qhov laj thawj (txhua ceg ua raws lub zog ntawm cov khoom siv, feem ntau ob peb khub ntawm cov fuse ceev thiab cov khoom sib txuas ntawm cov xov hluav taws xob txuas nrog nyob rau hauv parallel, thiab daim duab 1 tsuas qhia 1 khub ntawm fuse ceev Rectifier thiab semiconductor rectifier Cheebtsam), tom qab lub fuse txuas nrog rau hauv series nrog kev tiv thaiv tau tawg, feem ntau tsuas yog ib lub cuab yeej ua tsis tiav, uas tsis cuam tshuam rau kev ua haujlwm ntawm tag nrho cov rectifier.
1.2 Txheeb-theem teeb tsa tag nrho kev tiv thaiv hom Hom no feem ntau yog siv rau kev tiv thaiv nruab nrab thiab me me fais fab tuag. Thaum lub cuab yeej hauv lub tshuab hloov hluav taws xob raug puas rau qee qhov laj thawj, tom qab fuse ceev tiv thaiv ntawm theem raug rhuav, kev tiv thaiv ntawm lub rectifier yuav txiav tawm lub hwj huam mov thiab nres nres lub zog rau qhov rectifier. Qhov kev teeb tsa no tsis yog nquag siv hauv kev lag luam chlor-alkali,
2 Qhov kev xaiv ntawm fuse ceev kuj tseem hu ua voltage thiab hom tam sim no. Cov kab hluav taws xob ntawm cov kab hloov pauv hloov yuav tsum qis dua qhov ntsuas hluav taws xob ntawm lub fuse ceev. Lub zog hluav taws xob ntawm cov khoom siv hluav taws xob thiab qhov nrawm fuse series luv-Circuit Court sim ua pov thawj, thiab lub tshuab hluav taws xob semiconductor tso tawm tam sim no yog khoo los ntawm cov coefficient raws li qhov ntsuas tam sim no ntawm kev xaiv fuse sai. Vim tias qhov ntsuas tus nqi ntawm qhov fuse sai yog qhov txiaj ntsig zoo, thiab qhov ntsuas siab tam sim no ntawm cov khoom siv semiconductor yog tus nqi nruab nrab, rau cov hais los saum toj no thawj hom kev teeb tsa (daim duab 1), rau thawj tiam ntawm cov khoom RS0, RS3 series (cov keeb kwm kev loj hlob ntawm cov fuse ceev hauv kuv lub teb chaws Nws tuaj yeem muab faib ua 4 ntu.Tub thawj cov qauv yog RS0 thiab RS3 series ua ke tsim los ntawm lub teb chaws. Cov tsis tau yog 480A, 750V lossis tsawg dua, thiab qhov peev xwm tawg yog 50kA. Nws yog cov khoom lag luam nrog cov ntim loj, tsis tshua muaj nqi thiab luv luv hluav taws xob lub neej.
Cov coefficient tuaj yeem raug xaiv raws li cov raj txuas hluav taws xob yog 1.4, transistor tau 1.2, thiab qhov hloov pauv sai yog 1. Piv txwv, ZP1000 tau nruab nrog 1400A ceev fuse. Rau cov txheej txheem thib ob hais txog kev teeb tsa (daim duab 2), lub fuse ceev tuaj yeem raug xaiv raws li lub valve tam sim no Iv thiab lub luag haujlwm thauj khoom ntawm lub hloov khoom siv, thiab tom qab ntawd cov fuse ceev nrog txaus rhuav muaj peev xwm xaiv tau raws li qhov siab tshaj txhaum qhov tam sim no tias lub rectifier yuav tsim, Xws li 50kA lossis 100kA, qhov twg 50kA tsim nyog thiab 100kA yog thawj-chav tsim khoom.
3 Kev siv cov yam ntxwv ntawm kev siv ceev ceev
3.1 Lub peev xwm dhau tam sim no Qhov tam sim no ntawm kev ceev fuse yog qhia los ntawm cov txiaj ntsig zoo, feem ntau cov qub dhau tam sim no yog 30% ～ 70% ntawm cov nominal rated tam sim no. Thaum lub fuse ceev siv lossis ib qho kawg yog rhuab los ntawm cov khoom siv semiconductor thiab lwm qhov kawg tau txias los ntawm lub thawv dej-ua kom dej txias, lossis ob sab tau raug txias los ntawm dej-txias ua kom dej txias; los yog yuam cua txias yog siv los tswj qhov kub nce kom tswj tau qhov tam sim no dhau kev. Cov xwm txheej sib txuas ntawm qhov txuas ceev fuse nyob hauv lub rectifier ncaj qha cuam tshuam qhov kub nce siab thiab cia siab ua haujlwm ntawm cov fuse ceev. Vim li no, qhov chaw tiv tauj yuav tsum tau ceev kom zoo thiab huv. Yog tias qhov chaw tiv tauj ntawm pob hlau tsis tau npaj yuav tsum tshem tawm cov oxide txheej, lub zog sau tseg yuav tsum tau muab thaum lub sijhawm teeb tsa, thiab nws yog qhov zoo tshaj kom ua rau qhov chaw tiv thaiv kev puas tsuaj. Thaum uas tig mus sai fuses yuav tsum xyuas txog qhov voltage poob ntawm qhov sib chwv ib sab los ntawm ib qho.
3.2 Kev ntsuas kub nce thiab lub zog ntawm qhov fuse ceev Lub zog siv ntawm fuse ceev W=ΔUIw; ΔU=f (Iw) qhov twg: Iw --- ua haujlwm tam sim no; U --- voltage poob ntawm qhov fuse ceev. Lub zog noj ntawm lub fuse ceev muaj qhov kev sib raug zoo nrog nws cov txias txias. Xaiv cov fuse ceev nrog qhov sib kis txias me me tau txais txiaj ntsig zoo los txo qhov kub nce siab, vim hais tias lub peev xwm dhau mus tam sim no tsuas yog txwv los ntawm qhov kub nce. Raws li tau hais dhau los, qhov sib txuas ntawm qhov txuas ntawm fuse sib txuas kuj cuam tshuam qhov kub nce ntawm lub fuse ceev, thiab nws yog qhov yuav tsum tau hais tias qhov kub nce ntawm qhov fuse sib koom tes yuav tsum tsis txhob cuam tshuam kev ua haujlwm ntawm nws cov khoom sib txuas. Cov kev sim tau ua pov thawj tias cov fuse ceev tuaj yeem ua haujlwm ntev ntev thaum kub nce tsawg dua 80 ℃, thiab cov khoom lag luam nrog cov txheej txheem tsim khoom ruaj khov tseem tuaj yeem khiav mus ntev thaum kub nce siab yog 100 ℃. Qhov kub siab nce txog 120 ℃ yog qhov tseem ceeb ntawm qhov muaj peev xwm dhau tam sim no, yog tias qhov kub nce mus txog 140 Thaum ℃, fuse ceev tsis tuaj yeem khiav mus ntev.
Tam sim no, kev lag luam chemical feem ntau siv cov thawv dej txias thiab dej txias ua kom cov cua txias kom txo tau qhov kub nce ntawm fuse ceev. Cov dej txias rau chaw nres tsheb yog qhov tshwj xeeb tshaj yog rau cov hluav taws xob qis uas siv hluav taws xob zoo xws li 400-600V. Qhov kub sib txawv ntawm lub davhlau ya nyob twg ntawm lub fuse ceev thiab kev sib txuas kawg ntawm dej-txias cov busbar feem ntau yog 1.0 ～ 2.0 ℃. Ntau qhov kev siv hluav taws xob nrawm nrawm tsim rau cov dej-ua kom txias, yog li cov neeg siv yuav tsum sab laj nrog cov chaw tsim khoom ua ntej siv. Huab cua txias kuj tseem yog txoj hauv kev zoo los txo qhov ntsuas kub kom nce siab. Raws li cov cua nrawm dua lub peev xwm nkhaus, txiav txim siab cawv ntawm cua ceev ntawm qhov kub nce ntawm fuse ceev. Thaum cua ceev ceev txog 5m / s, lub peev xwm ntws tawm feem ntau tuaj yeem nce li 25%. Yuav tsis muaj qhov tshwm sim pom tseeb. Raws li qhov voltage poob nkhaus ntawm lub fuse ceev tau muab los ntawm cov chaw tsim khoom thiab lub zog noj ntawm qhov ntsuas tam sim no, ntsuas qhov ntsuas hluav taws xob poob nruab nrab ntawm ob qhov kawg ntawm qhov fuse tuaj yeem ceev xam qhov tseeb tam sim no ntawm ceg. Tsis tas li ntawd, nyob rau hauv tib txoj kev khiav tawm tam sim no, qhov kub nce ntxiv kuj tseem cuam tshuam txog seb qhov fuse ceev siv ib zaug lossis ob qho kev sib txuas. Advanced industrial ev fuse, DISSMANN fuse yog thawj qhov kev xaiv.
Feem ntau ntawm cov hluav taws xob muaj zog rectifiers tsim nyob hauv lub teb chaws siv ob npaug rau cov hluav taws xob sib txuas zoo txuas nrog cov khoom siv hluav taws xob, xws li 700A × 2, 1400A × 2, 2500A × 2. Muab ob npaug rau ob tog txuas ntawm cov fuse davhlau ya nyob twg tuaj yeem ua tau kom nyias li tsawg dua kom txo cov ua haujlwm. Ib hom ob chav sib txuas ceev ceev fuse txuas nrog bolts thiab txuas daim hlau, thiab lwm qhov yog tus qauv uas txuas cov paib (cov davhlau ya nyob twg) thiab ob lub melts (terminals) yog welded ua ke. Cov hom qauv no tau ua ntau dua. Lub high-voltage ceev ceev fuse muaj lub zog loj hauv nruab nrog, tshwj xeeb tshaj yog rau cov khoom lag luam siab dua 800V. Vim tias lub tes tsho plooj (porcelain) lub tes tsho muaj qee qhov ntev thiab qhov chaw loj, thiab lub tshav kub uas tsim los ntawm cov yaj tau ua thiab yaj ntawm qhov muab tub lim thiab lub plhaub, qhov hluav taws xob siab yog qhov ceev ceev Cov cua-txias ua haujlwm ntawm lub fuse yog pom tseeb dua.
3.3 Kev xaiv ntawm lub peev xwm tawg Lub plhaub lub zog ntawm lub fuse ceev mus rau ntau qhov txiav txim siab tawg lub peev xwm ntawm qhov siab tshaj qhov txhaum tam sim no. Qhov thib ob, cov duab ntawm cov hlau txuas sab hauv lub fuse ceev, lub peev xwm ntawm qhov muab tub nqus kom nqus hlau vapor thiab kub, thiab electromotive lub zog ntawm fuse tag nrho cuam tshuam rau lub peev xwm tawg. Thaum tsim cov rectifier, cov theem-rau-theem luv-luv tam sim no ntawm" rectifier transformer" yuav tsum tau muab xam, thiab fuse ceev nrog qhov muaj peev xwm tawg txaus yuav tsum tau xaiv raws li qhov tam sim no. Lub fuse ceev nrog qhov tsis txaus ntseeg muaj peev xwm yuav txuas ntxiv mus rau arc kom txog rau thaum nws tawg, thiab hauv qhov xwm txheej loj yuav ua rau AC thiab DC luv lub voj voog, yog li qhov ntsuas siab tawg lub peev xwm yog qhov ntsuas kev nyab xeeb.
Tsis tas li ntawd, kev tawg ntawm cov khoom lag luam kuj tseem yog ib qho ua rau cuam tshuam nrog lub peev xwm tawg. Qhov teeb meem uas yooj yim tsis quav ntsej yog lub zog hluav taws xob ntawm txoj kab hauv qhov txhaum ntawm qhov luv luv, vim hais tias arc lub zog tsim thaum lub fuse ceev tawg tau muaj kev sib raug zoo nrog qhov inductance ntawm Circuit Court. Thaum ntawm kab fais fab kis cosφ< 0.2,="" qhov="" tawg="" qhov="" muaj="" peev="" xwm="" muaj="" qhov="" tshwj="" xeeb="" siab.="" lub="" zog="" thaum="" lub="" fuse="" ceev="" tawg="" yog="" wo="Wa" +="" wr="" +="" w1="" qhov="" twg:="" wa="" ---="" arc="" zog;="" wr="" ---="" tsis="" kam="" noj="" lub="" zog;="" w1="" ----="" kab="" inductance="" tso="" lub="" zog.="" thaum="" lub="" peev="" xwm="" tawg="" tau="" raws="" li="" qhov="" yuav="" tsum="" tau="" ua="" ntawm"="" rectifier",="" nws="" tseem="" ceeb="" heev="" kom="" nco="" ntsoov="" tias="" lub="" siab="" ntawm="" tus="" nqi="" hluav="" taws="" xob="" arc="" thaum="" lub="" sijhawm="" tawg="" (hu="" ua"="" zaus="" hloov="" hluav="" taws="" xob="" voltage"="" hauv="" tus="" qauv="" )="" yuav="" tsum="" tsis="" txhob="" siab="" dhau,="" thiab="" nws="" yuav="" tsum="" tau="" txwv="" thaum="" lub="" sijhawm="" kev="" tsim="" cov="" fuse="" kom="" ua="" rau="" nws="" qis="" dua="" ntawm="" qhov="" ua="" hluav="" taws="" xob="" (semiconductor)="" tus="" nqi="" siab="" tshaj="" plaws="" uas="" cov="" cuab="" yeej="" tuaj="" yeem="" tiv="" thaiv,="" txwv="" tsis="" pub="" lub="" semiconductor="" ntaus="" ntawv="" yuav="" raug="" puas="" ntsoog.="" yog="" li="" ntawd,="" lub="" fuse="" nrog="" lub="" sijhawm="" luv="" tshaj="" plaws="" tawg="" tsis="" yog="" qhov="" tsim="" nyog="" tshaj="" plaws.="" thaum="" lub="" fuse="" ceev="" siv="" nyob="" rau="" hauv="" lub="" dc="" circuit="" court,="" vim="" tias="" tsis="" muaj="" voltage="" xoom="" hla="" kev="" hla="" thaum="" lub="" sijhawm="" dc="" rhuav="" tshem,="" qhov="" no="" yog="" qhov="" xwm="" txheej="" rau="" qhov="" cuam="" tshuam="" ntawm="" qhov="" fuse="" ceev,="" yog="" li="" feem="" ntau,="" yog="" tias="" lub="" fuse="" ceev="" siv="" nyob="" rau="" hauv="" dc="" circuit="" court="" tsuas="" yog="" 60%="" ntawm="" qhov="" ntsuas="" hluav="" taws="" xob="" ntawm="" qhov="" fuse="" ceev="" tau="" siv,="" thiab="" nws="" yog="" qhov="" zoo="" tshaj="" plaws="" los="" siv="" dc="" ceev="">
3.4 I2t xaiv Lub sijhawm fuse t ntawm lub fuse tau hais txog qhov loj me ntawm fusing tam sim no I, thiab nws cov kev cai lij choj yog qhov sib npaug tsis ncaj rau cov xwm txheej tam sim no. Daim duab 3 qhia txog kev sib txheeb ntawm nkhaus ntawm t∞1 / I2, uas yog hu ua tus thib ob-ampere yam ntxwv ntawm kev fuse.
Lub fuse ceev ceev, kev qhia tshwj xeeb qauv 750V series, hluav taws xob tsawg fuse
Vim tias txhua yam khoom siv hluav taws xob (suav nrog cov xaim hluav taws xob) muaj qee qhov muaj peev xwm dhau, thaum lub overload yog lub teeb, nws tuaj yeem tso cai kom khiav mus ntev, thiab thaum muaj qee qhov overload ntau dhau, qhov fuse yuav tsum tau tshuab hauv ib lub sijhawm. Thaum xaiv fuse los tiv thaiv overload thiab luv luv-Circuit Court, koj yuav tsum nkag siab txog qhov sib tshooj ntawm cov khoom siv hluav taws xob kom tus xeeb ceem no ua tau zoo nyob rau hauv kev tiv thaiv kev tiv thaiv fuse' s thib ob-ampere yam ntxwv. Nws tuaj yeem pom los ntawm Daim Duab 3 tias lub sijhawm ntawm lub sijhawm fusing tam sim no Io yog qhov thev tsis txaus ntseeg, uas yog hu ua qhov tsawg kawg melting tam sim no lossis qhov tseem ceeb tam sim no, uas yog, qhov tam sim no los ntawm yaj yog tsawg dua tus nqi tseem ceeb thiab nws yuav tsis yog fused. Yog li ntawd, cov kab ntsuas tam sim no Ie ntawm cov xaiv xaiv yaj yuav tsum tsawg dua Io; feem ntau piv ntawm Io rau Ie yog 1.5 txog 2.0, uas yog hu ua melting coefficient. Cov pa roj carbon monoxide no muaj qhov txawv txav ntawm cov yam ntxwv ntawm fuse thaum thau khoom dhau. Yog tias cov fuse yog los tiv thaiv qhov sib tshooj me me tam sim no, lub siab yaj yuav tsum qis dua; txhawm rau kom zam lub luv luv overcurrent thaum lub cev muaj zog pib yaj, cov yaj melting yuav tsum yog Taller. Tom qab lub fuse ceev tam sim no dhau lub peev xwm ua tau raws li cov kab hluav taws xob luv luv tam sim no yuav tsum, nws tuaj yeem cais cov txhaum tam sim no thaum lub luv luv Circuit Court txhaum, tab sis seb nws tuaj yeem tiv thaiv cov khoom siv hluav taws xob txuas txuas nrog hauv yuav tsum ntsuas I2t tus nqi ntawm ob. Tsuas yog thaum I2t tus nqi ntawm cov fuse ceev tseem me dua I2t tus nqi ntawm cov khoom siv semiconductor, tuaj yeem ua cov semiconductor ntaus ntawv tiv thaiv. I2t tus nqi thaum lub sij hawm luv luv Circuit Court raug faib ua ob theem, uas yog, ua ntej arc I2t thiab fusing I2t. Lub sijhawm rau cov hlau nchuav los ua kom dhau los ntawm cov khoom ua kua yog lub sijhawm ua ntej, li ntawm 1.0 txog 2.0 ms, uas tuaj yeem suav ua qhov txheej txheem adiabatic. Lub sij hawm sib xyaw ntawm cov hluav taws xob tam sim no tsim los ntawm cov fuse ceev thaum lub sijhawm no yuav raug txiav txim siab raws li qhov muaj nuj nqis, uas tau txiav txim siab los ntawm kev tsim. Tus nqi ua ntej arc I2t tus nqi sib txawv rau cov khoom sib txawv, thiab nws yog tus tas mus li rau txhua qhov khoom siv. Thaum cov hlau molten ua vapor, lub arc pib zes, thiab qhov tam sim no poob qis los ntawm qhov kev txwv tam sim no mus rau xoom thaum lub sijhawm ua haujlwm. Lub I2t nyob rau theem no yog fusing I2t, uas yog tus hloov pauv. Tus txheej txheem no feem ntau yog nyob ntawm qhov muab tub lim raug corroded kom nqus tau lub zog.
Hauv kev tsim qauv ntawm lub fuse ceev, txhawm rau kom ua tau raws li qhov txuas ntxiv ntawm qhov ntsuas tam sim no ntawm cov khoom siv hluav taws xob ntau, ntau yam kev ntsuas yuav tsum tau ua, tsis txhob siv cov kev siv lej los xaiv cov fuse ceev. Cov kev sim tau ua pov thawj tias thaum qhov ntsuas tam sim no ob npaug, I2t tus nqi ntawm cov fuse ceev yog 4 npaug ntawm qhov qub, thaum qhov nce ntawm I2t tus nqi ntawm cov khoom siv semiconductor ntau me dua. Nws yog qhov nyuaj dua los txo tus nqi I2t ntawm cov fuse ceev, tsuas yog muaj ntau yam kev ntsuas yuav tsum tau ua, xws li kev tsim nyog fuse faib tawm, luv qhov ntev ntawm lub yaj, txo qhov daim phiaj arc thiab txhim kho qhov arc extinguishing muaj peev xwm ntawm arc extinguishing. khoom siv. I2t tus nqi yog ib qho ntawm cov cim tseem ceeb ntawm xaiv fuse ceev.
3.5 rwb thaiv tsev tsis kam tiv thaiv Kev ntsuas tiv thaiv lub rwb thaiv tsev tiv thaiv tom qab fuse ceev tawg tau pov thawj los ntawm kev paub txog nws tseem ceeb heev. Cov ntsev ntsev thiab ntsev cov ntsev ntsev tau ntxiv rau cov khoom lag luam ntau thaum xyoo 1990, thiab cov ntsev ntsev muaj peev xwm txhim kho qhov peev xwm tawg ntawm daim phiaj arc. Qhov rwb thaiv tsev tsis kam ntawm cov hluav taws xob tsis zoo sai yog feem ntau qis dua 0.3MΩ tom qab tawg, thiab txawm tias txau. Nyob rau hauv cov xwm txheej tshwj xeeb, qhov txhaum yuav txiav tawm thiab ua tus kav tom qab lub sijhawm, uas yuav ua rau muaj kev txhaum ntau dua. Qhov ua tau zoo zoo fuse (nrog rau cov ntsev ntsev ntsev thiab sodium ntsev) yuav tsum tsim rwb thaiv tsev tsis pub dhau 0.5MΩ lossis ntau dua tom qab tawg. Lub fuse ceev tuaj yeem ncav cuag qhov rwb thaiv qhov siab loj dua 1-30MΩ tom qab 10 feeb ntawm kev tawg, uas tuaj yeem raug txiav txim siab kom muaj kev ntseeg tau zoo. Tsis tas li ntawd, thaum siv fuse ceev, nws lub neej thiab kev ntseeg tau yuav tsum tau txais kev txiav txim siab; lub rwb thaiv kev ntsuas qhov ntsuas tom qab tawg (GG gt; 0.5MΩ); qhov qis qis tshaj plaws kev xa rov qab voltage; cov khoom lag luam nrog kev ua yuam kev tsis pom tsis siv.