APeb Theem Tam Sim No Transformeryog ib qho cuab yeej transformer tsim los ntsuas hluav taws xob tam sim no nyob rau hauv peb-theem fais fab system. Cov cuab yeej no ua tau zoo txo qis cov thawj tam sim no mus rau qis dua, tus qauv theem nrab tam sim no, feem ntau 1A lossis 5A. Qhov ntsuas-down tam sim no tso cai rau kev nyab xeeb thiab raug ntsuas los ntawm meters thiab tiv thaiv relays, uas tuaj yeem ua haujlwm yam tsis muaj kev sib txuas ncaj qha rau cov kab hluav taws xob siab.
Kev lag luam thoob ntiaj teb rau covTam sim no Transformertau kwv yees tias yuav loj hlob zoo, qhia txog nws qhov tseem ceeb zuj zus hauv kev kho cov phiaj xwm hluav taws xob.
Nco tseg:Qhov kev loj hlob no underscores lub luag hauj lwm tseem ceeb ntawm lubPeb Theem Tam Sim No Transformer. Cov cuab yeej no yog qhov tseem ceeb rau kev ua kom muaj kev ruaj ntseg thiab kev ua haujlwm ntawm lub zog xa hluav taws xob thoob ntiaj teb.
Ntsiab Cai
- APeb theem tam sim no Transformer(CT) ntsuas hluav taws xob hauv peb theem hluav taws xob. Nws hloov cov dej ntws siab mus rau hauv me me, muaj kev nyab xeeb dua rau cov meters thiab cov khoom siv nyab xeeb.
- CTs ua haujlwm nrog cov hlau nplaum. High tam sim no nyob rau hauv lub ntsiab hlau tsim ib tug magnetic teb. Daim teb no ces ua rau me me, muaj kev nyab xeeb tam sim no nyob rau hauv lwm cov hlau rau kev ntsuas.
- CTs yog qhov tseem ceeb rau peb lub laj thawj tseem ceeb: lawv pab kom raug nqi hluav taws xob, tiv thaiv cov cuab yeej los ntawm kev puas tsuaj thaum lub zog hluav taws xob, thiab tso cai rauntse systems los saib xyuas kev siv fais fab.
- Thaum xaiv CT, xav txog nws qhov tseeb rau kev them nqi lossis kev tiv thaiv, phim nws qhov piv txwv tam sim no rau koj qhov system xav tau, thiab xaiv lub cev uas haum rau koj lub installation.
- Tsis txhob cia lub CT lub voj voog thib ob qhib. Qhov no tuaj yeem tsim hluav taws xob siab heev, uas yog qhov txaus ntshai thiab tuaj yeem ua rau cov khoom puas.
Yuav ua li cas peb-theem tam sim no Transformer ua haujlwm
APeb Theem Tam Sim No Transformerua haujlwm ntawm cov hauv paus ntsiab lus ntawm electromagnetism kom ua tiav nws txoj haujlwm. Nws cov qauv tsim yog qhov yooj yim tab sis muaj txiaj ntsig zoo rau kev nyab xeeb saib xyuas cov tshuab hluav taws xob muaj zog. Nkag siab txog nws cov kev ua haujlwm sab hauv qhia tias yog vim li cas nws yog lub hauv paus ntawm kev tswj fais fab.
Cov Ntsiab Cai ntawm Kev Ua Haujlwm
Kev ua haujlwm ntawm lub tshuab hluav taws xob tam sim no yog tswj hwm los ntawm electromagnetic induction, lub hauv paus ntsiab lus piav qhia los ntawmFaraday Txoj Cai. Cov txheej txheem no tso cai rau kev ntsuas tam sim no yam tsis muaj kev sib txuas ntawm hluav taws xob ncaj qha ntawm high-voltage thawj Circuit Court thiab cov ntsuas ntsuas.Tag nrho cov kab ke nthuav tawm hauv ob peb kauj ruam tseem ceeb:
- Ib tug siab thawj tam sim no ntws los ntawm lub ntsiab conductor (tus thawj kauj).
- Qhov tam sim no generates ib tug sib nqus teb nyob rau hauv lub transformer lub hlau core.
- Covmagnetic tub ntxhaiscoj qhov kev hloov pauv magnetic teb mus rau theem nrab coil.
- Lub magnetic teb induces ib tug ntau me me, proportional tam sim no nyob rau hauv lub thib ob kauj.
- Qhov thib ob tam sim no yog tom qab ntawd muaj kev nyab xeeb pub rau meters, relays, lossis tswj cov tshuab ntsuas thiab ntsuas.
Rau peb-theem daim ntawv thov, lub cuab yeej muaj peb txheej coils thiab cores. Qhov kev tsim kho no tso cai rau kev ntsuas ib txhij thiab ywj pheej ntawm kev ntsuas tam sim no hauv txhua ntawm peb theem ntawm cov xov hlau.
Kev tsim kho thiab cov ntsiab lus tseem ceeb
Lub transformer tam sim no muaj peb yam tseem ceeb: thawj winding, theem nrab winding, thiab ib tug sib nqus core.
- Thawj Winding: Qhov no yog tus neeg xyuas pib nqa lub siab tam sim no uas yuav tsum tau ntsuas. Hauv ntau cov qauv tsim (bar-type CTs), thawj qhov tsuas yog lub ntsiab system busbar lossis cable hla ntawm qhov chaw ntawm lub tshuab hloov pauv.
- Secondary Winding: Qhov no muaj ntau qhov kev hloov me me-gauge xaim qhwv ib ncig ntawm cov tub ntxhais sib nqus. Nws ua rau txo qis, ntsuas tam sim no.
- Sib nqus Core: Lub hauv paus tseem ceeb yog ib qho tseem ceeb uas ua kom muaj zog thiab tswj cov magnetic teb los ntawm thawj mus rau theem nrab winding. Cov khoom siv rau cov tub ntxhais ncaj qha cuam tshuam rau lub transformer qhov tseeb thiab efficiency.
Kev xaiv cov khoom tseem ceeb yog qhov tseem ceebkom txo qis zog poob thiab tiv thaiv teeb liab distortion. High-precision transformers siv cov ntaub ntawv tshwj xeeb kom ua tau zoo dua.
| Khoom siv | Cov khoom tseem ceeb | Qhov zoo | Cov ntawv thov siv |
|---|---|---|---|
| Silicon hlau | High magnetic permeability, tsawg core poob | Nqi-zoo, mature manufacturing | Fais fab transformers, tam sim no transformers |
| Amorphous Hlau | Non-crystalline qauv, tsis tshua muaj tub ntxhais poob | Zoo heev zog efficiency, compact loj | High-frequency transformers, precision CTs |
| Nanocrystalline Alloys | Ultra-fine grain qauv, tsis tshua muaj tub ntxhais poob | Superior efficiency, zoo heev high-frequency kev ua tau zoo | High-precision CTs, EMC lim |
| Nickel- Hlau Alloys | High magnetic permeability, tsawg coercive quab yuam | Zoo linearity, zoo rau kev tiv thaiv | High-precision tam sim no transformers, sib nqus sensors |
Nco tseg ntawm qhov tseeb:Nyob rau hauv lub ntiaj teb tiag tiag, tsis muaj transformer zoo meej.Qhov yuam kev tuaj yeem tshwm sim los ntawm ntau yam. Lub excitation tam sim no xav tau los magnetize cov tub ntxhais yuav ua rau theem thiab magnitude deviations. Ib yam li ntawd, kev khiav hauj lwm CT sab nraum nws qhov ntsuas load, tshwj xeeb tshaj yog nyob rau hauv qis heev los yog siab tam sim no, nce kev ntsuas yuam kev. Sib nqus saturation, qhov twg cov tub ntxhais tsis tuaj yeem tuav cov hlau nplaum ntau dua, kuj ua rau muaj qhov tsis raug, tshwj xeeb tshaj yog thaum muaj kev txhaum.
Qhov tseem ceeb ntawm qhov kev hloov pauv
Qhov kev hloov pauv yog lub plawv lej ntawm lub transformer tam sim no. Nws txhais cov kev sib raug zoo ntawm tam sim no nyob rau hauv thawj winding thiab tam sim no nyob rau hauv lub thib ob winding. Qhov piv yog xam los ntawm kev faib cov ntsuas thawj tam sim no los ntawm qhov ntsuas thib ob tam sim no.
Tam sim no Transformer Ratio (CTR) = Thawj Tam Sim No (Ip) / Secondary Tam Sim No (Is)
Qhov piv no yog txiav txim los ntawm tus naj npawb ntawm cov xaim tig hauv txhua lub kauj. Piv txwv li, CT nrog qhov sib piv 400: 5 yuav tsim 5A tam sim no ntawm nws sab thib ob thaum 400A ntws los ntawm thawj tus neeg xyuas pib. Qhov kev kwv yees tau nqis tes ua haujlwm no yog qhov tseem ceeb rau nws lub hom phiaj. Nws hloov qhov txaus ntshai, siab tam sim no mus rau hauv tus qauv, tsis tshua muaj tam sim no uas muaj kev nyab xeeb rau kev ntsuas cov cuab yeej siv. Xaiv qhov kev hloov pauv kom raug raws li qhov kev xav tau ntawm lub cev yog qhov tseem ceeb rau kev ua kom muaj tseeb thiab kev nyab xeeb.
Peb-Phase vs. Ib-theem Tam Sim No Transformers
Xaiv txoj cai tam sim no transformer configuration yog qhov tseem ceeb rau qhov tseeb thiab txhim khu kev qha fais fab system xyuas. Qhov kev txiav txim siab ntawm kev siv ib qho Peb Theem Tam Sim No Transformer unit lossis peb cais ib-theem CTs nyob ntawm qhov system tsim, daim ntawv thov lub hom phiaj, thiab kev txwv lub cev.
Cov qauv tseem ceeb thiab kev tsim qauv sib txawv
Qhov sib txawv tshaj plaws nyob rau hauv lawv lub cev kev tsim kho thiab yuav ua li cas lawv cuam tshuam nrog cov neeg xyuas pib. Aib-theem CTyog tsim los puag ncig ib qho hluav taws xob conductor. Hauv qhov sib piv, peb-theem CT tuaj yeem yog ib qho, sib koom ua ke uas tag nrho peb theem cov neeg ua haujlwm dhau los, lossis nws tuaj yeem xa mus rau cov txheej txheem ntawm peb theem ib zaug CTs. Txhua txoj hauv kev ua haujlwm rau lub hom phiaj sib txawv hauv kev saib xyuas lub zog.
| Feature | Peb cais Ib-theem CTs | Ib leeg-theem CT Unit |
|---|---|---|
| Kev Npaj Lub Cev | Ib qho CT yog ntsia rau ntawm txhua theem tus neeg xyuas pib. | Tag nrho peb theem conductors dhau los ntawm ib lub qhov rais CT. |
| Lub Hom Phiaj | Muab cov ntaub ntawv raug, theem los ntawm theem tam sim no. | Txheeb xyuas qhov tsis sib xws tam sim no, feem ntau rau qhov ua txhaum hauv av. |
| Hom Siv Case | Metering thiab saib xyuas cov khoom sib npaug lossis tsis sib npaug. | Av txhaum kev tiv thaiv systems (zero sequence). |
Application-Specific Advantages
Txhua qhov kev teeb tsa muaj cov txiaj ntsig tshwj xeeb raws li cov kev xav tau tshwj xeeb. Siv peb cais ib-theem CTs muab cov ncauj lus kom ntxaws thiab pom tseeb ntawm lub kaw lus. Txoj kev no tso cai rau kev ntsuas qhov tseeb ntawm txhua theem, uas yog qhov tseem ceeb rau:
- Revenue-Qib Billing: Kev soj ntsuam xyuas qhov tseeb yuav tsum muaj CT rau txhua theem kom muaj kev ncaj ncees thiab meej txog kev them nqi hluav taws xob.
- Imbalanced Load Analysis: Cov kab ke nrog ntau lub sijhawm thauj khoom (xws li lub tsev lag luam) feem ntau muaj qhov tsis sib xws ntawm txhua theem. Cais CTs ntes qhov tsis txaus ntseeg no kom raug.
Ib chav tsev ib zaug peb-theem CT, feem ntau siv rau kev ntsuas qhov seem lossis xoom-ib ntus, ua kom pom qhov tsis raug hauv av los ntawm kev hnov qhov sib txawv ntawm qhov tam sim no hla peb theem.
Thaum twg los xaiv ib qho dhau lwm qhov
Qhov kev xaiv nyob ntawm qhov hnyav ntawm qhov hluav taws xob qhov hluav taws xob thiab lub hom phiaj saib xyuas.
Rau cov ntawv thov xav tau qhov tseeb siab tshaj plaws, xws li cov nyiaj tau los-qib ntsuas lossis kev saib xyuas cov tshuab uas muaj peev xwm tsis txaus siab xws li hnub ci inverters, sivpeb CTsyog tus qauv. Txoj hauv kev no tshem tawm kev kwv yees thiab tiv thaiv kev nyeem ntawv tsis raug uas tuaj yeem tshwm sim thaum tsis siv hluav taws xob lossis ua kom sib npaug ntawm txhua theem.
Nov yog qee cov lus qhia dav dav:
- Peb-theem, 4-Wire Wye Systems: Cov tshuab no, uas suav nrog cov xaim nruab nrab, xav tau peb CTs kom tiav qhov tseeb.
- Peb-theem, 3-Wire Delta Systems: Cov tshuab no tsis muaj cov xaim nruab nrab. Ob CTs feem ntau txaus rau kev ntsuas, raws li tau hais los ntawmBlondel's Theorem.
- Balanced vs. Unbalanced Loads: Thaum ib qho CT kev nyeem ntawv tuaj yeem sib npaug ntawm qhov sib npaug zoo kawg nkaus, txoj kev no qhia txog kev ua yuam kev yog tias lub load tsis sib npaug. Rau cov khoom siv xws li HVAC units, tshuab ziab khaub ncaws, lossis subpanels, ib txwm siv CT ntawm txhua tus neeg xyuas pib muaj zog.
Thaum kawg, txiav txim siab txog hom kab ke thiab qhov yuav tsum tau ua kom raug yuav ua rau muaj qhov tseeb CT teeb tsa.
Thaum twg yog peb-theem tam sim no Transformer siv?
APeb Theem Tam Sim No Transformeryog lub hauv paus tseem ceeb hauv cov tshuab hluav taws xob niaj hnub no. Nws daim ntawv thov txuas mus deb tshaj qhov yooj yim ntsuas. Cov cuab yeej no yog qhov tseem ceeb rau kev ua kom muaj txiaj ntsig nyiaj txiag, tiv thaiv cov cuab yeej kim, thiab ua kom muaj kev tswj xyuas lub zog ntse thoob plaws hauv kev lag luam, kev lag luam, thiab kev siv hluav taws xob.
Rau qhov tseeb zog ntsuas thiab nqi
Cov neeg saib xyuas kev siv hluav taws xob thiab chaw ua haujlwm cia siab rau kev ntsuas lub zog kom meej rau kev them nqi. Hauv cov chaw lag luam loj thiab kev lag luam, qhov chaw siv hluav taws xob ntau heev, txawm tias qhov tsis raug me me tuaj yeem ua rau muaj kev cuam tshuam nyiaj txiag loj.Tam sim no transformersmuab qhov tsim nyog precision rau txoj haujlwm tseem ceeb no. Lawv ntsuas cov dej ntws siab mus rau qib uas cov nyiaj tau los-qib ntsuas tuaj yeem sau tau zoo thiab raug.
Qhov tseeb ntawm cov transformers no tsis yog arbitrary. Nws yog tswj hwm los ntawm cov txheej txheem thoob ntiaj teb nruj uas ua kom muaj kev ncaj ncees thiab sib xws hauv kev ntsuas hluav taws xob. Cov qauv tseem ceeb suav nrog:
- ANSI/IEEE C57.13: Tus qauv siv dav hauv Tebchaws Meskas rau ob qho tib si ntsuas thiab tiv thaiv tam sim no transformers.
- ANSI C12.1-2024: Qhov no yog thawj txoj cai rau kev ntsuas hluav taws xob hauv Teb Chaws Asmeskas, txhais cov kev cai raug rau cov ntsuas.
- Cov chav kawm IEC: Cov qauv thoob ntiaj teb zoo li IEC 61869 txhais cov chav kawm raug xws li 0.1, 0.2, thiab 0.5 rau kev them nqi. Cov chav kawm no qhia txog qhov ua yuam kev siab tshaj plaws.
Nco tseg ntawm Lub Hwj Chim Zoo:Tshaj li qhov loj tshaj tam sim no, cov qauv no kuj hais txog qhov yuam kev ntawm lub kaum sab xis. Kev ntsuas theem raug yog qhov tseem ceeb rau kev suav cov hluav taws xob reactive thiab lub zog hluav taws xob, uas yog qhov tseem ceeb ntawm cov khoom siv hluav taws xob niaj hnub no.
Rau Overcurrent thiab Fault Protection
Tiv thaiv cov tshuab hluav taws xob los ntawm kev puas tsuaj yog ib qho tseem ceeb tshaj plaws ntawm kev hloov pauv tam sim no. Hluav taws xob faults, xws li luv luv Circuit Court lossis hauv av txhaum, tuaj yeem tsim cov dej ntws loj heev uas rhuav tshem cov cuab yeej thiab tsim kev nyab xeeb loj. Ib qho kev tiv thaiv overcurrent ua haujlwm ua ke los tiv thaiv qhov no.
Lub system muaj peb qhov tseem ceeb:
- Tam sim no Transformers (CTs): Cov no yog cov sensors. Lawv niaj hnub saib xyuas cov dej ntws tam sim no rau cov cuab yeej tiv thaiv.
- Tiv thaiv Relays: Qhov no yog lub hlwb. Nws tau txais cov teeb liab los ntawm CTs thiab txiav txim siab yog tias qhov tam sim no txaus ntshai heev.
- Circuit Breakers: Qhov no yog cov leeg. Nws tau txais cov lus txib mus txawv tebchaws los ntawm lub relay thiab lub cev disconnects Circuit Court kom nres qhov txhaum.
CTs tau koom ua ke nrog ntau hom relays txhawm rau txheeb xyuas cov teeb meem tshwj xeeb. Piv txwv li, ibOvercurrent Relay (OCR)mus ncig ua si thaum tam sim no tshaj qhov kev nyab xeeb, tiv thaiv cov khoom siv los ntawm overloads. IbNtiaj teb Fault Relay (EFR)kuaj pom tam sim no ntws mus rau hauv av los ntawm kev ntsuas qhov tsis sib xws ntawm cov theem tam sim no. Yog tias CT saturates thaum muaj kev ua txhaum, nws tuaj yeem cuam tshuam cov teeb liab xa mus rau relay, uas ua rau lub cev tiv thaiv tsis ua haujlwm. Yog li ntawd, kev tiv thaiv-chav kawm CTs yog tsim los kom nyob twj ywm muaj tseeb txawm nyob rau hauv cov xwm txheej phem heev.
Rau Intelligent Load Monitoring thiab Management
Cov kev lag luam niaj hnub no tab tom mus dhau kev tiv thaiv yooj yim thiab kev them nqi. Tam sim no lawv siv cov ntaub ntawv hluav taws xob rau kev ua haujlwm siab tshaj plaws thiabkwv yees txij nkawm. Tam sim no transformers yog cov ntaub ntawv tseem ceeb rau cov tshuab ntse no. Los ntawm clampingCTs uas tsis muaj kev cuam tshuammus rau lub cev muaj zog cov kab hluav taws xob, engineers tuaj yeem tau txais cov ncauj lus kom ntxaws hluav taws xob yam tsis muaj kev cuam tshuam kev ua haujlwm.
Cov ntaub ntawv no ua rau muaj kev kwv yees kev saib xyuas muaj zog:
- Kev txais cov ntaub ntawv: CTs ntes cov kab raw cov ntaub ntawv tam sim no los ntawm cov tshuab ua haujlwm.
- Kev teeb tsa: Tshwj xeeb algorithms ua cov teeb liab hluav taws xob los rho tawm cov yam ntxwv uas qhia lub tshuab kev noj qab haus huv.
- Kev Ntsuas Ntse: Los ntawm kev txheeb xyuas cov hluav taws xob kos npe nyob rau lub sijhawm, cov tshuab tuaj yeem tsim "digital ntxaib" ntawm lub cev muaj zog. Cov qauv digital no pab kwv yees tsim teeb meem ua ntej lawv ua rau tsis ua haujlwm.
Qhov kev ntsuam xyuas ntawm CT cov ntaub ntawv no tuaj yeem txheeb xyuas ntau yam teeb meem ntawm kev siv tshuab thiab hluav taws xob, suav nrog:
- Bearing faults
- Cov kab rotor tawg
- Huab cua-gap eccentricity
- Mechanical misalignments
Txoj hauv kev zoo no tso cai rau cov pab pawg saib xyuas kom teem sijhawm kho, txiav txim qhov chaw, thiab zam kom tsis txhob poob nyiaj poob haujlwm, hloov pauv tam sim no los ntawm cov cuab yeej ntsuas yooj yim mus rau qhov tseem ceeb ntawm kev pib ua haujlwm ntse.
Yuav Ua Li Cas Xaiv Txoj Cai Peb-theem CT
Xaiv qhov raug Peb Theem Tam Sim No Transformer yog qhov tseem ceeb rau kev ntseeg siab thiab raug. Cov kws kho tsheb yuav tsum xav txog cov kev xav tau tshwj xeeb ntawm daim ntawv thov, suav nrog cov kev xav tau raug, kev thauj khoom, thiab kev txwv lub cev. Kev ua tib zoo xaiv cov txheej txheem ua kom pom kev ua tau zoo rau kev ntsuas, kev tiv thaiv, thiab kev saib xyuas.
Nkag siab cov chav kawm raug
Tam sim no transformers yog categorized rau hauv cov chav kawm raugrau metering los yog kev tiv thaiv. Txhua chav kawm ua haujlwm rau lub hom phiaj sib txawv, thiab siv qhov tsis ncaj ncees lawm tuaj yeem ua rau poob nyiaj txiag lossis khoom siv puas tsuaj.
- Kev ntsuas CTsmuab siab precision rau kev them nqi thiab kev tsom xam raws li kev khiav hauj lwm tam sim no.
- Kev tiv thaiv CTsyog tsim los tiv thaiv siab txhaum tam sim no, kom ntseeg tau tias kev tiv thaiv relays khiav lag luam ntseeg tau.
Ib qho yuam kev feem ntau yog siv lub ntsuas ntsuas siab CT rau kev tiv thaiv. Cov CTs no tuaj yeem saturate thaum lub sijhawm ua txhaum, uas tiv thaiv cov relay los ntawm kev txais cov teeb liab raug thiab ua rau lub voj voog tawg hauv lub sijhawm.
| Feature | Kev ntsuas CTs | Kev tiv thaiv CTs |
|---|---|---|
| Lub hom phiaj | Kev ntsuas raug rau kev them nqi thiab kev saib xyuas | Ua haujlwm tiv thaiv relay thaum muaj teeb meem |
| Tej Chav Kawm | 0.1, 0.2S, 0.5S | 5P10, 5P20, 10P10 |
| Cov yam ntxwv tseem ceeb | Precision nyob rau hauv ib txwm loads | Ciaj sia nyob thiab ruaj ntseg thaum ua txhaum |
Nco tseg ntawm Over-Specification:Specification ibtsis tsim nyog cov chav kawm raug siab lossis muaj peev xwmtuaj yeem nce tus nqi thiab qhov loj. Ib qho loj CT tej zaum yuav nyuaj rau kev tsim khoom thiab yuav luag tsis yooj yim sua kom haum rau hauv cov qauv hloov pauv, ua rau nws xaiv tsis tau.
Sib piv CT Ratio rau System Load
Qhov sib piv CT yuav tsum ua raws li cov khoom siv hluav taws xob xav tau. Qhov loj me me kom ntseeg tau tias CT ua haujlwm hauv nws qhov tseeb tshaj plaws. Ib txoj hauv kev yooj yim pab txiav txim qhov tseeb piv rau lub cev muaj zog:
- Nrhiav lub cev muaj zog puv load amperes (FLA) los ntawm nws daim ntawv teev npe.
- Ntxiv FLA los ntawm 1.25 kom suav rau cov xwm txheej dhau.
- Xaiv qhov ze tshaj tus qauv CT piv rau qhov ntsuas tus nqi no.
Piv txwv li, lub cev muaj zog nrog FLA ntawm 330A yuav xav tau kev suav ntawm330A * 1.25 = 412.5A. Qhov sib piv tus qauv ze tshaj plaws yuav yog 400: 5.Xaiv qhov piv txwv uas siab dhau yuav txo qhov raug ntawm cov khoom qis.Ib qho piv txwv uas qis dhau tuaj yeem ua rau CT saturate thaum ua txhaum, compromising kev tiv thaiv systems.
Xaiv qhov tsim nyog lub cev muaj nuj nqi
Daim ntawv lub cev ntawm peb-theem tam sim no transformer nyob ntawm qhov chaw teeb tsa. Ob hom tseem ceeb yog solid-core thiab split-core.
- Solid-core CTsmuaj lub voj kaw. Installers yuav tsum disconnect tus thawj conductor rau xov nws los ntawm lub core. Qhov no ua rau lawv zoo tagnrho rau kev tsim kho tshiab uas lub hwj chim tuaj yeem raug kaw.
- Split-core CTstuaj yeem qhib thiab clamped ib ncig ntawm tus neeg xyuas pib. Qhov kev tsim no yog zoo meej rau retrofitting systems uas twb muaj lawm vim nws tsis xav tau lub hwj chim kaw.
| Scenario | Hom CT zoo tshaj plaws | Yog vim li cas |
|---|---|---|
| Kev tsim kho tsev kho mob tshiab | Solid-core | Yuav tsum muaj qhov raug siab, thiab cov xov hlau tuaj yeem raug txiav tawm kom zoo. |
| Office tsev retrofit | Split-core | Kev teeb tsa tsis muaj kev cuam tshuam thiab tsis tas yuav muaj hluav taws xob tua. |
Kev xaiv ntawm cov hom no nyob ntawm seb qhov kev teeb tsa yog qhov tshiab lossis rov ua dua tshiab thiab yog tias cuam tshuam lub zog yog qhov kev xaiv.
Peb-theem tam sim no transformer yog ib qho khoom siv tseem ceeb rau kev ntsuas kev nyab xeeb hauv peb-theem systems. Nws cov ntawv thov tseem ceeb kom paub meej txog kev them nqi hluav taws xob, tiv thaiv cov cuab yeej los ntawm kev txheeb xyuas qhov tsis raug, thiab ua kom muaj kev tswj hwm lub zog ntse. Kev xaiv kom raug raws li qhov tseeb, qhov sib piv, thiab daim ntawv tseem ceeb yog qhov tseem ceeb rau kev ua haujlwm ruaj khov thiab nyab xeeb.
Saib tom ntej: Niaj hnub CTs nrogntse tshuabthiabmodular tsimua kom lub zog siv tau zoo dua. Txawm li cas los xij, lawv cov txiaj ntsig ib txwm nyob ntawm kev xaiv kom raug thiabkev nyab xeeb kev coj ua.
FAQ
Yuav ua li cas yog tias ib qho CT thib ob yog qhib?
Ib qho qhib hluav taws xob thib ob ua rau muaj kev phom sij loj. Nws induces ib tug tsis tshua muaj voltage nyob rau hauv lub thib ob terminals. Qhov hluav taws xob no tuaj yeem ua rau lub tshuab hluav taws xob puas tsuaj thiab ua rau muaj kev pheej hmoo loj rau cov neeg ua haujlwm. Nco ntsoov xyuas kom lub voj voog thib ob luv luv lossis txuas nrog lub nra.
Ib qho CT puas tuaj yeem siv rau kev ntsuas thiab kev tiv thaiv?
Nws tsis pom zoo. Kev ntsuas CTs xav tau qhov tseeb siab ntawm cov khoom ib txwm muaj, thaum kev tiv thaiv CTs yuav tsum ua kom ntseeg tau thaum muaj kev ua txhaum loj. Kev siv ib qho CT rau ob lub hom phiaj cuam tshuam txog kev them nqi raug lossis khoom siv kev nyab xeeb, vim tias lawv cov qauv tsim ua haujlwm sib txawv.
CT saturation yog dab tsi?
Saturation tshwm sim thaum CT's core tsis tuaj yeem tuav lub zog sib nqus ntau dua, feem ntau thaum muaj kev txhaum loj. Tom qab ntawd lub transformer tsis ua kom muaj qhov sib npaug thib ob tam sim no. Qhov no ua rau kev ntsuas tsis raug thiab tuaj yeem tiv thaiv kev tiv thaiv relay los ntawm kev ua haujlwm kom raug thaum muaj xwm txheej tseem ceeb.
Vim li cas cov hluav taws xob thib ob yog tus qauv rau 1A lossis 5A?
Standardizing theem nrab tam sim no ntawm 1A lossis 5A ua kom muaj kev sib cuam tshuam. Nws tso cai rau meters thiab relays los ntawm txawv manufacturers ua hauj lwm ua ke seamlessly. Qhov kev xyaum no ua kom yooj yim rau kev tsim qauv, hloov cov khoom siv, thiab txhawb kev sib raug zoo thoob plaws hauv kev lag luam hluav taws xob.
Post lub sij hawm: Nov-07-2025