Kusarudza iyo chaiyo Split Core Current Transformer yakakosha kune akabudirira retrofit mapurojekiti. Kuwedzera kukoshesa kwesimba resimba kunofambisa kudiwa kwemhinduro dzepamusoro dzekutarisa. Nyanzvi inotanga kuyera dhayamita rekunze kondakita. Ivo zvakare vanosarudza iyo yakanyanya amperage iyo conductor ichatakura. Tevere, izvi zvinodiwa zvenyama nemagetsi zvinofananidzwa neaSplit Core Yazvino Sensornemadimikira akakodzera. Izvi zvinosanganisira saizi yehwindo chaiyo, chiyero chazvino, kirasi yechokwadi, uye chiratidzo chekubuda. VakasarudzwaSplit Core Current Transducerinofanira kuenderana nemamita emagetsi aripo.
Iyo split-core dhizaini inobvumira kuisirwa nyore kutenderedza makondakita aripo. Izvi zvinoitayakanakira retrofitting masisitimu pasina kukanganisa kuyerera kwazvino.
Key Takeaways
- Eresa saizi yekondakita uye iyo yakanyanya ikozvino. Izvi zvinoita kuti CT ikwane uye inobata mutoro wemagetsi zvakachengeteka.
- Matanidza iyo CT inobuda chiratidzo kune yako magetsi mita. Izvi zvinodzivirira data isiriyo kana kukuvara kumidziyo yako.
- Sarudza kirasi yakarurama yezvido zvako. Kubhadhara kunoda kurongeka kwepamusoro, nepo kutarisa kuchigona kushandisa kuderera kwechokwadi.
- Tarisa zvitupa zvekuchengetedza seUL kana CE mamaki. Izvi zvinosimbisa kuti CT inosangana nemitemo yekuchengetedza.
- Funga nezvenzvimbo yekuisa. Izvi zvinosanganisira tembiricha, mwando, uye zvinhu zvinoparadza zvekushandisa kwenguva refu.
Kukura iyo CT: Conductor Diameter uye Amperage Rating
Kunyatsoyera saizi atransformer yazvino(CT) inosanganisira matanho maviri akakosha. Kutanga, nyanzvi inofanirwa kusimbisa zviyero zvemuviri. Chechipiri, ivo vanofanirwa kuongorora zviyero zvemagetsi. Aya matanho ekutanga anovimbisa kuti mudziyo wakasarudzwa unoenderana nemazvo uye unoshanda nemazvo.
Kuyera Conductor Diameter ye Window size
Danho rekutanga pakusarudza aSplit Core Current Transformerchiyero chemuviri. Nyanzvi inofanirwa kuona kuti pakavhurwa mudziyo, kana kuti “hwindo,” rakakura zvekuti rinovhara kondakita. Kuyera kwakaringana kwedhayamita yekunze kwekondakita, kusanganisira kuvharwa kwayo, kwakakosha.
Vanamazvikokota vanoshandisa maturusi akati wandei pabasa iri. Kusarudzwa kwechishandiso kunowanzoenderana nebhajeti uye kudiwa kwekusina-conductive kuchengetedzwa.
- Plastic calipersipa inodhura-inoshanda uye yakachengeteka, isiri-conductive sarudzo yenzvimbo dzinogara.
- Digital micrometerskupa zviyero zvepamusoro-soro.
- Zvishandiso zvehunyanzvi zvakaita seBurndy Wire Mikezvakagadzirirwa zvakanangana nechirongwa ichi.
- Go/no-go magaugesinogona zvakare kuona nekukurumidza kana conductor inokodzera saizi yakafanorongwa.
Conductor saizi muNorth America kazhinji anoteveraAmerican Wire Gauge (AWG) system. Iyi chiyero, inotsanangurwa muASTM B 258, inotsanangura dhayamita yewaya dzemagetsi. Nhamba diki yeAWG inoratidza yakakura waya dhayamita. Iyo inotevera chati uye tafura inoratidza hukama pakati peAWG saizi uye dhayamita.
| AWG | Diameter (mu) | Dhayamita (mm) |
|---|---|---|
| 4/0 | 0.4600 | 11.684 |
| 2/0 | 0.3648 | 9.266 |
| 1/0 | 0.3249 | 8.252 |
| 2 | 0.2576 | 6.543 |
| 4 | 0.2043 | 5.189 |
| 6 | 0.1620 | 4.115 |
| 8 | 0.1285 | 3.264 |
| 10 | 0.1019 | 2.588 |
| 12 | 0.0808 | 2.053 |
| 14 | 0.0641 | 1.628 |
Kuiswa nemaconductor akawanda akaunganidzwa pamwechete kunoda kutariswa kwakanyanya. Iwindo reCT rinofanirwa kunge rakakura zvakakwana kuti ritenderere bundle rese. Thedenderedzwa rakabatanidzwa rewaya dzakasungwa rinoraira hushoma hunodiwa saizi yehwindo.
Pro Tip:Iwindo reCT rinofanira kukwanazvakanakisa kutenderedza tambo kana busbar. Iyo snug fit inogona kuita kuti kuisirwa kunetse, nepo aperture yakawandisa yakawandisa inogona kuunza zvikanganiso zvekuyera. Chinangwa ndechekugadzikana pasina nzvimbo yakakosha isina chinhu.
Kusarudza iyo Maximum Current Rating
Mushure mekusimbisa kukwana kwemuviri, nhanho inotevera ndeyekusarudza iyo chaiyo amperage rating. The CT's primary current rating inofanira kunge yakakura kudarika iyo inotarisirwa ikozvino yedunhu rinotariswa. Chiyero ichi hachisi cherwendo rwemutsigiri wedunhu asi iyo yakanyanya kusimudzira amperage iyo mutoro unodhonza.
Mudzidzisi anofanira kuzvidavirira pamusoro pezvingangoitika mune ramangwana kuwedzera mukutakura kwemagetsi. Iyi tsika inodzivirira kudiwa kwekutsiva kunodhura gare gare.
Indasitiri yakajairika tsika yakanakisa ndeyekusarudza CT ine yekutanga chiyero icho chiri125%yehuwandu hunoenderera mberi mutoro. Iyi 25% buffer inopa muganho wekuchengetedza wekuwedzera mune ramangwana uye inodzivirira iyo CT kubva mukuzara.
Semuyenzaniso, kana dunhu rakakura rinoramba richiremerwa riri 80A, nyanzvi inoverenga hudiki hweCT rating se.80A * 1.25 = 100A. Muchiitiko ichi, 100A Split Core Current Transformer ingave sarudzo yakakodzera. Kudzikisa pasi CT kunogona kutungamirira kune core saturation, zvichikonzera kuverenga kusina kururama uye kukanganisa kunogona kuitika. Sezvineiwo, kuwandisa kwakakosha kunogona kuderedza kurongeka pamatanho akaderera azvino, saka kuwana chiyero chakakodzera ndicho chinhu chakakosha.
Kufananidza Chiratidzo chekubuda kune Meter Yako
Kamwe tekinoroji achinge asimbisa saizi yemuviri, rinotevera rinokosha basa nderekuona kuenderana kwemagetsi. A Split Core Current Transformer inoita se sensor, ichishandura yakakwira yekutanga ikozvino kuita yakaderera-level chiratidzo. Ichi chiratidzo chinobuda chinofanira kunyatsoenderana neiyo mita yemagetsi kana yekutarisa mudziyo wakagadzirirwa kugamuchira. Mutambo usina kunaka unotungamira kune data rakashata kana, mune dzimwe nguva, kukuvadzwa kwemidziyo.
Kunzwisisa Zvakajairwa CT Outputs (5A, 1A, 333mV)
Ikozvino ma transformer anowanikwa aine akati wandei akajairwa masaini masaini. Mhando nhatu dzinonyanya kuwanikwa mumashandisirwo ekudzorera i5 Amp (5A), 1 Amp (1A), uye 333 millivolt (333mV). Chimwe nechimwe chine maitiro akasiyana uye chinokodzera mamiriro akasiyana.
5A uye 1A Zvinobuda:Izvi ndizvo zvechinyakare zvinobuda. Iyo CT inogadzira yechipiri ikozvino yakanyatsoenderana neyekutanga ikozvino. Semuenzaniso, 100: 5A CT inoburitsa 5A pane yechipiri apo 100A inoyerera kuburikidza neyekutanga conductor. Nepo 5A yanga iri chiyero chenhoroondo, 1A zvabuda zviri kuwana mukurumbira kune kuisirwa kutsva.
⚠️ Yambiro Yakakosha Yekuchengetedza:A CT ine 5A kana 1A yakabuda ndiyo ikozvino. Dunhu rayo rechipiri rinofaniraneverkusiiwa yakavhurika apo conductor yekutanga iine simba. Yechipiri yakavhurika inogona kugadzirayakakwirira zvakanyanya, ine njodzi(kazhinjizviuru zvevolts), zvichiunza njodzi yekuvhunduka. Ichi chiitiko chinogonawo kukonzera kuti CT's core iwedzere uye kutadza, zvinogona kuparadza iyo CT uye kukuvadza yakabatana michina. Gara uine chokwadi chekuti materminals akapfupikiswa kana akabatana nemamita usati wasimbisa dunhu rekutanga.
Thesarudzo pakati pe1A uye 5A yakabudakazhinji zvinoenderana nechinhambwe kumamita uye maratidziro eprojekiti.
| Feature | 1A Sekondari CT | 5A Sekondari CT |
|---|---|---|
| Kupera Simba | Kuderera kwesimba rezasi (I²R) mumawaya ekutungamirira. | Kurasikirwa kwesimba kwepamusoro muwaya dzemutobvu. |
| Lead Length | Zvirinani kumadaro marefu nekuda kwekuderera kwevoltage kudonha uye mutoro. | Zvishoma kune zvinhambwe zvipfupi kuchengetedza chokwadi. |
| Wire Size | Inobvumira tambo diki, dzisingadhure. | Inoda mawaya makuru, anodhura ekutungamirira kwenguva refu. |
| Safety | Lower induced voltage kana yechipiri yakavhurwa netsaona. | Yakakwira induced voltage uye njodzi huru kana yakavhurwa. |
| Mutengo | Kazhinji inodhura zvakanyanya nekuda kwemamwe mamhepo echipiri. | Kazhinji inodhura zvishoma. |
| Kugarisana | Kukura mwero, asi kungangoda mamita matsva. | Chiyero chetsika nekuenderana kwakafara. |
333mV Kubuda:Iyi mhando yeCT inoburitsa yakaderera-level voltage chiratidzo. Aya maCTs akachengetedzeka nekuti ane akavakirwa-mukati-mutoro resistor inoshandura yechipiri ikozvino kune voltage. Iyi dhizaini inodzivirira iyo yakakwira-voltage njodzi yakabatana neyakavhurika-inotenderera 1A kana 5A CT. Chiratidzo che333mV chiyero chakajairwa kumamita emagetsi emagetsi emazuva ano.
Imwe sensor mhando, iyoRogowski Coil, zvakare inogadzira millivolt-level kubuda. Nekudaro, zvinoda musanganiswa wakasiyana kuti ushande nemazvo. Rogowski coils inochinjika uye yakanakira kuyera yakakwira mafungu kana mumashandisirwo ane yakakura frequency renji, asi kazhinji haana kukodzera kutakurwa.pasi pe20A.
Kuongorora Zvinodiwa zveMeter Yako
Mutemo wakanyanya kukosha wekusarudzwa kweCT ndewekuti kubuda kweCT kunofanirwa kuenderana nekuisa mita. Meta yakagadzirirwa kupinza 333mV haigone kuverenga chiratidzo che5A, uye zvakasiyana. Iyi yekusimbisa maitiro inosanganisira kutarisa madheti uye kunzwisisa pfungwa yemutoro.
Chekutanga, nyanzvi inofanirwa kuona mhando yekupinza inotsanangurwa nemugadziri wemamita. Ruzivo urwu runowanzo kudhindwa pane iyo kifaa label kana kutsanangurwa mune yayo yekuisa bhuku. Iko kupinza kuchataurwa zvakajeka se 5A, 1A, 333mV, kana humwe kukosha chaiko.
Chechipiri, nyanzvi inofanirwa kufunga nezvesemutoropa CT. Kuremerwa ndiwo mutoro wakakwana wakabatana neyechipiri yeCT, yakayerwa muVolt-Amps (VA) kana Ohms (Ω). Uyu mutoro unosanganisira:
- Iyo yemukati impedance yemamita pachayo.
- Kupokana kwewaya dzekutungamira dzinomhanya kubva kuCT kuenda kumita.
- Iyo impedance yeimwe mimwe michina yakabatana.
Yese CT ine ayepamusoro mutoro rating(semuenzaniso, 1VA, 2.5VA, 5VA). Kupfuura chiyero ichi kuchaita kuti CT irasikirwe nemazvo. Sezvinoratidzwa netafura iri pasi apa, iyokupinza impedance yemamita kunosiyanazvakanyanya nemhando, inova chikamu chikuru chemutoro wose.
| Meter Input Type | Typical Input Impedance |
|---|---|
| 5A Input | <0.1 Ω |
| 333mV Input | > 800 kΩ |
| Rogowski Coil Input | > 600 kΩ |
Iyo yakaderera impedance yemamita 5A yakagadzirirwa kuve pedyo-ipfupi dunhu, nepo iyo yakakwira impedance yemamita 333mV yakagadzirirwa kuyera voltage pasina kudhirowa yakakosha ikozvino.
Pro Tip:Gara uchitarisa zvinyorwa zvemugadziri zveese CT nemamita. Vazhinji vagadziri vanopakugarisana matafuraiyo inonyatso nyora kuti ndedzipi mhando dzeCT dzakatenderwa kushandiswa nemamita chaiwo kana inverters. Kuyambuka magwaro aya ndiyo nzira yechokwadi yekuvimbisa kuisirwa kwakabudirira.
Semuyenzaniso, inogadzira inverter inogona kupa chati inoratidza kuti "Model X" hybrid inverter inongoenderana chete ne "Eastron SDM120CTM" mita uye CT yakabatana nayo. Kuedza kushandisa imwe CT yakasiyana, kunyangwe iine chaiyo yekubuda chiratidzo, inogona kubvisa waranti kana kutungamira kune kusashanda zvakanaka kwehurongwa.
Kusarudza iyo Yakarurama Yechokwadi Kirasi Yekushandisa Kwako
Mushure mekuyera iyo CT uye nekufananidza kuburitsa kwayo, tekinoroji inofanirwa kusarudza iyo yakakodzera kirasi yechokwadi. Chiyero ichi chinotsanangura kuti padhuze sei iyo CT yechipiri yekubuda inomiririra chaiyo yekutanga ikozvino. Kusarudza kirasi chaiyo inova nechokwadi chekuti data rakaunganidzwa rakavimbika zvakakwana kune chinangwa chayo, kungave kuri kubhadharisa kwakakosha kana kutarisisa. Sarudzo isina kufanira inogona kutungamira kune kusawirirana kwemari kana kusarudzika kwekuita sarudzo.
Kutsanangura Makirasi eCT Akarurama
International mwero, akadaiIEC 61869-2, tsanangura makirasi echokwadi eCT. Iyi chiyero inotsanangura kukanganisa kunotenderwa pazvikamu zvakasiyana zveCT yakayerwa ikozvino. Musiyano wakakosha uripo pakati pemakirasi akajairwa uye akakosha, akaomesesa makirasi.
- Iyo IEC 61869-2 yakajairwa inotsanangura mashandiro ekuita kune ese ari maviri chiyero chikanganiso uye chikamu chekutamiswa.
- Special 'S' class CTs (semuenzaniso, Kirasi 0.5S) ine miganho yezvikanganiso zvakanyanya pamazinga akaderera azvino zvichienzaniswa neawo akajairwa (semuenzaniso, Kirasi 0.5).
- Semuenzaniso, pa5% yeiyo yakayerwa ikozvino, Kirasi 0.5 CT inogona kuva ne1.5% kukanganisa, nepo Kirasi 0.5S CT inofanirwa kunge iri mukati me0.75%.
Kururama kunobatanidza zvinopfuura ukuru hwazvino. Zvinosanganisirawophase displacement, kana kukanganisa kwechikamu. Iyi ndiyo nguva yekunonoka pakati peiyo yekutanga waveform uye yechipiri kubuda waveform. Kunyangwe chikanganiso chechikamu chidiki chinogona kukanganisa maverengero emagetsi.
Nguva Yekusarudza Billing-Giredhi vs. Monitoring-Giredhi Kururama
Chikumbiro chinoraira chokwadi chinodiwa. CTs kazhinji inowira muzvikamu zviviri: kubhadharisa-giredhi uye yekutarisa-giredhi.
Billing-giredhiCTs (semuenzaniso, Kirasi 0.5, 0.5S, 0.2) yakakosha pakushandisa mari. Kana kambani inoshanda kana muridzi wemba achikwereta muroja wekushandisa simba, kuyerwa kunofanirwa kuve kwakanyatso. Adiki kukanganisa kwechikamu kunogona kukonzera kusakosha kwakakosha mukuyerwa kwesimba rinoshanda, kunyanya muzvirongwa zvine simba rakaderera. Izvi zvinoshandura zvakananga kumhosva dzemari dzisina kururama.
Zviyero zvisina kujeka zvesimba kubva mukukanganisa kwechikamu zvinogona kukonzera matambudziko kupfuura kubhadharisa. Mune matatu-chikamu masisitimu, inogona kutungamirira kunemitoro isina kuenzana uye kushushikana kwemidziyo. Inogona kutokonzera kuti relay dzekudzivirira dzishaye basa, kugadzira njodzi dzekuchengetedza.
Monitoring-giredhiCTs (semuenzaniso, Kirasi 1.0 uye pamusoro) yakakodzera kune general simba manejimendi. Vanamazvikokota vanovashandisa kutevedzera mashandiro emidziyo, kuona mapatani ekutakura, kana kugovera mari mukati. Kune aya mabasa, dhigirii yakaderera zvishoma yekurongeka inogamuchirwa. Kusarudza iyo chaiyo Split CoreCurrent Transformerinova nechokwadi chekuti data rakavimbika rinoenderana nemari yepurojekiti uye mashandiro ebasa.
Kuongorora Yako Yakapatsanuka Yazvino Shanduko Yekuchengetedza uye Nzvimbo
Cheki yekupedzisira yenyanzvi inosanganisira kusimbisa zvitupa zvekuchengetedza uye kuongorora nzvimbo yekuisa. Aya matanho anovimbisa akasarudzwaSplit Core Current Transformerinoshanda zvakavimbika uye zvakachengeteka kwehupenyu hwayo hwese hwesevhisi. Kuregeredza maonesheni aya kunogona kukonzera kukundikana nguva isati yakwana, njodzi dzekuchengetedza, uye kusatevedzera mitemo yedunhu.
Kutsvaga UL, CE, uye Zvimwe Zvitupa
Zvitupa zvekuchengetedza hazvigone kutaurirana. Vanosimbisa kuti chigadzirwa chakayedzwa nesangano rakazvimirira kuti risangane nechengetedzo chaiyo uye maitiro ekuita. MuNorth America, nyanzvi inofanirwa kutsvaga chiratidzo cheUL kana ETL. MuEurope, mucherechedzo weEC unosungirwa.
Mucherechedzo weEC unoratidza kutevedzera mirairo yeEuropean Union, sengeLow Voltage Directive. Kuisa chiratidzo ichi, mugadziri anofanira:
- Ita ongororo yenjodzi yakakwana kuona uye kuderedza njodzi dzinogona kuitika.
- Ita bvunzo dzekuenderana zvinoenderana neyakaenderana zviyero.
- Kupa zviri pamutemoDeclaration of Conformity, gwaro remutemo rinotora mutoro wekuteerera kwechigadzirwa.
- Chengetedza zvinyorwa zvehunyanzvi, kusanganisira kuongororwa kwenjodzi uye mirayiridzo yekushandisa.
Gara uchiona kuti zvitupa ndezvechokwadi uye zvinoshanda kune chaiyo modhi iri kutengwa. Uku kungwarira kwakakodzera kunodzivirira zvese zvishandiso nevashandi.
Kuongorora Mamiriro Ekuisa
Mamiriro ekunze anokanganisa zvakanyanya hupenyu hweCT uye huchokwadi. Nyanzvi inofanirwa kuongorora zvinhu zvitatu zvakakosha: tembiricha, mwando, uye zvinosvibisa.
Operating Temperature:Yese CT ine yakatarwa tembiricha yekushanda. Mamwe mamodheru anoshanda kubva-30°C kusvika 55°C, nepo vamwe, sevamwe Hall Effect sensors, vanogona kubata-40°C kusvika +85°C. Nyanzvi inofanirwa kusarudza mudziyo wakatemerwa tembiricha yepakati penzvimbo yekuisa, kubva kuhusiku hwechando hunotonhora kusvika pazuva rinopisa rezhizha.
Unyoro uye Ingress Dziviriro (IP): High humidity uye zvakananga mvura kuratidzwainjodzi huru.Hunyoro hunogona kukanganisa insulation, corrode metal components, uye kutungamirira kune kukanganisa kwemagetsi. TheIngress Dziviriro (IP) chiyeroinoratidza kusamira kwemudziyo kuguruva nemvura.
| IP Rating | Dust Protection | Kudzivirira Mvura |
|---|---|---|
| IP65 | Dust tight | Kudzivirirwa kubva kune yakaderera-kudzvinyirira mvura jets |
| IP67 | Dust tight | Kudzivirirwa kubva pakunyudzwa kusvika 1m |
| IP69K | Dust tight | Kudzivirirwa kubva pakuchenesa-jet-jet |
Chiyero cheIP65 chinowanzokwana kune zvakavharirwa-chinangwa-chakavharwa. Nekudaro, kuiswa kwekunze kungangoda IP67 yekudzivirira kubva pakunyudzwa. Kunzvimbo dzakaomarara dzekugezera, sepakugadzira chikafu, aIP69K-yakatemerwaSplit Core Current Transformer yakakosha.
Corrosive Atmospheres:Nzvimbo dziri pedyo nemhenderekedzo yegungwa kana zvirimwa zvemaindasitiri zvinogona kuva nemunyu kana makemikari mumhepo. Izvi zvinokuvadza zvinomhanyisa kushatiswa kwedzimba dzeCT uye zvinhu zvemukati. Munzvimbo dzakadai, nyanzvi inofanirwa kusarudza CT ine zvinhu zvakasimba, zvisingaite corrosion uye zvivharo zvakavharwa.
Nyanzvi inovimbisa kudzoreredzwa kwakabudirira nekutevera cheki chekupedzisira. Izvi zvinosimbisa iyo Split Core Current Transformer inosangana nezvinodiwa zveprojekiti.
- Window size:Inokodzera conductor dhayamita.
- Amperage:Inodarika iyo yakawanda yedunhu mutoro.
- Chiratidzo chekubuda:Inofananidzwa nekuisa mita.
- Accuracy Kirasi:Inokodzera application (kubhadhara maringe nekutarisa).
Nyanzvi inofanirwa kugara ichisimbisa iyo yakasarudzwa Split Core Current Transformer inoenderana zvizere ne metering hardware. Kuisa pamberi mamodheru ane akakodzera kuchengetedza zvitupa zvedunhu zvinodzivirira vese vashandi nemidziyo.
FAQ
Chii chinoitika kana technician akaisa CT kumashure?
Nyanzvi inoisa CT kumashure inodzosera kumashure kuyerera kwezvino kuyerera. Izvi zvinoita kuti mita iratidze kuverengwa kwesimba kusina kunaka. Pazviyero zvakaringana, museve kana label pane CT imba inofanirwa kunongedza munzira yekuyerera kwazvino, yakananga kumutoro.
Ko nyanzvi inogona kushandisa CT hombe kune akawanda maconductor?
Ehe, nyanzvi inogona kupfuudza akawanda maconductor kuburikidza neCT imwe chete. Iyo CT ichayera mambure (vector sum) yemhepo. Iyi nzira inoshanda pakutarisa simba rose. Hazvina kukodzera kuyera kushandiswa kwedunhu rega rega.
Sei 333mV CT yangu ichiverenga zvisiri izvo?
Kurava kusina kururama kunowanzobva mukusawirirana pakati peCT nemamita. Nyanzvi inofanirwa kusimbisa kuti mita yakagadziriswa 333mV yekupinda. Kushandisa 333mV CT ine mita uchitarisira kupinza 5A kunoburitsa data risiri chairo.
Ikozvino transformer inoda simba rayo pachayo here?
Aiwa, yakajairwa passive CT haidi rekunze simba sosi. Inokohwa simba zvakananga kubva kune magnetic field ye conductor yainoyera. Izvi zvinorerutsa kuisa uye kuderedza wiring kuoma. Active sensors, senge mamwe maHall Effect zvishandiso, angangoda simba rekubatsira.
Nguva yekutumira: Nov-11-2025