Indlela yokukhetha iSplit Core Transformer yangoku yeRetrofit Application

AWG	Ububanzi (ngaphakathi)	Ububanzi (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

Ufakelo olunee-conductor ezininzi ezidityaniswe kunye zifuna ingqwalasela eyodwa. Ifestile yeCT kufuneka ibenkulu ngokwaneleyo ukurhangqa yonke inyanda. IUmjikelezo odityanisiweyo weengcingo ezidityanisiweyo uyalela ubuncinci befestile obufunekayo.

Ingcebiso yePro:Ifestile yeCT kufuneka ilinganengobunewunewu malunga nentambo okanye ibhasi. I-snug fit inokwenza ukufakela kube nzima, ngelixa indawo yokuvula engaphezulu kakhulu inokwazisa iimpazamo zomlinganiselo. Injongo kukulungeleka kakuhle ngaphandle kwendawo engenanto ebalulekileyo.

Ukumisela Elona nqanaba liphezulu langoku

Emva kokuqinisekisa ukufaneleka komzimba, inyathelo elilandelayo kukukhetha umlinganiselo ochanekileyo we-amperage. Ireyithingi ephambili yangoku yeCT mayibe nkulu kunowona mgangatho uphezulu ulindelekileyo wesekethe ebekwe esweni. Olu reyithingi ayilohambo lohambo lomahluli wesekethe kodwa lolona mlinganiselo uphezulu ozinzileyo umthwalo uya kutsala.

Umchwephesha kufuneka aphendule ngokunyuka okunokwenzeka kwexesha elizayo kumthwalo wombane. Esi senzo sithintela isidingo sokutshintshwa kweendleko kamva.

Ushishino oluqhelekileyo olusebenzayo kukukhetha i-CT enomlinganiselo ophambili okhoyo125%yowona mthwalo uphezulu oqhubekayo. Esi sithinteli se-25% sibonelela ngomda wokhuseleko kulwandiso lwexesha elizayo kwaye luthintela i-CT ekubeni igcwele.

Umzekelo, ukuba umthwalo oqhubekayo wesekethe ngu-80A, igcisa liya kubala ubuncinci bokureyithwa kwe-CT njenge.80A * 1.25 = 100A. Kule meko, i-100A Split Core Current Transformer iya kuba yinto efanelekileyo yokukhetha. Ukunciphisa i-CT kunokukhokelela kwi-core saturation, okubangelwa ukufundwa okungachanekanga kunye nomonakalo onokwenzeka. Ngakolunye uhlangothi, ukugqithisa okuphawulekayo kunokunciphisa ukuchaneka kumanqanaba aphantsi angoku, ngoko ukufumana ibhalansi efanelekileyo kubalulekile.

Ukutshatisa umqondiso wesiphumo kwimitha yakho

Nje ukuba igcisa liqinisekise ubungakanani bomzimba, umsebenzi olandelayo obalulekileyo kukuqinisekisa ukuhambelana kombane. I-Split Core Current Transformer isebenza njengenzwa, iguqula i-primary current ephezulu ibe ngumqondiso wezinga eliphantsi. Olu phawu lwemveliso kufuneka lungqinelane ncakasana noko imitha yamandla okanye isixhobo sokubeka iliso senzelwe ukwamkela. Umdlalo ongachanekanga uya kukhokelela kwidatha engalunganga okanye, kwezinye iimeko, umonakalo kwisixhobo.

Ukuqonda Iziphumo eziqhelekileyo zeCT (5A, 1A, 333mV)

Iziguquli zangoku ziyafumaneka kunye neempawu ezininzi zemveliso ezisemgangathweni. Iintlobo ezintathu eziqhelekileyo ezifunyenwe kwizicelo ze-retrofit ziyi-5 Amp (5A), i-1 Amp (1A), kunye ne-333 millivolt (333mV). Ngamnye uneempawu ezahlukileyo kwaye ulungele iimeko ezahlukeneyo.

5A kunye ne-1A Iziphumo:Ezi ziziphumo zemveli zangoku. I-CT ivelisa i-second current ehambelana ngokuthe ngqo ne-primary current. Ngokomzekelo, i-100: i-5A CT iya kuvelisa i-5A kwisibini sayo xa i-100A ihamba ngomqhubi oyintloko. Ngelixa i-5A ibingumgangatho wembali, iziphumo ze-1A zifumana ukuthandwa kufakelo olutsha.

⚠️ Isilumkiso esibalulekileyo soKhuseleko:I-CT ene-5A okanye i-1A imveliso ngumthombo wangoku. Umjikelo wayo wesibini kufunekasozeishiywe ivuliwe ngelixa i-conductor yokuqala inikwe amandla. Isekondari evulekileyo inokuvelisaamandla ombane aphezulu kakhulu, ayingozi(kaninziamawaka eevolthi), kubeka ingozi enkulu yokothuka. Le meko inokubangela ukuba i-core ye-CT igqithise kwaye ingaphumeleli, inokutshabalalisa i-CT kunye nokonakalisa izixhobo ezixhunyiwe. Ngalo lonke ixesha qinisekisa ukuba iitheminali eziziisekondari zifutshane okanye ziqhagamshelwe kwimitha ngaphambi kokunika amandla isekethe yokuqala.

Iukhetho phakathi kwe-1A kunye ne-5A ephumayokaninzi ixhomekeke kumgama wemitha kunye neenkcukacha zeprojekthi.

333mV Imveliso:Olu hlobo lwe-CT luvelisa isignali ye-voltage ephantsi. Ezi CTs zikhuselekile ngokwendalo ngenxa yokuba zine-resistor eyakhelwe-ngaphakathi yomthwalo eguqula umsinga wesibini kwi-voltage. Olu luyilo luthintela ingozi ephezulu ye-voltage ehambelana ne-open-circuiting i-1A okanye i-5A CT. Umqondiso we-333mV ngumgangatho oqhelekileyo weemitha zamandla zanamhlanje zedijithali.

Olunye uhlobo loluvo, iIkhoyili yeRogowski, iphinda ivelise imveliso yezinga le-millivolt. Nangona kunjalo, ifuna isihlanganisi esahlukileyo ukuze isebenze ngokuchanekileyo. Iikhoyili zeRogowski zibhetyebhetye kwaye zilungele ukulinganisa imisinga ephezulu kakhulu okanye kwizicelo ezinoluhlu olubanzi lwamaza, kodwa aziyifanelanga imithwalo.phantsi kwe20A.

Ukuqinisekisa iiMfuno zeNgeniso zemitha yakho

Owona mgaqo usisiseko wokhetho lweCT kukuba imveliso yeCT kufuneka ihambelane negalelo lemitha. Imitha eyenzelwe igalelo le-333mV ayikwazi ukufunda isignali ye-5A, kwaye ngokuphambene. Le nkqubo yokuqinisekisa ibandakanya ukujonga i-database kunye nokuqonda ingqikelelo yomthwalo.

Okokuqala, uchwepheshe kufuneka achonge uhlobo lwegalelo elichazwe ngumenzi weemitha. Olu lwazi ludla ngokuprintwa kwileyibhile yesixhobo okanye icaciswe kwincwadana yayo yofakelo. Igalelo liya kuchazwa ngokucacileyo njenge-5A, 1A, 333mV, okanye elinye ixabiso elithile.

Okwesibini, igcisa kufuneka liqwalasele itotaliumthwalokwi-CT. Umthwalo ngumthwalo opheleleyo oqhagamshelwe kwisekondari ye-CT, elinganiselwa kwiVolt-Amps (VA) okanye i-Ohms (Ω). Lo mthwalo uquka:

• I-impedance yangaphakathi yemitha ngokwayo.
• Ukuchasana kweengcingo ezikhokelayo ezihamba ukusuka kwi-CT ukuya kwimitha.
• Ukuphazamiseka kwazo naziphi na ezinye izixhobo eziqhagamshelweyo.

Yonke i-CT ine-aubungakanani bomthwalo omkhulu(umz., 1VA, 2.5VA, 5VA). Ukugqithiswa kolu mlinganiselo kuya kubangela ukuba i-CT ilahlekelwe kukuchaneka. Njengoko le theyibhile ingezantsi ibonisa, iI-impedance yegalelo lemitha iyahlukakakhulu ngokohlobo, eliyinxalenye enkulu yeumthwalo opheleleyo.

I-impedance ephantsi yemitha ye-5A yenzelwe ukuba ibe yisekethe ekufutshane-emfutshane, ngelixa i-impedance ephezulu yemitha ye-333mV yenzelwe ukulinganisa i-voltage ngaphandle kokudweba okubalulekileyo okwangoku.

Ingcebiso yePro:Soloko ujongana namaxwebhu omenzi kuzo zombini i-CT kunye nemitha. Abavelisi abaninzi babonelelaiitafile zokuhambelanaoludwelisa ngokucacileyo ukuba zeziphi iimodeli ze-CT ezivunyiweyo ukuba zisetyenziswe ngeemitha ezithile okanye ii-inverters. Ukuthelekisa la maxwebhu yeyona ndlela iqinisekileyo yokuqinisekisa ukufakela okuyimpumelelo.

Ngokomzekelo, umenzi we-inverter unokubonelela ngetshathi ebonisa ukuba i-"Model X" ye-hybrid inverter ihambelana kuphela ne-"Eastron SDM120CTM" imitha kunye ne-CT ehambelana nayo. Ukuzama ukusebenzisa i-CT eyahlukileyo, nokuba inesignali echanekileyo yokuphuma, kunokuphelisa iziqinisekiso okanye kukhokelela ekusebenzeni kakubi kwenkqubo.

Ukukhetha iKlasi yokuChaneka eLungileyo kwiSicelo sakho

Emva kokulinganisa i-CT kunye nokulinganisa imveliso yayo, ingcali kufuneka ikhethe iklasi yokuchaneka efanelekileyo. Olu luhlu luchaza ukuba isiphumo sesibini se-CT simele kangakanani esona siphumo sikhoyo. Ukukhetha iklasi echanekileyo iqinisekisa ukuba idatha eqokelelweyo inokuthenjwa ngokwaneleyo kwinjongo yayo, nokuba kukuhlawula okubalulekileyo okanye ukubeka iliso ngokubanzi. Ukukhetha okungafanelekanga kunokukhokelela ekungangqinelani kwezemali okanye kwizigqibo zokusebenza ezineziphene.

Ukuchaza iiklasi zokuchaneka kweCT

Imigangatho yamazwe ngamazwe, njengeIEC 61869-2, chaza iiklasi zokuchaneka kwe-CT. Lo mgangatho uxela impazamo evumelekileyo kwiipesenti ezahlukeneyo ze-CT's rated current. Umahluko ophambili ukhona phakathi kweeklasi eziqhelekileyo kunye neeklasi ezikhethekileyo, ezingqongqo ngakumbi.

• Umgangatho we-IEC 61869-2 uchaza iimfuno zokusebenza kuzo zombini impazamo yomlinganiselo wangoku kunye nokufuduswa kwesigaba.
• IiCTs zeklasi ezikhethekileyo ze-'S' (umz., iKlasi 0.5S) zinemida yeempazamo ezingqongqo kumanqanaba aphantsi angoku xa kuthelekiswa nemigangatho yazo eqhelekileyo (umz., iKlasi 0.5).
• Ngokomzekelo, kwi-5% ye-current rated, i-Class 0.5 CT ingaba ne-Impazamo eyi-1.5%, ngelixa iKlasi 0.5S CT kufuneka ibe ngaphakathi kwe-0.75%..

Ukuchaneka kubandakanya okungakumbi kunobukhulu obukhoyo. Ikwabandakanyaukufuduswa kwesigaba, okanye impazamo yesigaba. Eli lixesha lokulibaziseka phakathi kwe-waveform yangoku ephambili kunye ne-wave wave waveform yesibini. Nokuba impazamo yesigaba esincinci inokuchaphazela ukubala kwamandla.

Ungayikhetha nini iBilling-Grade vs. Monitoring-Grade Accuracy

Isicelo sichaza ukuchaneka okufunekayo. IiCTs ngokubanzi ziwela kwiindidi ezimbini: ibakala lokuhlawula kunye nebakala lokubeka iliso.

Ibakala lokubhilaIiCTs (umz., iKlasi 0.5, 0.5S, 0.2) ziyimfuneko kwizicelo zengeniso. Xa inkampani eluncedo okanye umnini-mhlaba ehlawula umqeshi wokusetyenziswa kwamandla, umlinganiselo kufuneka uchaneke kakhulu. AImpazamo yesigaba esincinci inokubangela ukungachaneki okubalulekileyo kumlinganiselo wamandla asebenzayo, ngakumbi kwiinkqubo ezinomlinganiselo ophantsi wamandla. Oku kuguqulela ngokuthe ngqo kwiintlawulo zemali ezingachanekanga.

Imilinganiselo yamandla engachanekanga kwimpazamo yesigaba nayo inokubangela iingxaki ezingaphaya kokuhlawula. Kwiinkqubo zezigaba ezintathu, kunokukhokelelaimithwalo engalinganiyo kunye noxinzelelo lwezixhobo. Isenokubangela ukuba iireyidi zokhuselo zingasebenzi, ukudala imingcipheko yokhuseleko.

Ibanga lokubeka ilisoIiCTs (umz., iKlasi 1.0 nangaphezulu) zifanelekile kulawulo lwamandla ngokubanzi. Amagcisa asebenzisela ukulandelela ukusebenza kwesixhobo, ukuchonga iipateni zomthwalo, okanye ukwaba iindleko ngaphakathi. Kule misebenzi, iqondo elisezantsi kancinane lokuchaneka liyamkeleka. Ukukhetha i-Split Core ekuneneIsiguquli sangokuiqinisekisa imfezeko yedatha ihambelana nenkxaso yemali kunye nokusebenza kweprojekthi.

Ukuqinisekisa iSplit Core yakho yangoku yeTransformer yoKhuseleko kunye nokusiNgqongileyo

Ukuhlolwa kokugqibela kwegcisa kubandakanya ukuqinisekisa iziqinisekiso zokhuseleko kunye nokuvavanya indawo yofakelo. La manyathelo aqinisekisa okukhethiweyoYahlula iNguqulelo engundoqo yangokuisebenza ngokuthembekileyo nangokukhuselekileyo ubomi bayo bonke benkonzo. Ukungahoywa kwezi ziqinisekiso kunokukhokelela ekungaphumelelini kwangaphambi kwexesha, iingozi zokhuseleko, kunye nokungahambelani nemimiselo yengingqi.

Ukukhangela i-UL, CE, kunye nezinye iziQinisekiso

Iziqinisekiso zokhuseleko azixoxiswana. Baqinisekisa ukuba imveliso ihlolwe ngumbutho ozimeleyo ukuhlangabezana nemigangatho ethile yokhuseleko kunye nokusebenza. ENyakatho Melika, ingcali kufuneka ijonge uphawu lwe-UL okanye lwe-ETL. EYurophu, uphawu lwe-CE lunyanzelekile.

Inqaku le-CE libonisa ukuthotyelwa kwemiyalelo ye-European Union, efana neUmyalelo wombane ophantsi. Ukusebenzisa olu phawu, umenzi kufuneka:

1. Yenza uhlolo olululo lomngcipheko ukuchonga kunye nokunciphisa iingozi ezinokubakho.
2. Yenza iimvavanyo zokuthobela ngokwemigangatho engqinelanayo.
3. Khupha ngokusesikweniIsibhengezo sokuThobela, uxwebhu olusemthethweni oluthatha uxanduva lokuthotyelwa kwemveliso.
4. Gcina amaxwebhu obugcisa, kubandakanywa uhlalutyo lomngcipheko kunye nemiyalelo yokusebenza.

Ngalo lonke ixesha qinisekisa ukuba izatifikethi ziyinyani kwaye zisebenza kwimodeli ethile ethengwayo. Oku kunyamekela ngokufanelekileyo kukhusela zombini izixhobo kunye nabasebenzi.

Uvavanyo lweNdawo yokuFakela

Ubume bomzimba buchaphazela kakhulu ubomi obude kunye nokuchaneka kweCT. Igcisa lifanele livavanye izinto ezintathu eziphambili: ubushushu, ukufuma, nezinto ezingcolisayo.

Ubushushu bokusebenza:Yonke i-CT inoluhlu oluchaziweyo lweqondo lokushisa. Ezinye iimodeli zisebenza ukusuka-30°C ukuya kuma-55°C, ngelixa abanye, njengeenzwa ezithile zeHolo Effect, banokusingatha-40°C ukuya +85°C. Igcisa kufuneka likhethe isixhobo esinikwe umlinganiselo wamaqondo obushushu akwindawo yokufakela, ukusuka kobona busuku bubandayo basebusika ukuya kolona suku lushushu lwasehlotyeni.

Ukhuseleko lokufuma kunye nokuNgena (IP): Ukufuma okuphezulu kunye nokutyhileka ngokuthe ngqo kwamanzizizisongelo ezinkulu.Ubumanzi bunokuthoba umgangatho wokugquma, zidle izinto zentsimbi, kwaye zikhokelela kwiziphene zombane. IUmgangatho woKhuseleko lwe-Ingress (IP).ibonisa ukuxhathisa kwesixhobo kuthuli namanzi.

Ireyithingi ye-IP65 ihlala yanele kwizivalo zenjongo jikelele. Nangona kunjalo, ufakelo lwangaphandle lunokufuna i-IP67 yokhuseleko ekuntywilisweni. Kwiindawo zokuhlambela ezirhabaxa, ezinje ngokulungisa ukutya, iIP69K-ikalweI-Slit Core Transformer yangoku ibalulekile.

Imimoya eNcincisayo:Iindawo ezikufuphi nonxweme okanye iifektri zinokuba netyuwa okanye iikhemikhali emoyeni. Ezi arhente zitshabalalisayo zikhawulezisa ukonakaliswa kwezindlu zeCT kunye namalungu angaphakathi. Kwiimeko ezinjalo, igcisa kufuneka likhethe i-CT enezixhobo ezomeleleyo, ezimelana nokudleka kunye neendawo ezivaliweyo.

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Igcisa liqinisekisa ukubuyiswa kwakhona okuyimpumelelo ngokulandela uluhlu lokugqibela lokukhangela. Oku kuqinisekisa ukuba iSplit Core Current Transformer ihlangabezana nazo zonke iimfuno zeprojekthi.

• Ubungakanani befestile:Ifaka i-diameter ye-conductor.
• I-Amperage:Ukugqithisa ubuninzi bomthwalo wesekethe.
• Umqondiso Wesiphumo:Itshatisa igalelo lesilinganisi-manzi.
• Iklasi yokuchaneka:Iyasifanela isicelo (intlawulo xa ithelekiswa nokubeka iliso).

Igcisa kufuneka lihlale liqinisekisa iSplit Core Current Transformer ekhethiweyo iyahambelana ngokupheleleyo ne-hardware yokulinganisa. Ukubeka phambili iimodeli ezinezatifikethi zokhuseleko ezifanelekileyo zommandla zikhusela abasebenzi kunye nezixhobo.

FAQ

Kwenzeka ntoni ukuba igcisa lifakela iCT ngasemva?

Igcisa elifaka i-CT ngasemva libuyisela umva i-polarity yangoku. Oku kubangela ukuba imitha ibonise ukufundwa kwamandla okungalunganga. Ukulinganisa okuchanekileyo, utolo okanye ileyibhile kwizindlu ze-CT kufuneka zikhombe kwicala lokuhamba kwangoku, ukuya kumthwalo.

Ngaba igcisa lingasebenzisa i-CT enkulu kubaqhubi abaninzi?

Ewe, igcisa linokudlulisa abaqhubi abaninzi ngeCT enye. I-CT iya kulinganisa i-net (vector sum) yemisinga. Le ndlela isebenza ukujonga amandla ewonke. Ayifanelekanga ukulinganisa ukusetyenziswa kwesekethe nganye.

Kutheni i-333mV CT yam ifundeka ngendlela engachanekanga?

Ufundo olungachanekanga ludla ngokuba lubangelwa kukungahambelani phakathi kwe-CT nesilinganisi-manzi. Igcisa kufuneka liqinisekise ukuba imitha ilungiselelwe igalelo le-333mV. Ukusebenzisa i-333mV CT enemitha elindele igalelo le-5A iya kuvelisa idatha engachanekanga.

Ngaba i-transformer yangoku idinga umthombo wayo wamandla?

Hayi, i-CT ye-passive eqhelekileyo ayifuni umthombo wamandla wangaphandle. Ivuna amandla ngokuthe ngqo kwi-magnetic field ye-conductor eyilinganisa. Oku kwenza ukufakela kube lula kwaye kunciphisa ubunzima be-wiring. Izinzwa ezisebenzayo, njengezinye izixhobo zeHolo Effect, zinokufuna amandla ancedisayo.