Indlela Yokukhetha I-Split Core Current Transformer ye-Retrofit 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

Ukufakwa okunamakhondatha amaningi ahlanganiswe ndawonye kudinga ukunakwa okukhethekile. Iwindi le-CT kufanele libe likhulu ngokwanele ukuzungeza yonke inqwaba. IIsiyingi esihlanganisiwe sezintambo ezihlanganisiwe sibeka ubuncane bosayizi wewindi odingekayo.

Ithiphu yePro:Iwindi le-CT kufanele lilinganengokunethezeka eduze kwekhebula noma ibha yebhasi. Ukulingana okuqinile kungenza ukufaka kube nzima, kuyilapho indawo emboza usayizi oweqile ingasethula amaphutha okulinganisa. Umgomo uwukulingana okunethezekile ngaphandle kwesikhala esingenalutho esibalulekile.

Ukunquma Isilinganiso Esiphezulu Samanje

Ngemva kokuqinisekisa ukulingana ngokomzimba, isinyathelo esilandelayo ukukhetha isilinganiso esifanele se-amperage. Isilinganiso samanje esiyinhloko se-CT kufanele sibe sikhulu kunomkhawulo wamanje olindelwe wesekethe egadiwe. Lesi silinganiso akusona isilinganiso sohambo lwe-circuit breaker kodwa i-amperage ephakeme kakhulu eqhubekayo umthwalo ozodonsa.

Uchwepheshe kufanele alandise ngokunyuka okungaba khona komthamo kagesi esikhathini esizayo. Lo mkhuba uvimbela isidingo sokushintshwa okubizayo kamuva.

Umkhuba ojwayelekile womkhakha ukukhetha i-CT enezilinganiso eziyisisekelo125%yomthwalo omkhulu oqhubekayo. Le buffer engu-25% ihlinzeka ngemajini yokuphepha yokunwetshwa okuzayo futhi ivimbela i-CT ekugcwaleni.

Isibonelo, uma ubukhulu bomthwalo oqhubekayo wesekethe kungu-80A, uchwepheshe angabala isilinganiso esincane se-CT njenge80A * 1.25 = 100A. Kulokhu, i-100A Split Core Current Transformer kungaba ukukhetha okufanele. Ukunciphisa i-CT kungaholela ekugcwalisweni okuyisisekelo, okuholela ekufundweni okungalungile kanye nomonakalo ongaba khona. Ngokuphambene, ukweqisa okuphawulekayo kunganciphisa ukunemba emazingeni aphansi amanje, ngakho ukuthola ibhalansi efanele kubalulekile.

Ukufanisa Isignali Yokuphumayo Nemitha Yakho

Uma uchwepheshe eseqinisekise usayizi womzimba, umsebenzi olandelayo obalulekile uwukuqinisekisa ukuhambisana kukagesi. I-Split Core Current Transformer isebenza njengenzwa, iguqule amandla amanje aphezulu abe isignali yezinga eliphansi. Lesi siginali yokuphumayo kufanele ifane ngokunembile nalokho imitha yamandla noma idivayisi yokuqapha eklanyelwe ukwamukele. Ukufanisa okungalungile kuzoholela kudatha enephutha noma, kwezinye izimo, ukulimala kwezinto zokusebenza.

Ukuqonda Imiphumela Ejwayelekile Ye-CT (5A, 1A, 333mV)

Ama-transformer amanje ayatholakala ngamasignali amaningana okukhiphayo ajwayelekile. Izinhlobo ezintathu ezivame kakhulu ezitholakala ezinhlelweni ze-retrofit yi-5 Amp (5A), 1 Amp (1A), kanye ne-333 millivolt (333mV). Ngayinye inezici ezihlukile futhi ifanele izimo ezihlukene.

5A kanye no-1A Imiphumela:Lena imiphumela yamanje evamile. I-CT ikhiqiza i-current yesibili elingana ngokuqondile ne-primary current. Isibonelo, i-100:5A CT izokhiqiza i-5A kwesesibili lapho i-100A igeleza ku-conductor oyinhloko. Ngenkathi i-5A bekuyindinganiso yomlando, imiphumela ye-1A ithola ukuduma ekufakweni okusha.

⚠️ Isexwayiso Esibalulekile Sokuphepha:I-CT ene-5A noma i-1A ephumayo ingumthombo wamanje. Isekhethi yayo yesibili kufanelenezeishiywe ivuliwe ngenkathi i-conductor yokuqala inikwe amandla. Isesibili esivuliwe singakhiqizaama-voltage aphezulu kakhulu, ayingozi(ngokuvamileizinkulungwane zama-volts), kubeka ingozi enkulu yokushaqeka. Lesi simo futhi singabangela umgogodla we-CT ukuthi ushise kakhulu futhi ungaphumeleli, okungase kucekeleke phansi i-CT futhi kulimaze amadivayisi axhunyiwe. Njalo qinisekisa ukuthi amatheminali esibili afinyeziwe noma axhunywe kumitha ngaphambi kokunika amandla isekethe eyinhloko.

Iukukhetha phakathi kokuphumayo okungu-1A no-5Angokuvamile kuncike ebangeni lemitha kanye nemininingwane yephrojekthi.

333mV Okukhiphayo:Lolu hlobo lwe-CT lukhiqiza isignali ye-voltage yezinga eliphansi. Lawa ma-CTs aphephile ngokwemvelo ngenxa yokuthi anezinto ezimelana nomthwalo ezakhelwe ngaphakathi eziguqula amandla esibili abe amandla kagesi. Lo mklamo uvimbela ingozi ye-voltage ephezulu ehlobene nokujikeleza okuvulekile kwe-1A noma i-5A CT. Isignali engu-333mV iyindinganiso evamile yamamitha wamandla edijithali yesimanje.

Olunye uhlobo lwenzwa, iIkhoyili ye-Rogowski, futhi ikhiqiza okukhiphayo kwezinga le-millivolt. Nokho, idinga isihlanganisi esihlukile ukuze isebenze kahle. Amakhoyili e-Rogowski ayavumelana nezimo futhi alungele ukukala ama-curls aphezulu kakhulu noma ezinhlelweni ezinobubanzi obubanzi befrikhwensi, kodwa ngokuvamile awafanele ukulayishwa.ngaphansi kwe-20A.

Ukuqinisekisa Izidingo Zokufaka Imitha Yakho

Umthetho obaluleke kakhulu wokukhetha i-CT ukuthi okukhiphayo kwe-CT kufanele kufane nokokufaka kwemitha. Imitha eyakhelwe okokufaka okungu-333mV ayikwazi ukufunda isignali engu-5A, ngokuphambene nalokho. Le nqubo yokuqinisekisa ihlanganisa ukuhlola ama-database kanye nokuqonda umqondo womthwalo.

Okokuqala, uchwepheshe kufanele ahlonze uhlobo lokufakwayo olucaciswe umkhiqizi wamamitha. Lolu lwazi luvamise ukuphrintwa kulebula yedivayisi noma lunemininingwane encwadini yalo yokufaka. Okokufaka kuzoshiwo ngokucacile njengokuthi 5A, 1A, 333mV, noma elinye inani elithile.

Okwesibili, uchwepheshe kufanele acabangele ingqikithiumthwaloku-CT. Umthwalo isamba somthwalo oxhunywe kwesesibili se-CT, esilinganiswa ngeVolt-Amps (VA) noma i-Ohms (Ω). Lo mthwalo uhlanganisa:

• I-impedance yangaphakathi yemitha ngokwayo.
• Ukumelana nezintambo eziholayo ezisuka ku-CT ziye kumitha.
• Ukuphazamiseka kwanoma imaphi amanye amadivayisi axhunyiwe.

Yonke i-CT ine-aisilinganiso esiphezulu somthwalo(isb, 1VA, 2.5VA, 5VA). Ukweqa lesi silinganiso kuzobangela i-CT ukuthi ilahlekelwe ukunemba. Njengoba ithebula elingezansi libonisa, iI-impedance yokufaka yemitha iyahlukahlukakakhulu ngohlobo, okuyingxenye enkulu yeumthwalo ophelele.

I-impedance ephansi yemitha ye-5A yakhelwe ukuba ibe yisekethe eseduze-efushane, kuyilapho i-impedance ephezulu yemitha engu-333mV yakhelwe ukukala i-voltage ngaphandle kokudweba okwamanje okubalulekile.

Ithiphu yePro:Hlala ubheka imibhalo yomkhiqizi yakho kokubili i-CT nemitha. Abakhiqizi abaningi bayahlinzekaamathebula ukuhambisanaolubeka ngokucacile ukuthi yimaphi amamodeli e-CT agunyazwe ukusetshenziswa namamitha athile noma iziguquli. Ukuhlanganisa lezi zincwadi kuyindlela eqinisekile yokuqinisekisa ukufakwa ngempumelelo.

Isibonelo, umkhiqizi oguquguqukayo angase ahlinzeke ngeshadi elibonisa ukuthi isiguquli se-hybrid se-“Model X” sihambisana kuphela nemitha ye-“Eastron SDM120CTM” kanye ne-CT ehlotshaniswa nayo. Ukuzama ukusebenzisa i-CT ehlukile, ngisho nesignali elungile yokuphumayo, kungase kuqede iziqinisekiso noma kuholele ekungasebenzini kahle kwesistimu.

Ukukhetha Ikilasi Lokunemba Elilungile lesicelo sakho

Ngemva kokulinganisa i-CT nokufanisa okukhiphayo, uchwepheshe kufanele akhethe isigaba sokunemba esifanele. Lesi silinganiso sichaza ukuthi okukhiphayo kwesibili kwe-CT kuyimela ngokuseduze kangakanani imanje eyinhloko yangempela. Ukukhetha ikilasi elilungile kuqinisekisa ukuthi idatha eqoqiwe ithembekile ngokwanele ngokwezinjongo zayo ezihlosiwe, kungaba ngeyokukhokha okubalulekile noma ukuqapha okuvamile. Ukukhetha okungafanele kungaholela ekuhlukeni kwezezimali noma ezinqumweni zokusebenza ezinephutha.

Ukuchaza Amakilasi Okunemba kwe-CT

Izindinganiso zamazwe ngamazwe, njengeI-IEC 61869-2, chaza amakilasi okunemba kwe-CT. Leli zinga licacisa iphutha elivumelekile kumaphesenti ahlukene wesilinganiso samanje se-CT. Umehluko obalulekile ukhona phakathi kwamakilasi ajwayelekile kanye namakilasi akhethekile, aqinile.

• Izinga le-IEC 61869-2 lichaza izidingo zokusebenza zazo zombili iphutha lesilinganiso samanje kanye nokususwa kwesigaba.
• Ama-CT ekilasi le-'S' akhethekile (isb, Ikilasi 0.5S) anemikhawulo eqinile yamaphutha emazingeni aphansi amanje uma kuqhathaniswa nozakwabo abajwayelekile (isb, Ikilasi 0.5).
• Isibonelo, ku-5% wamanje olinganiselwe, i-Class 0.5 CT ingaba ne-Iphutha elingu-1.5%, kuyilapho i-Class 0.5S CT kufanele ibe phakathi kuka-0.75%.

Ukunemba kuhilela okungaphezu nje kobukhulu bamanje. Kuhlanganisa futhiukususwa kwesigaba, noma iphutha lesigaba. Lesi ukubambezeleka kwesikhathi phakathi kwefomethi yegagasi yamanje eyinhloko kanye nefomu yesibili yokuphumayo. Ngisho nephutha lesigaba esincane lingaba nomthelela ekubalweni kwamandla.

Ungakhetha Nini Ibanga Elikhokhayo vs. Ukunemba Kwebanga Lokuqapha

Uhlelo lokusebenza lusho ukunemba okudingekayo. Ama-CTs ngokuvamile awela ezigabeni ezimbili: ibanga lokukhokhisa kanye nebanga lokuqapha.

Ibanga lokukhokhiswaAma-CTs (isb, Ikilasi 0.5, 0.5S, 0.2) abalulekile ekufakeni izicelo zemali engenayo. Uma inkampani yensiza noma umnikazi wendawo ekhokhisa isiqashi ngokusetshenziswa kwamandla, ukulinganisa kufanele kube nembe kakhulu. Aiphutha lesigaba esincane lingabangela ukungalungi okuphawulekayo esilinganisweni samandla asebenzayo, ikakhulukazi kumasistimu anesici samandla aphansi. Lokhu kuhumusha ngokuqondile ezindlekweni zezimali ezingalungile.

Izilinganiso zamandla ezingalungile ezivela ephutheni lesigaba nazo zingabangela izinkinga ezingaphezu kokukhokha. Ezinhlelweni zezigaba ezintathu, kungaholela kuimithwalo engalingani nokucindezeleka kwemishini. Ingase ibangele nokuba ukudluliselwa kokuvikela kungasebenzi kahle, ukudala izingozi zokuphepha.

Ibanga lokuqaphaAma-CT (isb, Ikilasi 1.0 nangaphezulu) afanele ukuphathwa kwamandla okuvamile. Ochwepheshe bawasebenzisela ukulandelela ukusebenza kwemishini, ukuhlonza amaphethini okulayisha, noma ukwaba izindleko ngaphakathi. Kule misebenzi, izinga eliphansi lokunemba liyamukeleka. Ukukhetha i-Split Core efaneleI-Transformer yamanjeiqinisekisa ubuqotho bedatha bufana nezimali zephrojekthi nokusebenza.

Ukuqinisekisa I-Split Core Yakho Yamanje Yokuguqula Ukuphepha Nendawo

Ukuhlolwa kokugcina kukachwepheshe kubandakanya ukuqinisekisa izitifiketi zokuphepha nokuhlola indawo yokufaka. Lezi zinyathelo ziqinisekisa okukhethiweHlukanisa i-Core Current Transformerisebenza ngokuthembekile nangokuphephile kuyo yonke impilo yayo yesevisi. Ukudebeselela lokhu kuqinisekisa kungaholela ekwehlulekeni ngaphambi kwesikhathi, ezingozini zokuphepha, kanye nokungathobeli imithetho yesifunda.

Ihlola i-UL, CE, nezinye izitifiketi

Izitifiketi zokuphepha azixoxiswana. Baqinisekisa ukuthi umkhiqizo uhlolwe yinhlangano ezimele ukuze uhlangabezane namazinga athile okuphepha nokusebenza. ENyakatho Melika, uchwepheshe kufanele abheke umaki we-UL noma we-ETL. EYurophu, uphawu lwe-CE luyimpoqo.

Umaki we-CE ukhombisa ukuhambisana neziqondiso ze-European Union, njengeI-Low Voltage Directive. Ukuze usebenzise lolu phawu, umenzi kufanele:

1. Yenza uhlolo olunzulu lwengozi ukuze kuhlonzwe futhi kuncishiswe izingozi ezingaba khona.
2. Yenza izivivinyo zokuhambisana ngokuvumelana nezindinganiso ezivumelanisiwe.
3. Khipha okusemthethweniIsimemezelo Sokuvumelana, idokhumenti yomthetho enesibopho sokuthobela umkhiqizo.
4. Gcina imibhalo yezobuchwepheshe, okuhlanganisa ukuhlaziywa kwengozi kanye nemiyalelo yokusebenza.

Njalo qinisekisa ukuthi izitifiketi ziyiqiniso futhi zisebenza kumodeli ethile ethengwayo. Lokhu kunakekela okufanele kuvikela kokubili amathuluzi nabasebenzi.

Ukuhlola Imvelo Yokufaka

Indawo ebonakalayo ithinta kakhulu impilo ende nokunemba kwe-CT. Uchwepheshe kufanele ahlole izici ezintathu ezibalulekile: izinga lokushisa, umswakama, nokungcola.

Izinga Lokushisa Lokusebenza:Yonke i-CT inebanga lokushisa elicacisiwe lokusebenza. Amanye amamodeli asebenza kusuka-30°C kuya ku-55°C, kuyilapho ezinye, njengezinzwa ezithile ze-Hall Effect, zingabamba-40°C kuya +85°C. Uchwepheshe kufanele akhethe idivayisi elinganiselwe izinga lokushisa lendawo yokufaka, kusukela kubusuku basebusika obubanda kakhulu kuya osukwini lwasehlobo olushisa kakhulu.

Ukuvikelwa Komswakama Nokungena (IP): Umswakama ophezulu kanye nokuchayeka emanzini okuqondileyizinsongo ezinkulu.Umswakama ungehlisa izinga lokushisa, konakala izakhi zensimbi, futhi kuholele emaphutheni kagesi. IIsilinganiso se-Ingress Protection (IP).kubonisa ukuthi idivayisi imelana nothuli namanzi.

Isilinganiso se-IP65 ngokuvamile sanele ezindaweni ezivalekile zenhloso evamile. Nokho, ukufakwa kwangaphandle kungase kudinge i-IP67 ukuze kuvikelwe ekucwilisweni. Ezindaweni zokugeza ezinzima, njengalapho kusetshenzwa khona ukudla, iIsilinganiso se-IP69KI-Split Core Current Transformer ibalulekile.

I-Corrosive Atmospheres:Izindawo eziseduze nogu noma izitshalo zezimboni zingase zibe nosawoti noma amakhemikhali emoyeni. Lezi zinto ezonakalisayo zisheshisa ukucekelwa phansi kwezindlu nezingxenye zangaphakathi ze-CT. Ezimweni ezinjalo, uchwepheshe kufanele akhethe i-CT enezinto eziqinile, ezimelana nokubola kanye nezivalo ezivaliwe.

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Uchwepheshe uqinisekisa ukubuyisela okuyimpumelelo ngokulandela uhlu lokuhlola lokugcina. Lokhu kuqinisekisa ukuthi i-Split Core Current Transformer ihlangabezana nazo zonke izidingo zephrojekthi.

• Usayizi Wewindi:Ilingana nobubanzi bekhondatha.
• I-Amperage:Yeqa ubukhulu bomthwalo wesekethe.
• Isiginali Yokuphumayo:Ifanisa okokufaka kwemitha.
• Ikilasi lokunemba:Ifanele isicelo (inkokhelo vs. nokuqapha).

Uchwepheshe kufanele ngaso sonke isikhathi aqinisekise ukuthi i-Split Core Current Transformer ekhethiwe ihambisana ngokugcwele nehadiwe yokulinganisa. Ukubeka phambili amamodeli anezitifiketi ezifanele zokuphepha zesifunda kuvikela kokubili izisebenzi nezisetshenziswa.

FAQ

Kwenzekani uma uchwepheshe efaka i-CT emuva?

Uchwepheshe ofaka i-CT emuva uhlehlisa i-polarity yamanje. Lokhu kubangela ukuthi imitha ibonise ukufundwa kwamandla okungalungile. Ukuze uthole izilinganiso ezifanele, umcibisholo noma ilebula endlini ye-CT kufanele ikhombe lapho kugeleza khona manje, kuya emthwalweni.

Ingabe uchwepheshe angasebenzisa i-CT eyodwa enkulu kuma-conductor amaningi?

Yebo, uchwepheshe angakwazi ukudlulisa ama-conductor amaningi nge-CT eyodwa. I-CT izokala inetha (isamba se-vector) yamaza. Le ndlela isebenzela ukuqapha amandla aphelele. Ayifanele ukukala ukusetshenziswa kwesifunda ngasinye.

Kungani i-333mV CT yami ifunda ngokungalungile?

Ukufundwa okungalungile kuvame ukuvela ngenxa yokungafani phakathi kwe-CT nemitha. Uchwepheshe kufanele aqinisekise ukuthi imitha ilungiselelwe okokufaka okungu-333mV. Ukusebenzisa i-333mV CT enemitha elindele okokufaka kwe-5A kuzoveza idatha engalungile.

Ingabe i-transformer yamanje idinga umthombo wayo wamandla?

Cha, i-CT ejwayelekile yokwenziwa ayidingi umthombo wamandla wangaphandle. Ivuna amandla ngokuqondile endaweni kazibuthe ye-conductor eyikalayo. Lokhu kwenza ukufakwa kube lula futhi kunciphisa inkimbinkimbi yezintambo. Izinzwa ezisebenzayo, njengamanye amadivayisi we-Hall Effect, zingase zidinge amandla asizayo.