Momwe Mungasankhire Split Core Current Transformer ya Retrofit Application

AWG	Diameter (mu)	Diameter (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

Kuyika kokhala ndi ma conductor angapo olumikizidwa pamodzi kumafuna chidwi chapadera. Zenera la CT liyenera kukhala lalikulu mokwanira kuzungulira mtolo wonse. Thekuphatikiza circumference wa mawaya m'mitolo kulamula osachepera chofunika zenera kukula.

Malangizo Othandizira:Zenera la CT liyenera kukwaniramwapamwamba kuzungulira chingwe kapena busbar. Kukwanira bwino kungapangitse kuyikika kukhala kovuta, pomwe kabowo kakang'ono kopitilira muyeso kumatha kuyambitsa zolakwika. Cholinga chake ndikukwanira bwino popanda malo opanda kanthu.

Kusankha Maximum Current Rating

Pambuyo potsimikizira kukwanira kwa thupi, chotsatira ndikusankha mulingo woyenera wa amperage. Chiyerekezo choyambirira cha CT chiyenera kukhala chachikulu kuposa chomwe chikuyembekezeka pakali pano pagawo loyang'aniridwa. Chiyembekezo ichi sichake chaulendo wa wophwanya dera koma kuchuluka kwamphamvu kopitilira muyeso komwe kungakoke.

Katswiri ayenera kuwerengera kuchuluka kwa magetsi komwe kungachitike m'tsogolomu. Mchitidwewu umalepheretsa kufunikira kosinthira ndalama zambiri pambuyo pake.

Mchitidwe wabwino wamakampani wamba ndikusankha CT yokhala ndi mavoti oyambira omwe ali125%wa katundu wochuluka mosalekeza. 25% yosungira iyi imapereka malire achitetezo pakukulitsa kwamtsogolo ndikulepheretsa CT kukhuta.

Mwachitsanzo, ngati dera likupitirirabe kupitirira 80A, katswiri angawerengere mlingo wocheperako wa CT monga80A * 1.25 = 100A. Pankhaniyi, 100A Split Core Current Transformer ingakhale chisankho choyenera. Kuchepetsa CT kungayambitse kukhudzika kwapakati, zomwe zimapangitsa kuti pakhale kuwerengeka kolakwika komanso kuwonongeka komwe kungachitike. Mosiyana ndi zimenezi, kuchulukitsitsa kwakukulu kungachepetse kulondola pazigawo zotsika zamakono, kotero kupeza bwino ndikofunikira.

Kufananiza Chizindikiro Chotulutsa ndi Meter Yanu

Katswiri akatsimikizira kukula kwa thupi, ntchito yofunika kwambiri ndikuwonetsetsa kuti magetsi amagwirizana. Split Core Current Transformer imagwira ntchito ngati sensa, kutembenuza zamakono zamakono kukhala chizindikiro chotsika. Chizindikiro chotulutsachi chiyenera kufanana ndendende ndi zomwe mita yamagetsi kapena chipangizo chowunikira chapangidwira kuvomereza. Kufanana kolakwika kudzatsogolera ku data yolakwika kapena, nthawi zina, kuwonongeka kwa zida.

Kumvetsetsa Zomwe Zimatuluka CT (5A, 1A, 333mV)

Ma transfoma apano akupezeka ndi ma sign angapo otuluka. Mitundu itatu yodziwika kwambiri yopezeka muzowonjezera ndi 5 Amp (5A), 1 Amp (1A), ndi 333 millivolt (333mV). Iliyonse ili ndi mawonekedwe ake ndipo ndi yoyenera pazochitika zosiyanasiyana.

5A ndi 1A Zotsatira:Izi ndi zotuluka zachikhalidwe. CT imapanga mphamvu yachiwiri yomwe imagwirizana mwachindunji ndi yoyamba. Mwachitsanzo, 100: 5A CT idzatulutsa 5A pa yachiwiri yake pamene 100A ikuyenda kupyolera mwa wotsogolera woyamba. Ngakhale 5A yakhala muyeso wakale, zotuluka za 1A zikutchuka pakukhazikitsa kwatsopano.

⚠️ Chenjezo Lovuta Kwambiri la Chitetezo:CT yokhala ndi 5A kapena 1A yotulutsa ndi gwero lapano. Dera lake lachiwiri liyeneraayikusiyidwa kotsegula pomwe woyendetsa woyamba ali ndi mphamvu. Yachiwiri yotseguka imatha kupangama voltages okwera kwambiri, oopsa(nthawi zambirizikwi za volts), kubweretsa chiwopsezo chowopsa. Mkhalidwewu ukhozanso kupangitsa kuti pakatikati pa CT pawonjezeke ndikulephera, zomwe zitha kuwononga CT ndikuwononga zida zolumikizidwa. Nthawi zonse onetsetsani kuti materminal afupikitsidwa kapena kulumikizidwa ku mita musanapatse mphamvu magawo oyambira.

Thekusankha pakati pa 1A ndi 5A zotsatiranthawi zambiri zimadalira mtunda wa mita ndi ndondomeko ya polojekiti.

Kutulutsa kwa 333mV:Mtundu uwu wa CT umapanga chizindikiro chochepa chamagetsi. Ma CT awa ndi otetezeka chifukwa ali ndi chopinga cholemetsa chomwe chimasintha mphamvu yachiwiri kukhala voteji. Kapangidwe kameneka kamalepheretsa kuopsa kwamphamvu kwamagetsi komwe kumalumikizidwa ndi kutseguka kwa 1A kapena 5A CT. Chizindikiro cha 333mV ndi muyezo wamba wamamita amakono amagetsi a digito.

Mtundu wina wa sensor, ndiZolemba za Rogowski, imapanganso kutulutsa kwa millivolt-level. Komabe, pamafunika chophatikiza chosiyana kuti chigwire ntchito moyenera. Ma coil a Rogowski ndi osinthika komanso abwino kuyeza mafunde okwera kwambiri kapena pamagwiritsidwe okhala ndi ma frequency osiyanasiyana, koma nthawi zambiri sali oyenera kunyamula.pa 20a.

Kutsimikizira Zofunikira za Meter Yanu

Lamulo lofunikira kwambiri pakusankha kwa CT ndikuti zotulutsa za CT ziyenera kufanana ndi zomwe mita. Mamita opangidwa kuti alowetse 333mV sangathe kuwerenga chizindikiro cha 5A, ndi mosemphanitsa. Njira yotsimikizirayi imaphatikizapo kuyang'ana ma data ndi kumvetsetsa lingaliro la katundu.

Choyamba, katswiri ayenera kudziwa mtundu wa zolowetsa zomwe watchulidwa ndi wopanga mita. Izi nthawi zambiri zimasindikizidwa pa lebulo la chipangizocho kapena kufotokozedwa mwatsatanetsatane m'mabuku ake oyika. Kulowetsako kudzanenedwa momveka bwino ngati 5A, 1A, 333mV, kapena mtengo wina wake.

Chachiwiri, katswiri ayenera kuganizira zonsekatundupa CT. Burden ndi katundu wonse wolumikizidwa ku sekondale ya CT, yoyesedwa mu Volt-Amps (VA) kapena Ohms (Ω). Katunduyu akuphatikizapo:

• The Impedans mkati mita palokha.
• Kukana kwa mawaya otsogolera omwe akuyenda kuchokera ku CT kupita ku mita.
• Kulepheretsa kwa zida zina zilizonse zolumikizidwa.

CT iliyonse ili ndi apazipita kulemedwa mlingo(mwachitsanzo, 1VA, 2.5VA, 5VA). Kupitilira muyeso uwu kupangitsa kuti CT isiye kulondola. Monga momwe tebulo ili m'munsili likusonyezera, akulowetsedwa kwa mita kumasiyanasiyanakwambiri ndi mtundu, chomwe chiri chigawo chachikulu chakulemedwa kwathunthu.

Kutsika kochepa kwa mita ya 5A kumapangidwira kuti ikhale yozungulira pafupi-fupi, pamene kulepheretsa kwakukulu kwa mita ya 333mV kumapangidwa kuti athe kuyeza magetsi popanda kujambula kwambiri pakali pano.

Malangizo Othandizira:Nthawi zonse funsani zolemba za wopanga za CT ndi mita. Ambiri opanga amaperekaMatebulo ogwirizanazomwe zimalemba momveka bwino kuti ndi mitundu iti ya CT yomwe imavomerezedwa kuti igwiritsidwe ntchito ndi mita kapena ma inverter enieni. Kuwona zolembedwa izi ndi njira yotsimikizika yotsimikizira kuyika bwino.

Mwachitsanzo, wopanga ma inverter angapereke tchati chosonyeza kuti "Model X" hybrid inverter yake imangogwirizana ndi mita ya "Eastron SDM120CTM" ndi CT yogwirizana nayo. Kuyesa kugwiritsa ntchito CT yosiyana, ngakhale ndi chizindikiro cholondola, kumatha kulepheretsa zitsimikizo kapena kupangitsa kuti dongosolo liwonongeke.

Kusankha Kalasi Yolondola Yolondola pa Ntchito Yanu

Pambuyo poyesa CT ndikufananiza zotulutsa zake, katswiri ayenera kusankha kalasi yoyenera yolondola. Izi zimatanthawuza momwe kutulutsa kwachiwiri kwa CT kumayimira zenizeni zenizeni zamakono. Kusankha kalasi yolondola kumawonetsetsa kuti zomwe zasonkhanitsidwa ndi zodalirika pazolinga zomwe zafunidwa, kaya pamalipiritsa kapena kuyang'anira wamba. Kusankhidwa kosayenera kungayambitse kusagwirizana pazachuma kapena zosankha zolakwika pazantchito.

Kufotokozera Makalasi Olondola a CT

Miyezo yapadziko lonse lapansi, mongaIEC 61869-2, tanthauzirani makalasi olondola a CT. Muyezo uwu umatchula zolakwika zovomerezeka pamaperesenti osiyanasiyana a CT yomwe idavotera pano. Kusiyana kwakukulu kulipo pakati pa makalasi wamba ndi makalasi apadera, okhwima kwambiri.

• Muyezo wa IEC 61869-2 umafotokoza zofunikira pakugwira ntchito pazolakwa zonse zomwe zikuchitika komanso kusamuka kwa gawo.
• Ma Special 'S' class CTs (mwachitsanzo, Class 0.5S) ali ndi malire okhwima olakwika pamiyezo yotsika pano poyerekeza ndi ofanana nawo (mwachitsanzo, Gulu 0.5).
• Mwachitsanzo, pa 5% ya ovotera panopa, Class 0.5 CT akhoza kukhala ndi1.5% zolakwika, pomwe Class 0.5S CT iyenera kukhala mkati mwa 0.75%.

Kulondola kumaphatikizapo zambiri kuposa kukula kwamakono. Zimaphatikizaponsokusamuka kwa gawo, kapena vuto la gawo. Uku ndi kuchedwa kwa nthawi pakati pa mawonekedwe oyambira omwe alipo ndi mawonekedwe achiwiri otuluka. Ngakhale kulakwitsa kwa gawo laling'ono kumatha kukhudza kuwerengera mphamvu.

Nthawi Yoyenera Kusankha Billing-Grade vs. Monitoring-Giredi Kulondola

Kugwiritsa ntchito kumatsimikizira kulondola kofunikira. Ma CT nthawi zambiri amagawika m'magulu awiri: kalasi yolipira ndi yowunikira.

Billing-gradeMa CTs (mwachitsanzo, Kalasi 0.5, 0.5S, 0.2) ndi ofunikira pakugwiritsa ntchito ndalama. Kampani kapena eni nyumba akalipira wobwereketsa kuti agwiritse ntchito mphamvu, muyeso uyenera kukhala wolondola kwambiri. Akulakwitsa kwa gawo laling'ono kungayambitse zolakwika zazikulu pakuyezera mphamvu, makamaka mu machitidwe omwe ali ndi mphamvu yochepa. Izi zikutanthawuza mwachindunji ku malipiro olakwika a zachuma.

Miyezo yolakwika ya mphamvu kuchokera ku cholakwika cha gawo imathanso kuyambitsa mavuto kupitilira kulipira. M'magawo atatu, zimatha kuyambitsakatundu wosayenerera ndi kupsinjika kwa zida. Zitha kupangitsa kuti maulumikizidwe oteteza asagwire ntchito, kupanga ziwopsezo zachitetezo.

Monitoring-girediCTs (mwachitsanzo, Class 1.0 ndi pamwamba) ndi oyenera kasamalidwe wamba mphamvu. Akatswiri amawagwiritsa ntchito potsata momwe zida zimagwirira ntchito, kuzindikira momwe amanyamulira, kapena kugawa ndalama mkati. Kwa ntchito izi, kutsika pang'ono kulondola ndikovomerezeka. Kusankha Split Core yoyeneraTransformer Yamakonozimatsimikizira kukhulupirika kwa datayo kumagwirizana ndi ndalama za polojekitiyi komanso momwe ntchito ikugwirira ntchito.

Kutsimikizira Split Core Current Transformer ya Chitetezo ndi Chilengedwe

Macheke omaliza a katswiri amaphatikizapo kutsimikizira ziphaso zachitetezo ndikuwunika malo oyikapo. Masitepe awa amatsimikizira osankhidwaGawani Core Current Transformerimagwira ntchito modalirika komanso motetezeka kwa moyo wake wonse wautumiki. Kunyalanyaza zotsimikizira izi kungayambitse kulephera msanga, ngozi zachitetezo, komanso kusatsata malamulo achigawo.

Kuyang'ana UL, CE, ndi Zitsimikizo Zina

Zitsimikizo zachitetezo ndizosakambirana. Amatsimikizira kuti chinthu chinayesedwa ndi bungwe lodziimira kuti likwaniritse zofunikira zenizeni za chitetezo ndi machitidwe. Ku North America, katswiri ayenera kuyang'ana chizindikiro cha UL kapena ETL. Ku Europe, chizindikiro cha CE ndichofunikira.

Chizindikiro cha CE chikuwonetsa kutsata malangizo a European Union, mongaLow Voltage Directive. Kuti agwiritse ntchito chizindikirochi, wopanga ayenera:

1. Chitani kafukufuku wowopsa kuti muwone ndikuchepetsa zoopsa zomwe zingachitike.
2. Chitani mayeso ogwirizana molingana ndi miyezo yogwirizana.
3. Perekani mwachizoloweziDeclaration of Conformity, chikalata chazamalamulo chotengera kutsata kwa malonda.
4. Sungani zolemba zamaluso, kuphatikizapo kusanthula zoopsa ndi malangizo ogwiritsira ntchito.

Onetsetsani nthawi zonse kuti ziphaso ndi zowona ndipo zikugwirizana ndi mtundu womwe mukugulidwa. Kusamala kumeneku kumateteza zida ndi antchito.

Kuyang'ana Malo Oyika

Malo owoneka bwino amakhudza kwambiri moyo wautali wa CT komanso kulondola kwake. Katswiri ayenera kuyesa zinthu zitatu zofunika: kutentha, chinyezi, ndi zowononga.

Kutentha kwa Ntchito:CT iliyonse imakhala ndi kutentha kwake komwe kumagwiritsidwa ntchito. Zitsanzo zina zimagwira ntchito kuchokera-30 ° C mpaka 55 ° C, pamene ena, monga masensa ena a Hall Effect, amatha kugwira-40°C mpaka +85°C. Katswiri ayenera kusankha chipangizo chomwe chidavotera kutentha kwa malo oyikapo, kuyambira usiku wozizira kwambiri mpaka tsiku lachilimwe lotentha kwambiri.

Chitetezo cha Chinyezi ndi Kulowa (IP): Kuchuluka kwa chinyezi komanso kukhudzana mwachindunji ndi madzindi ziwopsezo zazikulu.Chinyezi chikhoza kusokoneza insulation, kuwononga zitsulo, ndi kuchititsa kuti magetsi aziwonongeka. TheIngress Protection (IP) mlingozimasonyeza kukana kwa chipangizo ku fumbi ndi madzi.

Mulingo wa IP65 nthawi zambiri umakhala wokwanira m'mipanda yongoyerekeza. Komabe, kukhazikitsa panja kungafune IP67 kuti atetezedwe ku kumizidwa. Kwa malo ochapira movutikira, monga pokonza chakudya, ndiMtengo wa IP69KSplit Core Current Transformer ndiyofunikira.

Corrosive Atmospheres:Malo omwe ali pafupi ndi gombe kapena mafakitale amatha kukhala ndi mchere kapena mankhwala mumlengalenga. Zowononga izi zimathandizira kuwonongeka kwa nyumba za CT ndi zida zamkati. M'malo oterowo, katswiri ayenera kusankha CT yokhala ndi zida zolimba, zosachita dzimbiri komanso zotsekera zomata.

---

Katswiri amatsimikizira kubweza bwino potsatira mndandanda womaliza. Izi zikutsimikizira Split Core Current Transformer imakwaniritsa zosowa zonse za polojekiti.

• Kukula Kwazenera:Imagwirizana ndi kondakitala.
• Amperage:Kupitilira kuchuluka kwa dera.
• Chizindikiro Chotulutsa:Zimagwirizana ndi zomwe mita.
• Kalasi Yolondola:Imagwirizana ndi ntchito (malipiro motsutsana ndi kuyang'anira).

Katswiri ayenera kutsimikizira nthawi zonse kuti Split Core Current Transformer yosankhidwa ikugwirizana kwathunthu ndi zida zoyezera. Kuyika patsogolo zitsanzo zokhala ndi ziphaso zoyenera zachitetezo kuderali kumateteza onse ogwira ntchito ndi zida.

FAQ

Kodi chimachitika ndi chiyani ngati katswiri ayika CT kumbuyo?

Katswiri woyika CT chammbuyo amatembenuza polarity yomwe ilipo. Izi zimapangitsa mita kuwonetsa kuwerengera mphamvu kolakwika. Pamiyezo yolondola, muvi kapena chizindikiro panyumba ya CT iyenera kuloza komwe kukuyenda komweko, kupita komwe kuli katundu.

Kodi katswiri angagwiritse ntchito CT imodzi yayikulu pamakondakitala angapo?

Inde, katswiri amatha kudutsa ma conductor angapo kudzera pa CT imodzi. CT idzayesa ukonde (vector sum) wa mafunde. Njirayi imagwira ntchito poyang'anira mphamvu zonse. Sikoyenera kuyeza kagwiritsidwe ntchito ka dera.

Chifukwa chiyani 333mV CT yanga ikuwerenga molakwika?

Kuwerenga kolakwika nthawi zambiri kumabwera chifukwa cha kusagwirizana pakati pa CT ndi mita. Katswiri ayenera kutsimikizira kuti mita yakonzedwa kuti ikhale yolowera 333mV. Kugwiritsa ntchito 333mV CT yokhala ndi mita kuyembekezera kulowetsedwa kwa 5A kudzatulutsa deta yolakwika.

Kodi thiransifoma yamakono ikufunika mphamvu yakeyake?

Ayi, CT yokhazikika sifunikira gwero lamphamvu lakunja. Imakolola mphamvu mwachindunji kuchokera ku mphamvu ya maginito ya kondakitala yomwe imayesa. Izi zimathandizira kukhazikitsa ndikuchepetsa zovuta zamawaya. Masensa omwe amagwira ntchito, monga zida zina za Hall Effect, angafunike mphamvu zothandizira.