Uthelekiso olusebenzayo lweZiguquleli zangoku zoMlinganiselo vs uKhuseleko

Ukhuseleko CT UkuchanekaUkuchaneka kwe-CT yokukhusela akukho malunga nokuhlawula ngokuchanekileyo kodwa malunga nokusebenza okuqikelelweyo ngexesha lesiphoso. Ukuchaneka kwayo kuchazwa "yimpazamo edibeneyo" kwi-multiple ecacisiweyo yokulinganisa kwayo okwangoku. Iklasi yokhuseleko eqhelekileyo5P10.Olu bizo lwahlulahlulwe ngolu hlobo lulandelayo:

• 5: Impazamo edibeneyo ayiyi kudlula i-5% kumda wokuchaneka.
• P: Le leta iyichaza njengeklasi yoKhuselo lweCT.
• 10: Le yi-Accuracy Limit Factor (ALF). Kuthetha ukuba i-CT iya kugcina ukuchaneka kwayo okuchaziweyo ukuya kumaxesha angama-10 alinganiswe ngokuphambili.

Ngamafutshane, i-5P10 CT iqinisekisa ukuba xa i-primary current ingamaxesha angama-10 ukulinganisa kwayo okuqhelekileyo, isignali ethunyelwe kwi-relay isengaphakathi kwe-5% yexabiso elifanelekileyo, ukuqinisekisa ukuba i-relay yenza isigqibo sohambo oluchanekileyo.

Umthwalo kunye ne-VA Rating

Umthwalongumthwalo opheleleyo wombane oqhagamshelwe kwiitheminali eziziisekondari ze-CT, ezilinganiswa ngeVolt-Amperes (VA) okanye ohms (Ω). Zonke izixhobo kunye nocingo oluqhagamshelwe kwi-CT lunegalelo kulo mthwalo. Ukugqithiswa komthwalo ohleliweyo we-CT kuya kuthoba ukuchaneka kwayo.

Umthwalo opheleleyo nguIsixa se-impedances yawo onke amacandelokwisekethe yesibini:

• I-CT's eyakhe inqanaba lesibini lokunganyangeki.
• Ukuxhatshazwa kweengcingo ezikhokelayo ezidibanisa i-CT kwisixhobo.
• I-impedance yangaphakathi yesixhobo esixhunyiwe (imitha okanye i-relay).

Ukubala Umthwalo Opheleleyo:Injineli inokubala umthwalo opheleleyo isebenzisa ifomula:Umthwalo opheleleyo (Ω) = CT Ukuvala i-R (Ω) + ucingo R (Ω) + Isixhobo Z (Ω)Umzekelo, ukuba i-CT's secondary winding resistance yi-0.08 Ω, iingcingo eziqhagamshelayo zine-0.3 Ω yokumelana, kwaye i-relay ine-impedance ye-0.02 Ω, umthwalo wesekethe iyonke yi-0.4 Ω. Eli xabiso kufuneka libe ngaphantsi komthwalo ohlelwe yi-CT ukuze isebenze ngokuchanekileyo.

Ukulinganisa i-CTs ngokuqhelekileyo inemilinganiselo ephantsi ye-VA (umzekelo, i-2.5 VA, i-5 VA) kuba idibanisa kwi-high-impedance, izixhobo zokusetyenziswa kweemitha eziphantsi kumgama omfutshane. I-CTs yoKhuseleko ifuna iireyithingi eziphezulu kakhulu ze-VA (umzekelo, i-15 VA, i-30 VA) ngenxa yokuba kufuneka zinike amandla awoneleyo okusebenzisa i-impedance ephantsi, iikhoyili zokusetyenziswa okuphezulu kwe-relay yokukhusela, ngokuphindaphindiweyo kwiintambo ezide kakhulu. Ukulinganisa ngokungafanelekanga ukulinganiswa komthwalo we-CT kumthwalo wesekethe wangempela ngumthombo oqhelekileyo wephutha kwiinkqubo zombini zokulinganisa kunye nokukhusela.

Ukuqonda i-Knee Point Voltage

I-Voltge Point ye-Knee Point (KPV) yiparameter ebaluleke kakhulu kuphela kukhuseleko lwe-CTs. Ichaza umda ophezulu woluhlu lokusebenza oluluncedo lwe-CT phambi kokuba umbindi wayo uqalise ukugcwala. Eli xabiso liyimfuneko ekuqinisekiseni ukuba i-relay yokukhusela ifumana isignali ethembekileyo ngexesha lephutha eliphezulu.

Iinjineli zimisela i-KPV ukusuka kwigophe lovuselelo le-CT, elicwangcisa amandla ombane esibini anika umdla ngokuchasene nomsinga wesibini onika umdla. "Idolo" linqaku kweli jiko apho iipropati zemagneti ezingundoqo zitshintsha kakhulu.

IIEEE C57.13 umgangathoinikeza inkcazo echanekileyo yale ngongoma. Kwi-CT ye-non-gapped core, i-knee point apho i-tangent kwi-curve yenza i-angle ye-45-degree kunye ne-axis ethe tye. Kwi-CT engundoqo egapped, le engile yi-30 degrees. Eli nqaku lithile liphawula ukuqala kokugcwala.

Xa i-CT isebenza ngaphantsi kwe-voltage point point edolweni, ingundoqo yayo ikwimeko yemagnethi yomgca. Oku kuvumela ukuba ivelise ngokuchanekileyo i-fault current ye-relay edibeneyo. Nangona kunjalo, xa i-voltage yesibini idlula i-KPV, i-core ingena kwi-saturation. I-Saturation, ehlala iqhutywa yimisinga emikhulu ye-AC kunye ne-DC offsets ngexesha lempazamo, ibangela i-CT's.magnetizing impedance ukuhla kakhulu. I-transformer ayinakukwazi ukubonisa ngokunyanisekileyo i-primary current ukuya kwicala layo lesibini.

Ubudlelwane phakathi kwe-KPV kunye nokuthembeka kokhuseleko luthe ngqo kwaye lubalulekile:

• Ngaphantsi kwinqanaba ledolo:I-core CT isebenza ngokulandelelana. Inika ukubonakaliswa ngokuchanekileyo kwesiphoso sangoku kwi-relay yokukhusela.
• Ngaphezulu kwenqaku ledolo:Undoqo uyahlutha. Oku kukhokelela ekunyukeni okukhulu kwe-magnetizing yangoku kunye nokusebenza okungahambiyo, oku kuthetha ukuba i-CT ayisabonakali ngokuchanekileyo impazamo yangoku.
• Umsebenzi wokudlulisa:Iireyidi ezikhuselayo zifuna umqondiso ochanekileyo ukuze zisebenze ngokuchanekileyo. Ukuba i-CT ihlutha ngaphambi kokuba i-relay ikwazi ukwenza isigqibo, i-relay inokusilela ekuboneni ubukhulu bokwenene bempazamo, ekhokelela ekuhambeni kokulibaziseka okanye ukungaphumeleli ngokupheleleyo ekusebenzeni.
• Ukhuseleko lweNkqubo:Ngoko ke, i-voltage ye-knee point voltage ye-CT kufuneka ibe phezulu ngokwaneleyo kunomthamo ophezulu wesibini olindelekileyo ngexesha lempazamo. Oku kuqinisekisa ukuba i-relay ifumana umqondiso othembekileyo ukukhusela izixhobo ezibizayo.

Iinjineli zibala i-KPV efunekayo ukuqinisekisa ukuba i-CT ihlala ingenasiphelo phantsi kweemeko ezimbi kakhulu. Ifomula eyenziwe lula yolu balo yile:

I-KPV efunekayo ≥ Ukuba × (Rct + Rb)

Apho:

• If= Ubuninzi bempazamo yangoku (Amps)
• Rct= CT uxhathiso lwesibini lomoya (Ohms)
• Rb= Umthwalo opheleleyo we-relay, iingcingo, kunye noqhagamshelo (Ohms)

Ekugqibeleni, i-Voltage ye-Knee Point isebenza njengesalathisi esiphambili se-CT yokukhusela ukukwazi ukwenza umsebenzi wayo wokhuseleko phantsi koxinzelelo olukhulu lombane.

Ukucacisa iiKhowuwudi zeTelayithi yeTransform yangoku

I-nameplate yangoku yeTransformer iqulethe ikhowudi edibeneyo echaza amandla ayo okusebenza. Olu bizo lwealphanumeric lulwimi olufutshane lweenjineli, luchaza ukuchaneka kwecandelo, ukusetyenziswa kunye nemida yokusebenza. Ukuqonda ezi khowudi kubalulekile ekukhetheni isixhobo esichanekileyo.

Ukutolika iiKlasi ze-CT zoMlinganiselo (umz., 0.2, 0.5S, 1)

Iiklasi ze-CT zoMlinganiselo zichazwa ngenani elimele eyona mpazamo yepesenti evumelekileyo kwi-rated current. Inani elincinane libonisa iqondo eliphezulu lokuchaneka.

• Iklasi 1:Ifanelekile ukulinganisa kwepaneli ngokubanzi apho ukuchaneka okuphezulu kungabalulekanga.
• Iklasi 0.5:Isetyenziselwa izicelo zentlawulo yentengiso kunye neshishini.
• Udidi 0.2:Kuyafuneka kwimitha yengeniso echaneke kakhulu.

Ezinye iiklasi ziquka unobumba 'S'. Igama elithi 'S' kwiiklasi ze-CT zomlinganiselo we-IEC, ezifana no-0.2S no-0.5S, libonisa ukuchaneka okuphezulu. Olu lwahlulo lulodwa lusetyenziswa ngokubanzi kuluhlu lweentlawulo zemitha apho imilinganiselo echanekileyo ibaluleke kakhulu, ngakumbi kwisiphelo esisezantsi soluhlu lwangoku.

Ukutolika uKhuseleko lweeKlasi zeCT (umzekelo, 5P10, 10P20)

Iiklasi ze-CT zoKhuseleko zisebenzisa ikhowudi yamacandelo amathathu echaza ukuziphatha kwabo ngexesha lesiphoso. Umzekelo oqhelekileyo ngu5P10.

Ukwaphula iKhowudi ye-5P10:

• 5: Eli nani lokuqala yimpazamo enkulu ehlanganisiweyo kwipesenti (5%) kumda wokuchaneka.
• P: Unobumba 'P' kuhlelo olufana no-5P10 uthetha 'Udidi loKhuselo'. Oku kubonisa ukuba i-CT yenzelwe ngokukodwa ukuthunyelwa kwezicelo ezikhuselweyo kunokulinganisa okuchanekileyo.
• 10: Le nombolo yokugqibela yi-Accuracy Limit Factor (ALF). Kuthetha ukuba i-CT iya kugcina ukuchaneka kwayo okucacisiweyo ukuya kuthi ga kwi-fault current ephindwe ka-10 i-nominal rating yayo.

Ngokufanayo, a10P20iklasi ye-CT inomda wempazamo edibeneyo ye-10% kunye ne-Accuracy Limit Factor of20. Kwigama elifana ne-10P20, inani '20' libonisa ukuchaneka komda. Lo mbandela ubonisa ukuba impazamo ye-transformer iya kuhlala ngaphakathi kwemida eyamkelekileyo xa ikhoyo ngoku ngamaxesha angama-20 ixabiso layo elilinganisiweyo. Esi sikhundla sibalulekile ekuqinisekiseni ukuba iireyiyidi ezikhuselayo zisebenza ngokuchanekileyo ngexesha leemeko ezimandundu zesekethe emfutshane.

Isikhokelo seSicelo: Ukutshatisa i-CT noMsebenzi

Ukukhetha i-Transformer yangoku efanelekileyo ayingombandela wokukhetha kodwa iyimfuneko echazwe sisicelo. I-CT yokulinganisa inika ukuchaneka okufunekayo kwiintengiselwano zemali, ngelixa i-CT yokukhusela inikezela ukuthembeka okufunekayo kukhuseleko lwe-asethi. Ukuqonda apho ufaka isicelo sohlobo ngalunye kubalulekile kwisandi soyilo lwenkqubo yombane kunye nokusebenza.

Ukusetyenziswa nini i-Measurement CT

Iinjineli kufuneka zisebenzise i-CT yokulinganisa kuyo nayiphi na isicelo apho ukulandelela ngokuchanekileyo ukusetyenziswa kombane kuyinjongo ephambili. Ezi zixhobo zisisiseko sentlawulo echanekileyo kunye nolawulo lwamandla. Uyilo lwabo lubeka phambili ukuchaneka okuphezulu phantsi kweemeko eziqhelekileyo zomthwalo.

Izicelo eziphambili zokulinganisa iiCTs ziquka:

• Ingeniso kunye neTharifi yokulinganisa: Izinto eziluncedo zisebenzisa ii-CTs ezichaneke kakhulu (umzekelo, iKlasi ye-0.2S, i-0.5S) yokuhlawulisa abathengi beendawo zokuhlala, zorhwebo, kunye namashishini. Ukuchaneka kuqinisekisa iintengiselwano zemali ezifanelekileyo nezichanekileyo.
• IiNkqubo zoLawulo lwaMandla (EMS): Amaziko asebenzisa ezi CTs ukujonga ukusetyenziswa kwamandla kuwo onke amasebe okanye izixhobo zokusebenza. Le datha inceda ukuchonga ukungasebenzi kunye nokwandisa ukusetyenziswa kwamandla.
• Uhlalutyo lomgangatho wamandla: Abahlalutyi bomgangatho wamandla badinga amagalelo achanekileyo ukuxilonga imiba efana ne-harmonics kunye ne-voltage sags. Kule milinganiso, ngakumbi kwiinkqubo zombane ophakathi, ukuphendulwa rhoqo kwesixhobo sokuguqula isixhobo kubalulekile. Abahlalutyi banamhlanje banokufuna idatha ethembekileyoukuya kuthi ga kwi9kHz, ifuna i-frequency-optimized transformers ukuba ibambe i-harmonic spectrum.

Inqaku kuKhetho:Xa ukhetha i-CT yemitha yamandla okanye i-analyzer, izinto ezininzi zibalulekile.

• Ukuhambelana kwemveliso: Imveliso ye-CT (umz., 333mV, 5A) kufuneka ihambelane neemfuno zegalelo lemitha.
• Ubungakanani bomthwalo: Uluhlu lwe-amperage ye-CT kufuneka luhambelane nomthwalo olindelekileyo ukugcina ukuchaneka.
• Ukomelela ngokwasemzimbeni: I-CT kufuneka ilingane ngokwasemzimbeni ijikeleze umqhubi. Iikhoyili ze-Flexible Rogowski sisisombululo esisebenzayo kwiibhasi ezinkulu okanye iindawo ezixineneyo.
• Ukuchaneka: Ukuhlawula, ukuchaneka kwe-0.5% okanye okungcono kusemgangathweni. Ukubeka iliso ngokubanzi, i-1% inokwanela.

Usetyenziswa nini i-Protection CT

Iinjineli kufuneka zisebenzise i-CT yokukhusela naphi na apho injongo ephambili kukukhusela abasebenzi kunye nezixhobo kwii-overcurrents kunye neempazamo. Ezi CTs zenzelwe ukuba zihlale zisebenza ngexesha leziganeko ezigqithisileyo zombane, zibonelela ngesignali ethembekileyo kwi-relay yokukhusela.

Izicelo eziqhelekileyo zokukhusela iiCTs ziquka:

• I-Overcurrent kunye ne-Earth Fault Protection: Ezi zibonakaliso ze-CTs zondla kwii-relays (njenge-ANSI Isixhobo 50/51) ezibona iimpazamo zesigaba okanye zomhlaba. Emva koko i-relay ikhubaza i-circuit breaker ukuze yahlukanise impazamo. Kwi-medium-voltage switchgear, usebenzisa ozinikeleyozero-ulandelelwano CTkukhuseleko oluphantsi komhlaba ludla ngokucetyiswa ngaphezulu kodibaniso olushiyekileyo lweIzigaba ezintathu ze-CTs. Uqhagamshelo olushiyekileyo lunokukhokelela kwiihambo zobuxoki ngenxa yokugcwala okungalinganiyo ngexesha lokuqalisa kweemoto okanye iimpazamo zesigaba.
• Ukhuseleko olwahlukileyo: Esi sikimu sikhusela ii-asethi ezinkulu ezifana ne-transformers kunye neejeneretha ngokuthelekisa imisinga engena kwaye ishiya indawo ekhuselweyo. Ifuna iiseti ezihambelanayo zokhuseleko lwe-CTs.Iireyidi zedijithali zangokuinokuhlawulela uxhulumaniso lwe-CT eyahlukeneyo (i-Wye okanye i-Delta) kunye nokutshintshwa kwesigaba ngokusebenzisa izicwangciso zesofthiwe, ezinikezela ukuguquguquka okuphawulekayo kwezi zicwangciso ezinzima.
• ukuKhuselwa komgama: Isetyenziswe kwimigca yokudlulisa, esi sikimu sixhomekeke kwi-CTs yokukhusela ukulinganisa i-impedance kwisiphoso. Ukuzaliswa kwe-CT kunokuphazamisa lo mlinganiso, kubangela ukuba i-relay igwebe ngokungafanelekanga indawo yempazamo. Ngoko ke, i-CT kufuneka yenzelwe ukuphepha ukugcwala ngexesha lomlinganiselo.

Ngokutsho kwe-ANSI C57.13, i-CT esemgangathweni yokukhusela kufuneka imelane nayoAmaxesha angama-20ireyithingi yangoku ngexesha lempazamo. Oku kuqinisekisa ukuba inokuhambisa umqondiso osebenzisekayo kwi-relay xa ibaluleke kakhulu.

Iindleko eziphezulu zoKhetho olungachanekanga

Ukusebenzisa uhlobo olungalunganga lwe-CT yimpazamo ebalulekileyo enemiphumo emibi. Ukwahlukana okusebenzayo phakathi komlinganiselo kunye nokukhusela ii-CTs aziguquguquki, kwaye ukungahambi kakuhle kunokukhokelela kwiziphumo ezinobungozi kunye neendleko.

• Ukusebenzisa iMeasurement CT yoKhuseleko: Le yeyona mpazamo iyingozi. I-CT yokulinganisa yenzelwe ukugcwala kwi-overcurrents ephantsi ukukhusela imitha. Ngexesha lempazamo enkulu, iya kuhlutha ngokukhawuleza. I-CT egcweleyo iya kuphumelela ukuvelisa i-current fault current, kwaye i-relay yokukhusela ayiyi kubona ubukhulu bokwenene besiganeko. Oku kunokukhokelela kuhambo olulibazisekileyo okanye ukusilela ngokupheleleyo ekusebenzeni, okukhokelela kumonakalo omkhulu wezixhobo, umlilo, kunye nomngcipheko kubasebenzi. Ngokomzekelo, i-CT saturation inokubangela ukuba i-transformer differential relay yokukhuselamaloperate, ekhokelela kuhambo olungafunwayo ngexesha lesiphoso sangaphandle.
• Ukusebenzisa i-CT yoKhuseleko kuMlinganiselo: Olu khetho lukhokelela ekungachanekeni kwemali. I-CT yokukhusela ayilungiselelwe ukuchaneka kwimisinga eqhelekileyo yokusebenza. Iklasi yokuchaneka kwayo (umzekelo, i-5P10) iqinisekisa ukusebenza kwi-multiples ephezulu yokulinganisa kwayo, kungekhona ekupheleni komlinganiselo apho uninzi lweenkqubo lusebenza khona. Ukuyisebenzisa xa uhlawula intlawulo bekuya kufana nokulinganisa ukhozo lwesanti ngomthi wokulinganisa. Iintlawulo zamandla ezisisiphumo ziya kuba zingachanekanga, nto leyo ekhokelela kwilahleko yengeniso yezinto ezisetyenziswayo okanye intlawulo engaphezulu kumthengi.

Imeko Yokusilela Okubalulekileyo:Kwizicwangciso zokukhusela umgama, i-CT saturation ibangela ukuba i-relay ilinganise ai-impedance ephezulukunelona xabiso. Oku kunciphisa ngokufanelekileyo ukufikelela kokhuseleko lwe-relay. Isiphoso ekufuneka sicocwe ngoko nangoko sinokubonwa njengesiphoso esithe qelele, esibangela ukuba uhambo lubambezeleke. Oku kulibaziseka kwandisa uxinzelelo kwinkqubo yombane kwaye kwandisa amandla omonakalo obanzi.

Ekugqibeleni, iindleko zokukhetha okungalunganga kwe-CT kuya kude ngaphaya kwexabiso lecandelo ngokwalo. Ibonakalisa ekutshatyalalisweni kwezixhobo, ixesha lokungasebenzi, iirekhodi zemali ezingachanekanga, kunye nokhuseleko olusengozini.

Ngaba i-CT enye ingasebenza zombini uMlinganiselo kunye noKhuseleko?

Ngelixa umlinganiselo kunye nokukhusela ii-CTs zinoyilo olwahlukileyo, iinjineli ngamanye amaxesha zifuna isixhobo esinye ukwenza imisebenzi yomibini. Le mfuno ikhokelele kuphuhliso lweziguquli ezikhethekileyo ezineenjongo ezimbini, kodwa ziza norhwebo oluthile.

I-Dual-Purpose (Class X) CT

Udidi olukhethekileyo, olwaziwa ngokuba yiIklasi X okanye i-PS Class Transformer yangoku, inokusebenza zombini iindima zokulinganisa kunye nokukhusela. Ezi zixhobo azichazwanga ziiklasi zokuchaneka okusemgangathweni njenge-5P10. Endaweni yoko, ukusebenza kwabo kuchazwa yiseti yeeparamitha eziphambili ezisetyenziswa yinjineli ukuqinisekisa ukufaneleka kwazo kwiskimu esithile sokukhusela.

Ngokwemigangatho ye-IEC, ukusebenza koHlelo lwe-X CT kuchazwa ngolu hlobo:

• Ilinganiswe ngokuyintloko yangoku
• Ujika umlinganiselo
• Amandla ombane kwindawo yedolo (KPV)
• Imagnethi yangoku kumbane ochaziweyo
• Uxhathiso lwamajiko okwesibini kuma-75°C

Ezi mpawu zivumela isixhobo ukuba sinikeze ukuchaneka okuphezulu kwemitha phantsi kweemeko eziqhelekileyo ngelixa zibonelela nge-voltage eqikelelweyo yedolo ukuze usebenze ngokuthembekileyo kwi-relay ngexesha leempazamo. Zihlala zisetyenziswa kwiinkqubo zokukhusela ezohlukileyo eziphezulu apho ukusebenza kufuneka kwaziwe ngokuchanekileyo.

Unyino olusebenzayo kunye noRhwebo

Nangona ubukho beKlasi X CTs, ukusebenzisa isixhobo esinye somlinganiselo kunye nokukhusela kudla ngokuphetshwa. Le misebenzi mibini ineemfuno eziphikisanayo.

Umlinganiselo weCT yenzelwe ukugcwala kwangethuba ukukhusela iimitha ezibuthathaka. Aukhuseleko CT yenzelweukuxhathisa ukugcwala ukuqinisekisa ukuba i-relay inokubona impazamo. I-CT eneenjongo ezimbini kufuneka ivumelane phakathi kwezi njongo zimbini ziphikisanayo.

Oku kuvumelana kuthetha ukuba injongo-mbini ye-CT ayinakuwenza nawuphi na umsebenzi kunye neyunithi ezinikeleyo. Uyilo luba nzima kwaye lubiza kakhulu. Kwizicelo ezininzi, ukufaka ii-CTs ezimbini ezihlukeneyo, ezikhethekileyo-enye yemitha kunye neyokukhusela-yisisombululo esinokwethenjelwa kunye neendleko. Le ndlela iqinisekisa ukuba zombiniinkqubo yokuhlawulakwaye inkqubo yokhuseleko isebenza ngaphandle kokulalanisa.

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Ukhetho phakathiumlinganiselo kunye nokukhusela iiCTssisigqibo esicacileyo esisekelwe kukubaluleka kokusebenza. Enye ibonelela ngokuchaneka kwentlawulo, ngelixa enye iqinisekisa ukuthembeka ngexesha lempazamo. Ukukhetha uhlobo oluchanekileyo alunakuxoxisana kukhuseleko lwenkqubo, ukuchaneka kwemali, kunye nobomi obude bezixhobo. Iinjineli kufuneka zihlale zibhekisa kwiinkcukacha ze-CT kunye neemfuno zesixhobo esiqhagamshelweyo.

Auluhlu lokugqibela lokuqinisekisaiquka:

1. Misela Primary yangoku: Tshatisa umlinganiselo we-CT kumthwalo ophezulu.
2. Bala Umthwalo: Yenza isishwankathelo somthwalo wawo onke amacandelo aqhagamshelweyo.
3. Qinisekisa iKlasi yokuchaneka: Khetha iklasi echanekileyo yokulinganisa okanye ukhuseleko.

FAQ

Kwenzeka ntoni ukuba isekethe yesibini ye-CT ishiywe ivuliwe?

Isekethe yesibini evulekileyo yenza amandla ombane aphezulu ayingozi. Umsinga ophambili uba yimagnetizing yangoku, ugcwalise undoqo. Le meko inokutshabalalisa i-CT kwaye ibeka umngcipheko wokutshatyalaliswa okukhulu.

Ukhuseleko Kuqala:Ngalo lonke ixesha sebenzisa iitheminali eziziisekondari ngaphambi kokuba uqhawule nasiphi na isixhobo kwisekethe.

Iinjineli zikhetha njani umlinganiselo ochanekileyo we-CT?

Iinjineli zikhetha umlinganiselo apho isixokelelwano siphezulu sangoku sikufutshane ne-CT's primary rating. Olu khetho luqinisekisa ukuba i-CT isebenza ngaphakathi koluhlu oluchanekileyo. Ngokomzekelo, umthwalo we-90A usebenza kakuhle kunye ne-100: 5A CT.

Kutheni umlinganiselo we-CT ungakhuselekanga ekukhuseleni?

Umlinganiselo we-CT uzalise ngokukhawuleza ngexesha lesiphoso. Ayinakuxela impazamo yokwenyani yangoku kwi-relay ekhuselayo. I-relay ke iyasilela ukukhwela i-breaker, ekhokelela ekutshatyalalisweni kwezixhobo kunye neengozi ezinzima zokhuseleko.

Ngaba iCT enye ingabonelela ngeemitha kunye nokhuseleko?

I-Special Class X CTs inokusebenza zombini iindima, kodwa ukuyila kwabo kukuhambelana. Ukhuseleko oluphezulu kunye nokuchaneka, iinjineli zihlala zifakela ii-CTs ezimbini ezihlukeneyo, ezinikezelweyo-enye yemitha kunye neyokukhusela.