Indlela yokumisa umthamo we-transformer, uchwepheshe kagesi oneminyaka eyishumi uyakukutshela le mithetho!

Uma ufaka isicelo ehhovisi lokunikezwa kwamandla kagesi, kufanele ugcwalise amandla asebenzayo okudingeka uwasebenzise, ​​okungukuthi, mangaki ama-kW adingekayo. Uma ukusetshenziswa kwamandla okuphelele kwesakhiwo kubalwa ukuthi kungama-4500kW, ngenani elikhulu kangaka, ibhodi lamandla lizodinga isinxephezelo samandla asebenzayo. Cabanga ukuthi amandla akho akhokhelwayo angaphezulu kuka-0.9. Amandla abonakalayo azodinga u-4500÷0.9=5000kVA, bese ucabanga ngesilinganiso esithile somthwalo kanye nemininingwane ye-transformer, ngiyesaba ukuthi i-transformer encane engu-5600kVA. Vele, lokhu kubalwa nje, ekusetshenzisweni kwangempela, kusadingeka ubone umthwalo wakho ngesilinganiso sesikhathi esifanayo nezinye izinto okufanele uzicabangele.

Mayelana nokukhetha umthamo we-transformer, kunemithetho elandelayo okufanele uyibhekisele kuyo!

Njengoba unikezwe amandla e-transformer, thola ugesi wayo olinganiswe ohlangothini lwe-voltage grade

Incazelo: Ifanele noma yiliphi izinga le-voltage.

Ifomula: umthamo ohlukaniswe yi-voltage, ophindwe ngesithupha ohlukaniswe ngeshumi.

Ucwaningo lwesigameko:

Amandla abonakalayo I= amandla abonakalayo S/1.732 * 10KV=1000KVA/1.732 * 10KV=57.736A

Kulinganiselwa ukuthi I=1000KVA/10KV * 6/10=60A

Umthamo we-transformer owaziwayo, ukubalwa okusheshayo kokuvikelwa okuyinhloko nokwesibili kuhlanganisa inani lamanje

I-fuse ye-transformer high voltage, ukuqhathaniswa kwe-voltage yomthamo.

Nge-fuse ye-voltage ephansi eguquguqukayo, umthamo uphindwe ngo-9 uhlukaniswe ngo-5

Linganisa ugesi wesibili we-transformer yamandla bese ubala umthamo wayo womthwalo

I-voltage yesibili eguquguqukayo yokusabalalisa eyaziwayo, ama-kilowatts wamanje alinganisiwe.

I-voltage class 400 volts, i-ampere eyodwa 0.6 kilowatts.

Isilinganiso se-voltage: ama-volts angu-3,000, i-1 amp engu-4.5 kilowatts.

I-voltage class 6,000 volts, i-amp integer eyodwa eyisishiyagalolunye kilowatts.

Isigaba se-voltage esingu-10 kv, i-amp engu-1 engu-15 kW.

Izinga le-voltage lingu-35,000, i-1 amp engu-55 kilowatts.

4. Njengoba unikezwe amandla e-transformer, thola ugesi olinganisiwe ohlangothini lwayo lwebanga le-voltage

I-coefficient evamile ye-voltage, i-coefficient yokuphindaphinda kwe-capacitive yamanje,

Ilinganiswe ngama-volts angu-400, i-coefficient engu-1.44,

I-voltage ekalwe ngama-volts angu-6000, i-coefficient zero 096,

Ilinganiswe ngama-volts ayi-10,000, i-coefficient ingu-0.6 kuphela.

Qaphela: ugesi olinganisiwe ohlangothini lwebanga le-voltage ungatholakala ngokuphindaphinda umthamo we-transformer ngqo nge-coefficient ehambisanayo.

Khetha inani lamanje lokuncibilika kwama-fuse ayinhloko nawesibili ngokuya ngomthamo olinganisiwe kanye ne-voltage ye-transformer

Ukugeleza kokuncibilika kuzo zombili izinhlangothi zokusabalalisa kubalwa kalula ngokuya ngomthamo,

Iyunithi yomthamo yi-kilovolt ampere kanti iyunithi ye-voltage yi-kilovolt.

Umthamo we-voltage ephezulu uhlukaniswe yi-voltage, i-voltage ephansi iphindwe ngo-1.8,

Iyunithi ye-ampere yamanje iyatholakala, bese isuswa noma ingezwe ngebanga.

Ucwaningo lwesigameko:

Umthamo olinganiselwe we-transformer yamandla enezigaba ezintathu ngu-315KVA, i-voltage elinganiselwe ye-high end ingu-6KV, kanti i-voltage elinganiselwe ye-low end ingu-400V;

Umthamo wamandla oncibilikayo ohlangothini lomfutho ophezulu ngu-(315÷6) A= 52.5a; Umthamo wamandla oncibilikayo ohlangothini oluphansi ngu-(315×1.8) A=567A

Qaphela: ukukhetha kwencazelo yefuse kuzonqunywa umehluko phakathi kwenani elibalwe kanye negeyiji yamanje yokuncibilika.

Khetha inani lamanje elincibilikisiwe lama-fuse ayinhloko nawesibili ngokuya ngolamanje olinganiselwe we-transformer

Ngokugeleza kokuncibilika kuzo zombili izinhlangothi ze-transformer, bala ugesi olinganiselwe izikhathi eziningana,

Inani lohlangothi olunomfutho ophezulu likhulu, futhi inani liyahlukahluka ngomthamo ohlukile.

Umthamo ofinyelela ku-100, kabili kuya kathathu inani lamanje,

Uma ingaphezu kwekhulu, yehliswa ngamabili ibe yinye nengxenye,

I-voltage ephezulu encane icacisiwe futhi ayikwazi ukuba ngaphansi kwama-amps amathathu.

Ukucindezela okuphansi kulingana nenani elilinganisiwe kungakhathaliseki ukuthi lingakanani inani levolumu.

7 Izidingo zokufakwa kwama-transformer okusabalalisa amandla

Okungenani amamitha amabili nesigamu ukusuka phansi, kunezithiyo ezifakiwe phansi,

Isithiyo okungenani singamamitha angu-1.8 ukuphakama, okushiya iphuzu lomdlalo lesishiyagalombili,

Uma umnotho uvuma, kungcono ukusebenzisa uhlobo lwebhokisi.

Akufanele ibekwe endaweni evulekile ngaphandle kokuthi isetshenziswe okwesikhashana.

Ukufakwa endlini kufanele kungene umoya, futhi iziteshi ezizungezile kufanele zifaneleke.

8 Ikhwalithi ye-voltage yokunikezela yama-transformer okusabalalisa

Kuphela uma i-voltage yokuphakelwa iqinisekisiwe, lapho imishini ingasebenza khona ngokujwayelekile

Ukuphambuka okuphezulu nokuphansi kucacisiwe. I-voltage ihlukile.

I-voltage phakathi kwemigqa ingu-plus noma u-minus seven, u-minus ten plus seven uyisigaba,

Uma izidingo zikhethekile kakhulu, amaqembu okuphakelwa kanye nesidingo kufanele axoxe ngawo.

Isixazululo:

Ohlelweni lokuphakelwa kwamandla oluphansi lwaseShayina, i-voltage yomugqa ingu-380V, kanti ukuphambuka okuvumelekile kungu-± 7%, okungukuthi ngu-353.4 ~ 406.6V; I-voltage yesigaba ingu-220V, kanti ukuphambuka okuvumelekile kungu--10% ~ + 7%, okungukuthi 198 ~ 235.4V.

Ukutholwa kokugoba kokufakwa kokufakwa komshini wokuguqula

Qinisekisa ukusebenza okuphephile kokuguqulwa futhi uhlole izingozi ezifihliwe ngokulinganisa ukuvikela.

Sebenzisa imitha ye-megohm ukukala, khetha imitha ngokuya nge-voltage.

Ngaphezu kwezintathu, ezinhlanu, ezimbili, ezinhlanu, kanye nenkulungwane engaphansi kweshumi.

Isiphelo se-E sethuluzi kufanele sixhunywe phansi, futhi isiphelo se-G kufanele sengezwe uma kungcoliswa kakhulu.

Ukugoqa okungalinganiswanga kanye nezingxenye, isisekelo esithembekile ukuqinisekisa ukuphepha.

Isivinini sokujikeleza ngesandla 120, ngemva kokukhipha isivivinyo bese ususa ucingo.

Qaphela: kuma-transformer angu-35KV nangaphezulu kufanele kusetshenziswe i-megohmmeter engu-2500V; Kuma-transformer afinyelela ku-10KV futhi afaka phakathi, kufanele kusetshenziswe i-megohmmeter engu-1000V, i-L end ixhunywe ekugoqeni kwe-transformer, i-E end isekelwe phansi.

Ukusebenza okufanayo kwama-transformer amabili

Ama-transformer amabili ahambisanayo, izimo ezine okufanele zilungiswe;

Amaqembu ezintambo kufanele afane, kufanele kube nesilinganiso esifanayo se-transformer;

I-voltage ye-impedance kufanele ihambisane, ixhunywe ngokulandelana kwesigaba;

Umehluko womthamo akufanele ube mkhulu, kungcono ungadluli ku-three to one.

11 I-fuse ye-transformer yokusabalalisa iphukile

Uma i-fuse yokucindezela okuphezulu iphukile, izizathu eziyisithupha zokwahlulela.

Incazelo yefuse incane; Umonakalo wekhwalithi embi kunzima ukuwuthwala;

I-lead short circuit enamandla aphezulu; Ukuwohloka kokufakwa kokushisa kwangaphakathi;

Umonakalo obangelwa ukushaywa umbani; Ukuqhekeka noma ukuphuka kwekheyiji.

Uma i-fuse yokucindezela okuphansi iphukile, izizathu ezinhlanu zokwahlulela.

Incazelo yefuse incane; Umonakalo wekhwalithi embi kunzima ukuwuthwala;

Umthwalo owedlulele isikhathi eside; Ukuwohloka kokufakwa kokushisa okugoqekayo;

Ukwehluleka komugqa wokudlulisela, kufushane noma kushintshana nomhlabathi.

Linganisa amandla kagesi angenamthwalo we-transformer yokushisela yesigaba esisodwa engu-380V ngaphandle kwegama bese ubala umthamo wayo olinganiselwe

Ifomula: Umthamo womshini wokushisela ongu-380, akukho mthwalo wamanje ophindwe kahlanu.

Isixazululo:

I-transformer yokushisela ye-AC yesigaba esisodwa empeleni iyi-transformer eqonde phansi enenhloso ekhethekile. Uma iqhathaniswa ne-transformer evamile, isimiso sayo esiyisisekelo sokusebenza cishe sifana. Ukuze ihlangabezane nezidingo zenqubo yokushisela, i-transformer yokushisela isebenza ngaphansi kwesimo se-short circuit, futhi kuyadingeka ukuthi ibe ne-voltage ethile yokuqala ye-arc ngesikhathi sokushisela.

Uma ugesi wokushisela ukhuphuka, ugesi wokuphuma uyancipha kakhulu. Ngokusho kwe-P=UI (amandla ahlala njalo, ugesi ulingana nogesi ngokuphambene). Uma ugesi wehla uye ku-zero (okungukuthi, ugesi omfushane ohlangothini lwesibili), ugesi ohlangothini lwesibili awumkhulu kakhulu njalo njalo, okungukuthi, ugesi wokushisela unezici zangaphandle zokwehla okukhulu, izici zangaphandle zomshini wokushisela ugesi zitholakala ngokwehla kwegesi okukhiqizwa yi-coil yokusabela.

Akukho mthwalo, ngoba akukho mshini wokushisela odlulayo, ikhoyili yokusabela ayikhiqizi ukwehla kwe-voltage, ngalesi sikhathi i-voltage engenamthwalo ilingana ne-voltage yesibili, okungukuthi, i-transformer engenamthwalo kanye ne-transformer evamile engenamthwalo iyafana. Umthamo ongenamthwalo we-transformer ngokuvamile ucishe ube ngu-6% ~ 8% wamandla alinganisiwe (isimo sibeka ukuthi umkhawulo ongenamthwalo akufanele ube ngaphezu kuka-10% wamandla alinganisiwe)

13 Yazi amandla enjini enezigaba ezintathu, thola amandla ayo alinganiselwe

Ifomula: umthamo ohlukaniswe ngenani lama-kilovolts, uphinda iphuzu le-coefficient elingu-76.

Ucwaningo lwesigameko:

Injini yesigaba sesithathu engu-222 eyaziwa, i-kilowatt engu-3.5 amperes.

1 kw ekhona 0.22 KV * 0.76 impahla 1a

Sinenjini enamandla amakhulu angu-3,000 volts, ama-kilowatts amane nge-ampere.

4 kw samanje 3 kv * 0.76 impahla 1a

Qaphela: ifomula iyasebenza ekubalweni kwamandla kagesi alinganisiwe amamotha anezigaba ezintathu zanoma yiliphi ibanga le-voltage. Uma ifomula isetshenziswa, iyunithi yamandla yi-kW, iyunithi ye-voltage yi-kV kanti iyunithi yamanje yi-A.