Indlela yokunquma i-polarity ye-transformer yamanje?

I-Transformer yamanje (CT) iyithuluzi likagesi elibalulekile ohlelweni lwamandla.Inesibopho sokuhlukaniswa phakathi kwezinhlelo zamandla kagesi aphezulu naphansi kanye nokuguqulwa kwamandla kagesi aphezulu ukuya ku-low voltage.Ukuthi izintambo zilungile noma cha kubaluleke kakhulu ekusebenzeni okuvamile kokuvikela, ukulinganisa, ukulinganisa kanye nezinye izinto zokusebenza zesistimu.Lapho kufakwa i-CT entsha futhi kufakwa ikhebula lesibili le-CT lisebenza noma lishintshwa, ukukala ukunemba kwe-CT polarity sekuvele kuyinqubo yomsebenzi ebalulekile yabasebenzi bokuvikela i-relay.Okulandelayo, i-HV Hipot izokwethula ukulinganisa kwe-CT polarity ngokuningiliziwe:

                                                               Isihloli sesici se-HV Hipot GDHG-201A esibanzi se-CT/PT

1. Iyini i-polarity ye-CT?

I-polarity amandla e-electromotive adangwe ikhoyili eyinhloko kanye nekhoyili yesibili ngaphansi kwesenzo sokugeleza kwamagnetic okufanayo kwengqikithi yensimbi.Iziphetho ezimbili ezifinyelela amandla aphezulu ngesikhathi esifanayo noma ekugcineni okungamandla aphansi ngesikhathi esifanayo zibizwa ngokuthi ukuphela okufanayo kwe-polarity.

Okubizwa ngokuthi i-current transformer (CT) polarity ibhekisela ebudlelwaneni phakathi kwesikhombisi-ndlela samanje phakathi kwamajika ayo ayinhloko kanye namajika esibili.Ngokwemithethonqubo, isiphetho sokuqala se-CT primary winding simakwe njenge-P1, futhi isiphetho somsila simakwe njenge-P2;isiphetho sekhanda sokuphenduka kwesibili simakwe njenge-S1, futhi isiphetho somsila simakwe njenge-S2.Kuzintambo, i-P1 ne-S1, i-P2 ne-S2 zibizwa ngokuthi ukuphela kwe-polarity efanayo.Uma sicabanga ukuthi i-I1 yamanje ye-primary winding igeleza isuka ekugcineni kwekhanda i-P1 futhi igeleza iphuma ekugcineni komsila we-P2, i-I2 yamanje engenisiwe kumoya wesibili igeleza isuka ekugcineni kwekhanda S1 futhi igeleze isuka ekugcineni komsila i-S2.Ngalesi sikhathi, i-flux kazibuthe ekhiqizwa engxenyeni yensimbi Ngasohlangothini olufanayo, uphawu olunjalo lwe-CT polarity lubizwa ngokuthi i-depolarization.Ngokuphambene nalokho, kubizwa ngokuthi ukwengeza i-polarity.Ama-transformer amanje asetshenziswa ngokuvamile, ngaphandle uma kuchazwe ngenye indlela, sebenzisa i-depolarization.

2. Kungani kulinganiswa i-polarity ye-CT?

I-polarity ye-transformer yamanje kufanele ihlolwe ngaphambi nangemuva kokunikezelwa nokulungiswa kabusha.Ukwengeza, lapho ukuvikela okuhlukile kusebenza, ukungasebenzi kahle kokuvikela isiqondiso samandla noma imitha yehora le-watt ihlehliswa, i-polarity ye-CT kumele nayo ihlolwe.Kungenxa yokuthi uma i-polarity ye-transformer yamanje ixhunywe ngokungalungile ngesikhathi se-wiring, izingozi ezilandelayo zizokwenzeka:

(1) Uma i-transformer yamanje isetshenziswa kumjikelezo wokuvikela i-relay, izobangela ukuthi idivayisi yokuvikela i-relay ingasebenzi kahle noma yenqabe ukusebenza, futhi ngesikhathi esifanayo, izothinta ukuqapha ukusebenza kanye nokuphathwa kwengozi yesistimu yamandla, futhi ngisho nokubeka engcupheni okokusebenza nokuphepha komuntu siqu ezimweni ezimbi kakhulu.

(2) Uma i-transformer yamanje isetshenziswa kumjikelezo wokulinganisa insimbi, izokwenza inkomba yamathuluzi ahlukahlukene namamitha kanye nesilinganiso samandla kagesi asilungile.

(3) Uma i-transformer yamanje enokuxhumeka kwenkanyezi okungaphelele isetshenziswa, uma i-polarity yanoma yisiphi isigaba iguqulwa, i-current yesigaba esisodwa (imvamisa isigaba esiphakathi) se-transformer yamanje engaxhumekile izoba izikhathi eziningana kunezinye izigaba.

(4) Uma i-transformer yamanje enokuxhumeka kwenkanyezi okungaphelele isetshenziswa, uma izigaba ezimbili zihlehliswa, nakuba i-current yesigaba sesithathu ohlangothini lwesibili isengakwazi ukugcina ibhalansi, umehluko we-engeli yesigaba ne-primary side current ehambisanayo yi-180 °, ngakho lokho kuzohlehlisa imitha.

Ngakho-ke, kuwumsebenzi obaluleke kakhulu ukwahlulela kahle ukuthi i-polarity ye-transformer yamanje ilungile noma cha.