Umahluko phakathi komgaqo wesenzo sokukhanya okuguquguqukayo okuphambili kunye nokukhuselwa kwegesi enzima

Izixhobo zokukhusela ezifanelekileyo kufuneka zifakelwe iimpazamo ze-short-circuit zeengcingo ze-transformer lead, ii-bushings kunye nezangaphakathi, kwaye ziya kuhlangabezana neemfuno ezilandelayo:

1) I-transformer esebenza ngombane enye ye-10MVA nangaphezulu kunye ne-transformer esebenza ngombane efanayo ye-6.3MVA nangaphezulu kufuneka zixhotyiswe ngokhuseleko lokwahluka olude. Ii-transformer ezibalulekileyo ezine-6.3MVA nangaphantsi ezisebenza ngokuzimeleyo nazo zinokuxhotyiswa ngokhuseleko lokwahluka olude.

2) Iitransformer ezingaphantsi kwe-10MVA zinokuxhotyiswa ngokhuseleko lwangoku olukhawulezayo kunye nokhuseleko lwangoku olugqithisileyo. Kwiitransformer ze-2MVA nangaphezulu, xa i-coefficient yangoku yokuguquguquka okukhawulezayo ingahlangabezani neemfuno, kufuneka kufakwe ukhuseleko lokwahluka kwe-longitudinal.

3) 0.4MVA nangaphezulu, i-voltage yokuqala yi-10kV nangaphantsi, kwaye i-coil yi-transformer enonxibelelwano lwe-delta-star, kwaye ukhuseleko lwe-overcurrent olunezigaba ezimbini ze-relay ezintathu lungasetyenziswa.

4) Izixhobo ezahlukeneyo zokukhusela ezichazwe kweli nqaku ziya kusebenza ukuze zikhuphe ii-circuit breakers kumacala omabini e-transformer.

Ngexesha lokusebenza kwe-transformer, ngenxa yeziphene zangaphakathi, ngamanye amaxesha asikwazi ukubona nokuthatha amanyathelo ngexesha, nto leyo elula ukubangela iingozi ezithile. Emva kokukhuselwa kwe-gas relay, ukwenzeka kweziganeko ezifanayo kunokuthintelwa ukuya kuthi ga kwinqanaba elithile.

■ Intshayelelo yoKhuseleko lweGesi

Ngexesha lokusebenza kwe-transformer, ngenxa yeziphene zangaphakathi, ngamanye amaxesha asikwazi ukubona nokuthatha amanyathelo ngexesha, nto leyo elula ukubangela iingozi ezithile. Emva kokukhuselwa kwe-gas relay, ukwenzeka kweziganeko ezifanayo kunokuthintelwa ukuya kuthi ga kwinqanaba elithile.

Ukhuseleko lwegesi lwahlulwe ngokhuselo lwegesi ekhanyayo kunye nokhuseleko lwegesi enzima. Umgaqo wokusebenza wegesi ekhanyayo kunye negesi enzima wahlukile. Igesi ekhanyayo kungenxa yokuba igesi iqokelelene kwikomityi evulekileyo ijonge ezantsi, ukuze ikomityi evulekileyo intante phezulu phantsi kwesenzo sokubhabha kweoyile yetransformer, ivule irelay, kwaye ikhuphe i-alamu, ebonisa ukuba impazamo kwitransformer incinci, kwaye ioyile yetransformer Ukubola kobushushu kuvelisa igesi. Igesi enzima ibangelwa yimpazamo enkulu kwitransformer, xa ioyile yetransformer ishushu kwaye ikhula ngokukhawuleza kwaye ikhawuleze iye kumqamelo weoyile, i-baffle yangaphakathi yegesi enzima itshixizwa kwi-engile ethile, kwaye irelay ivuliwe ukuvelisa isignali. Indawo eqhelekileyo yokujika yokufaka. Ngaphandle kokuba kukho ukuhluzwa kweoyile, ukuphinda kuzaliswe ioyile kunye neminye imisebenzi. Ngokubanzi, ukhuseleko olungengombane lweetransformer ezinkulu ezintywilisiweyo kwioyile lubandakanya: ukukhululwa koxinzelelo, ukuguqulwa koxinzelelo, njl.

Ukhuseleko lwegesi lolunye lwezona zinto ziphambili ezikhusela iitransformer, ezizezokhuseleko olungelulo olombane. Umahluko ophambili phakathi kokhuseleko olubizwa ngokuba lukukhanya nokhuseleko lwegesi enzima ngumahluko kwixabiso lokuseta i-relay yegesi. Igesi ekhanyayo ithumela isignali ye-alamu kuphela, ayikhubeki, kwaye igesi enzima iya kukhubeka. I-voltage ye-zero-sequence ilingana ne-phasor sum yee-voltages zesigaba esithathu. Indlela yokubala ye-zero sequence current iyafana.

■ Yintoni umgaqo wokukhusela igesi enzima

Kuthiwa ukhuseleko lwegesi lwe-transformer lusekelwe kumgaqo we-float reed relay. Ikomityi yeoyile iqhagamshelwe kwigumbi le-transformer. Xa i-transformer igcwele kakhulu, umbane ogqithisileyo uvelisa igesi ukuze i-float iwele kwindawo ethile. I-relay yokuqala iqhagamshelwe ekukhanyeni. I-alamu yegesi, igesi iyaqhubeka nokuhla xa i-float inyusiwe, kwaye i-relay yesibini iqhagamshelwe kwigesi enzima ukuze ithintele iswitshi.

■ Umahluko phakathi komgaqo wokusebenza wokukhusela igesi ekhaphukhaphu kunye nokukhusela igesi enzima

Ukhuseleko lwegesi lolona khuselo luphambili lwe-transformer, olunokubonakalisa ngempumelelo isiphene sangaphakathi se-transformer. I-relay yegesi ekhanyayo yenziwe ngekomityi evulekileyo, i-reed contact eyomileyo, njl.njl., kwaye isebenza kwisignali. I-relay yegesi enzima yenziwe ngama-baffles, izipringi, i-reed contacts, njl.njl., asebenza xa ekhubeka.

Ngexesha lokusebenza okuqhelekileyo, i-gas relay izaliswa yioyile, indebe evulekileyo intywiliselwa kwioyile, ikwindawo yokudada, kwaye ii-reed contacts ziyaqhawulwa. Xa kwenzeka impazamo yangaphakathi ye-transformer, kwenzeka ubushushu obuphezulu kwindawo yempazamo, nto leyo ebangela ukwanda kweoyile ye-transformer ekufutshane, kwaye umoya onyibilikisiweyo kwioyile uyaphuma, wenze amaqamza kwaye unyuke. Xa impazamo incinci, igesi ekhutshiweyo inyuka kancinci ize ingene kwi-gas relay, nto leyo ebangela ukuba inqanaba leoyile lehle. I-fulcrum eveliswa yi-open cup kukujikeleza kwe-shaft okuchasene newotshi, okwenza i-reed contact iqhagamshelane kwaye ithumele isignali.

Xa ukusilela kwangaphakathi kwe-transformer kukubi kakhulu, kuvela igesi enamandla yegesi, nto leyo ebangela ukuba uxinzelelo lwangaphakathi lwe-transformer lunyuke ngequbuliso, kwaye ukuhamba kweoyile okukhulu kuchaphazela icala lomqamelo weoyile. Ngenxa yokuba ukuhamba kweoyile kubetha i-baffle, i-baffle iyoyisa ukumelana kwentwasahlobo kwaye iqhube imagnethi ukuba yome. Icala loqhagamshelwano lwengcongolo liyahamba, ukuze unxibelelwano lwengcongolo luvulwe kwaye lusebenze ekuhambeni.

Uphawu lokudluliselwa kwereyila lubhekisa kulwalamano phakathi kobungakanani bokufaka kunye nobungakanani bokuphuma kwereyila kwinkqubo yonke yokutshintsha. Nokuba yintshukumo okanye ukubuya, ireyila isuka kwindawo yokuqala ukuya kwindawo yokugqibela, akunakwenzeka ukuba ihlale kwindawo ethile ephakathi. Olu phawu lubizwa ngokuba luphawu lokudluliselwa kwereyila.