Indlela yokumisela umthamo we-transformer, ingcali yombane eneminyaka elishumi ubudala ikuxelela le mithetho!

Xa ufaka isicelo kwi-bureau yombane, kufuneka ugcwalise amandla asebenzayo ekufuneka uwasebenzise, ​​oko kukuthi, zingaphi ii-kW ezifunekayo. Ukuba ukusetyenziswa kwamandla okupheleleyo kwesakhiwo kubalwa ukuba yi-4500kW, ngesixa esikhulu kangaka, ibhodi yamandla ngokuqinisekileyo iya kufuna imbuyekezo yamandla asebenzayo. Cinga ukuba amandla akho ahlawulelweyo angaphezulu kwe-0.9. Amandla abonakalayo aya kufuna i-4500÷0.9=5000kVA, uze ucinge nge-load margin ethile kunye neenkcukacha ze-transformer, ndiyoyika ukuba i-transformer encinci ye-5600kVA. Ewe, oku kukubalwa nje, xa kusetyenzwa ngokwenene, kusafuneka ubone umthwalo wakho ngesantya esifanayo kunye nezinye izinto ekufuneka ziqwalaselwe.

Malunga nokukhetha umthamo we-transformer, kukho le mithetho ilandelayo onokuyisebenzisa!

Ngenxa yomthamo we-transformer, fumana umlinganiselo wayo we-voltage grade current

Inkcazo: Ifanelekile nakweyiphi na inqanaba le-voltage.

Ifomula: umthamo owahlulwe yi-voltage, uphindaphindwe ngesithandathu owahlulwe ngeshumi.

Into yokuphonononga:

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

Ingqikelelo I=1000KVA/10KV * 6/10=60A

Umthamo we-transformer owaziwayo, ukubalwa ngokukhawuleza kokhuseleko oluphambili nolwesibini kudibanisa ixabiso langoku

I-fuse ye-transformer high voltage, uthelekiso lwe-voltage yomthamo.

Nge-fuse ye-voltage ephantsi eguquguqukayo, umthamo uphindaphindwe ngo-9 wahlulwe ngo-5

Linganisa umsinga wesibini we-power transformer uze ubale umthamo wayo womthwalo

I-voltage yesibini yokusasazwa eyaziwayo, i-kilowatts zangoku ezilinganisiweyo.

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

Uvavanyo lweVolthiji yi-3,000 volts, i-1 amp eyi-4.5 kilowatts.

I-voltage class yi-6,000 volts, i-amp integer enye yi-9 kilowatts.

Udidi lweVolthiji 10 kv, i-1 amp 15 kW.

Inqanaba leVoltage yi-35,000, i-1 amp eyi-55 kilowatts.

4. Ngenxa yomthamo we-transformer, fumana umbane olinganisiweyo wecala layo le-voltage grade

I-coefficient ye-voltage eqhelekileyo, i-coefficient yokuphindaphinda kwe-capacitive yangoku,

Ilinganiswe kwi-400 volts, i-coefficient 1.44,

I-voltage elinganisiweyo yi-6000 volts, i-coefficient zero 096,

Ilinganiswe kwi-10,000 volts, i-coefficient yi-0.6 kuphela.

Qaphela: umbane olinganisiweyo wecala le-voltage grade ungafunyanwa ngokuphindaphinda umthamo we-transformer ngokuthe ngqo nge-coefficient ehambelanayo.

Khetha ixabiso langoku lokunyibilika kweefusi eziphambili nezesibini ngokwezinga lomthamo kunye nevolthi yetransformer elinganisiweyo

Ukuhamba kokunyibilika kumacala omabini osasazo kubalwa ngokulula ngokwendlela amandla,

Iyunithi yomthamo yi-kilovolt ampere kwaye iyunithi yombane yi-kilovolt.

Umthamo wevolthi ephezulu wahlulwe yivolthi, ivolthi ephantsi iphindaphindwe nge-1.8,

Iyunithi ye-current ampere ifunyenwe, ize isuswe okanye yongezwe ngokwenqanaba.

Into yokuphonononga:

Umthamo olinganisiweyo we-transformer yamandla yesigaba esithathu yi-315KVA, i-voltage elinganisiweyo yesiphelo esiphezulu yi-6KV, kwaye i-voltage elinganisiweyo yesiphelo esisezantsi yi-400V;

Umlinganiselo wamandla onyibilikayo kwicala loxinzelelo oluphezulu ngu (315÷6) A= 52.5a; Umlinganiselo wamandla onyibilikayo kwicala loxinzelelo oluphantsi ngu (315×1.8) A=567A

Qaphela: ukhetho lweenkcukacha zefuse luza kugqitywa ngumahluko phakathi kwexabiso elibaliweyo kunye negeyiji yamandla okunyibilika.

Khetha ixabiso langoku elinyibilikisiweyo leefuses eziphambili nezesibini ngokwexabiso langoku elilinganisiweyo letransformer

Ngokuhamba komoya onyibilikayo kumacala omabini e-transformer, bala umbane olinganisiweyo izihlandlo ezininzi,

Ixabiso lecala loxinzelelo oluphezulu likhulu, kwaye inani liyahluka ngokwemikhono eyahlukeneyo.

Umthamo ukuya kuthi ga kwi-100, kabini ukuya kathathu ubuninzi bombane,

Ukuba ingaphezulu kwekhulu, incitshiswa ngeebini ukuya kwisinye nesiqingatha,

I-voltage ephezulu incinci ichaziwe kwaye ayinakuba ngaphantsi kwee-amps ezintathu.

Uxinzelelo oluphantsi lulingana nexabiso elilinganisiweyo nokuba ixabiso levolumu lingakanani na.

Iimfuneko ezi-7 zokufakelwa kwee-transformers zokusasaza umbane

Ubuncinane iimitha ezimbini ezinesiqingatha ukusuka emhlabeni, kunye nemiqobo efakwe emhlabeni,

Umqobo ubuncinci ubude buyi-1.8 yeemitha, nto leyo eshiya inqaku lesibhozo lomdlalo,

Ukuba uqoqosho luyavuma, kungcono ukusebenzisa uhlobo lwebhokisi.

Akufanele ibekwe kwindawo evulekileyo ngaphandle kokuba isetyenziswa okwethutyana.

Ukufakelwa ngaphakathi endlini kufuneka kungene umoya, kwaye imijelo ejikelezileyo kufuneka ifaneleke.

8 Umgangatho wombane wokubonelela ngeetransformer zokusasaza

Kuphela xa i-voltage yombane iqinisekisiwe, apho izixhobo zinokusebenza ngokuqhelekileyo

Ukuphambuka okuphezulu nokuphantsi kuchaziwe. I-voltage yahlukile.

I-voltage phakathi kwemigca yi-plus okanye i-minus seven, i-minus ten kunye ne-seven yi-phase,

Ukuba iimfuno zikhethekile ngakumbi, amaqela okubonelela kunye neemfuno kufuneka axoxe ngazo.

Isisombululo:

Kwinkqubo yokubonelela ngombane esezantsi eTshayina, i-voltage yomgca yi-380V, kwaye ukuphambuka okuvumelekileyo yi-± 7%, oko kukuthi yi-353.4 ~ 406.6V; I-voltage yesigaba yi-220V, kwaye ukuphambuka okuvumelekileyo yi--10% ~ + 7%, oko kukuthi yi-198 ~ 235.4V.

Ukufunyanwa kokugquma kwe-transformer insulation

Qinisekisa ukusebenza ngokukhuselekileyo kotshintsho kwaye ujonge iingozi ezifihlakeleyo ngokulinganisa ubushushu.

Sebenzisa imitha ye-megohm ukulinganisa, khetha imitha ngokwe-voltage.

Ngaphezulu kwesithathu, isihlanu, ezimbini, ezintlanu, kunye newaka elingaphantsi kweshumi.

Isiphelo sesixhobo kufuneka siqhagamshelwe emhlabeni, kwaye isiphelo se-G kufuneka songezwe xa kungcoliseka kakhulu.

Ukujika okungalinganiswanga kunye nezinto ezisetyenziswayo, ukuseka okuthembekileyo ukuqinisekisa ukhuseleko.

Isantya sokujikeleza ngesandla 120, emva kokukhupha uvavanyo uze ukhuphe ucingo.

Qaphela: kwi-35KV nangaphezulu, ii-transformers kufuneka zisebenzise i-2500V megohmmeter; Kwi-transformers ukuya kuthi ga kwi-10KV, kufuneka kusetyenziswe i-1000V megohmmeter, i-L end iqhagamshelwe kwi-winding ye-transformer, i-E end isekelwe phantsi.

Ukusebenza ngaxeshanye kwee-transformers ezimbini

Iitransformer ezimbini ezihambelanayo, iimeko ezine ekufuneka zilungiswe;

Amaqela eentambo kufuneka afane, kufuneka kubekho umlinganiselo ofanayo we-transformer;

I-voltage ye-Impedance kufuneka ihambelane, iqhagamshelwe ngokulandelelana kwesigaba;

Umahluko womthamo akufanele ube mkhulu, kungcono ungadluli kwisithathu kwisinye.

11 I-fuse ye-transformer yosasazo yaphukile

Ukuba i-fuse yoxinzelelo oluphezulu yaphukile, izizathu ezintandathu zokugweba.

Inkcazelo yefuse incinci; Umonakalo ophantsi womgangatho kunzima ukuwuthwala;

I-short circuit ye-lead ene-voltage ephezulu; Ukwaphuka kwe-insulation yangaphakathi;

Umonakalo obangelwa kukubethwa ngumbane; Ukuqhekeka okanye ukuqhekeka kwekhava.

Ukuba i-fuse yoxinzelelo oluphantsi yaphukile, izizathu ezintlanu zokugweba.

Inkcazelo yefuse incinci; Umonakalo ophantsi womgangatho kunzima ukuwuthwala;

Umthwalo ogqithisileyo ixesha elide; Ukuphazamiseka kokufakwa kwe-insulation okujikelezayo;

Ukusilela komgca wothumelo, kufutshane okanye kutshintshana nomhlaba.

Linganisa umsinga ongenamthwalo we-380V single-phase welding transformer ngaphandle kwegama kwaye ubale umthamo wayo olinganiselweyo

Ifomula: Umthamo wokufaka intsimbi engama-380, akukho mthwalo wangoku uphindaphindwe kahlanu.

Isisombululo:

I-transformer yokuwelda ye-AC yesigaba esinye ngokwenene yi-transformer ejongeka isezantsi eneenjongo ezikhethekileyo. Xa ithelekiswa ne-transformer eqhelekileyo, umgaqo wayo osisiseko wokusebenza uphantse ufane. Ukuze ihlangabezane neemfuno zenkqubo yokuwelda, i-transformer yokuwelda isebenza phantsi kwemeko ye-short circuit, kwaye kufuneka ibe ne-arc starting voltage ethile ngexesha lokuwelda.

Xa umsinga we-welding unyuka, i-voltage ephumayo iyancipha kakhulu. Ngokwe-P=UI (amandla ahlala ekhona, i-voltage ilingana ngokuphambeneyo nomsinga). Xa i-voltage iwela kwi-zero (oko kukuthi, i-secondary side short circuit), umsinga we-secondary side awumkhulu kakhulu njalo njalo, oko kukuthi, i-welding transformer ineempawu zangaphandle zokuwa okukhulu, iimpawu zangaphandle ze-welding transformer zifunyanwa kukuwa kwe-voltage okuveliswa yi-reactance coil.

Akukho mthwalo, kuba akukho mbane welding, i-reactance coil ayivelisi kwehla kwe-voltage, ngeli xesha i-voltage engenamthwalo ilingana ne-voltage yesibini, oko kukuthi, i-welding transformer engenamthwalo kunye ne-transformer eqhelekileyo engenamthwalo iyafana. I-current engenamthwalo ye-transformer ngokubanzi imalunga ne-6% ~ 8% yamandla alinganisiweyo (imeko ichaza ukuba i-current engenamthwalo akufuneki ibe ngaphezulu kwe-10% yamandla alinganisiweyo)

13 Yazi umthamo wemoto enamanqanaba amathathu, fumana umbane wayo olinganiselweyo

Ifomula: umthamo owahlulwe ngenani leekhilovolts, uphindaphinda inqaku le-coefficient eliyi-76.

Into yokuphonononga:

Imoto yesigaba sesithathu sama-222 eyaziwayo, i-kilowatt eyi-3.5 amperes.

1 kw ekhoyo 0.22 KV * 0.76 izinto 1a

Sinenjini enamandla aphezulu angama-3,000 volts, ii-kilowatts ezine nge-ampere nganye.

4 kw ekhoyo 3 kv * 0.76 izinto 1a

Qaphela: le fomula iyasebenza ekubalweni kombane olinganisiweyo weemoto zesigaba sesithathu zalo naluphi na uhlobo lombane. Xa kusetyenziswa le fomula, iyunithi yomthamo yi-kW, iyunithi yombane yi-kV kwaye iyunithi yangoku yi-A.