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

Kwisekethe ye-AC, kukho iikhonsepthi ezintathu zamandla ombane: amandla asebenzayo, amandla asebenzayo kunye namandla abonakalayo. I-KVA imele amandla abonakalayo, aquka amandla asebenzayo kunye namandla asebenzayo. I-KW imele amandla asebenzayo, kwaye i-kVar imele amandla asebenzayo. Unxulumano phakathi kwe-kW kunye ne-kVar kunye noguqulo kukho uluvo - umba wamandla cos ф, amandla asebenzayo kW=UIcos ф, amandla asebenzayo kVar=UIsin ф, kunye namandla abonakalayo kVA=UI(U yivoltage, mna ngokwangoku).


EyoKwindla 01, 2022
Indlela yokumisela umthamo we-transformer, iminyaka elishumi ubudala yombane ikuxelela le mithetho!

Xa ufaka isicelo kwiziko lonikezelo lwamandla, kufuneka ugcwalise amandla asebenzayo ekufuneka uwasebenzise, ​​oko kukuthi, zingaphi iikW ezifunekayo. Ukuba usetyenziso lwamandla lulonke lwesakhiwo lubalelwa kwi-4500kW, kwixabiso elikhulu kangaka, ibhodi yamandla ngokuqinisekileyo iya kufuna imbuyekezo yamandla asebenzayo. Cinga ukuba amandla akho abuyiselweyo angaphezulu kwe-0.9. Amandla abonakalayo ayakufuna 4500÷0.9=5000kVA, kwaye emva koko uqwalasele umda othile womthwalo kunye neenkcukacha zesiguquli, ndiyoyika ubuncinci be-5600kVA isiguquli. Ewe kunjalo, oku kubalwa nje, ekusetyenzisweni okwenyani, kusafuneka ubone umthwalo wakho ngexesha elinye kunye nezinye izinto ekufuneka uziqwalasele.

Malunga nokukhethwa kwamandla e-transformer, kukho le migaqo ilandelayo yokubhekisela!

Ngokunikwa umthamo we-transformer, fumana ibakala layo lombane kwicala elilinganiswe ngoku

Inkcazo: Ifanelekile kuwo nawuphi na umgangatho wombane.

Ifomula: umthamo wahlulwe ngamandla ombane, uphindaphindwe ngezintandathu zahlulwe ngeshumi.

Into yokuphonononga:

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

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

 

 

Umthamo owaziwayo we-transformer, ukubala ngokukhawuleza kokhuseleko oluphambili kunye nolwesibini ludibanisa ixabiso langoku

 

Ifuse yombane ophezulu weTransformer, uthelekiso lwamandla ombane.

 

Nge fuse yombane ophantsi oguquguqukayo, umthamo uphindaphindwe ngo-9 wahlulwe ngo-5

 

Ukulinganisa umbane wesibini we-transformer yamandla kwaye ubale umthamo wayo womthwalo

 

Ukuhanjiswa okwaziwayo okuguquguqukayo kombane wesibini, kulinganiswe iikilowathi zangoku.

 

Iklasi ye-Voltage 400 volts, enye i-ampere 0.6 kilowatts.

 

I-Voltage rating 3,000 volts, 1 amp 4.5 kilowatts.

 

Voltage class 6,000 volts, one amp integer alithoba kilowatts.

 

Voltage iklasi 10 kv, 1 amp 15 kW.

 

Inqanaba le-Voltage 35,000, 1 amp 55 kilowatts.

 

4. Ukunikezelwa kwamandla e-transformer, fumana i-current rated current ye-voltage grade grade side

 

I-coefficient yombane eqhelekileyo, i-capacitive yophindaphinda i-coefficient yangoku,

 

Ilinganiswe kwi-400 volts, i-coefficient 1.44,

 

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

 

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

 

Qaphela: umlinganiselo olinganisiweyo wecala lomgangatho we-voltage unokufumaneka ngokuphindaphinda umthamo we-transformer ngokuthe ngqo kwi-coefficient ehambelanayo.

 

Khetha ixabiso langoku lokunyibilika kweefuse eziphambili kunye nesekondari ngokomthamo olinganisiweyo kunye nombane we-transformer

 

Ukunyibilika kumacala omabini osasazo kubalwa ngokulula ngokomthamo,

 

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

 

Amandla ombane aphezulu ahlulwe ngamandla ombane, amandla ombane aphantsi aphindaphindwe nge-1.8,

 

Iyunithi ye-ampere yangoku ifunyenwe, kwaye emva koko ikhutshwe okanye yongezwa ngokwebakala.

 

Into yokuphonononga:

 

Umthamo olinganisiweyo wesigaba sesithathu somguquli wamandla ngu-315KVA, i-voltage ye-voltage ephezulu yi-6KV, kunye ne-voltage elinganisiweyo ye-low end yi-400V;

 

Umlinganiselo wangoku wokunyibilika kwicala loxinzelelo oluphezulu (315÷6) A = 52.5a; Umjelo olinganisiweyo wecala le-voltage ephantsi yokunyibilika yi (315×1.8) A=567A

 

Qaphela: ukhetho lwengcaciso yefuse luya kumiselwa ngumahluko phakathi kwexabiso elibaliweyo kunye negeyiji yangoku yokunyibilika.

 

Khetha ixabiso langoku elinyibilikayo leefuse eziphambili kunye nezesekondari ngokwexesha elilinganisiweyo le-transformer 

 

Ngokuhamba kwe-nyibilika kumacala omabini e-transformer, bala ukulinganisa okwangoku amaxesha amaninzi, 

 

Ixabiso lecala loxinzelelo oluphezulu likhulu, kwaye inani liyahluka ngomthamo ohlukeneyo. 

 

Umthamo ukuya kuthi ga kwi-100, kabini ukuya kathathu inani langoku, 

 

Ukuba ingaphezulu kwekhulu, iyancipha ngesibini ukuya kwesinye nesiqingatha, 

 

Ubuncinci bombane obuphezulu bucacisiwe kwaye awukwazi ukuba ngaphantsi kwee-amps ezintathu. 

 

Uxinzelelo oluphantsi lulingana nexabiso elilinganisiweyo kungakhathaliseki ukuba ixabiso levolumu. 

 

7 Iimfuno zofakelo lweziguquli zokuhambisa amandla 

 

Ubuncinci iimitha ezimbini ezinesiqingatha ukusuka emhlabeni, kunye nezithintelo ezifakwe emhlabeni, 

 

Umqobo ubuncinci be-1.8 yeemitha ukuphakama, ushiya inqaku lesibhozo lomdlalo, 

 

Ukuba uqoqosho luvumela, kuyafaneleka ngakumbi ukusebenzisa uhlobo lwebhokisi. 

 

Akufunekanga ibekwe kwindawo evulekileyo ngaphandle kokuba isetyenziswe okwethutyana. 

 

Ufakelo lwangaphakathi kufuneka lufakwe umoya, kwaye imigudu ejikelezileyo kufuneka ifaneleke. 

 

8 Ukubonelela ngomgangatho wamandla ombane kwiziguquli zokusasaza 

 

Kuphela xa i-voltage yonikezelo iqinisekisiwe, ngaba isixhobo sinokusebenza ngokuqhelekileyo 

 

Ukutenxa okuphezulu kunye nokuphantsi kucacisiwe. Umbane wahlukile. 

 

Umbane phakathi kwemigca dibanisa okanye thabatha isixhenxe, thabatha ishumi dibanisa isixhenxe sisigaba, 

 

Ukuba iimfuno zikhethekileyo, unikezelo kunye nemfuno amaqela ukuba axoxe. 

 

Isigqibo: 

 

Kwinkqubo yonikezelo lwamandla e-low-voltage yaseChina, umbane wombane ngu-380V, kwaye ukutenxa okuvumelekileyo ngu-± 7%, oko kukuthi 353.4 ~ 406.6V;  I-voltage yesigaba i-220V, kwaye ukuphambuka okuvumelekileyo -10% ~ + 7%, oko kukuthi 198 ~ 235.4V. 

 

Ukufunyaniswa kokuguquka kwe-transformer insulation 

 

Qinisekisa ukusebenza ngokukhuselekileyo kwenguqu kwaye ujonge iingozi ezifihlakeleyo ngokulinganisa ukugquma. 

 

Sebenzisa imitha ye-megohm ukulinganisa, khetha imitha ngokombane. 

 

Ngaphezu kwesithathu, isihlanu, isibini, isihlanu, kunye newaka ngaphantsi kweshumi. 

 

Isiphelo se-E sesixhobo kufuneka sidityaniswe phantsi, kwaye isiphelo se-G kufuneka songezwe ngenxa yokungcola okunzulu. 

 

Ukuvuthuza okungenakulinganiswa kunye namacandelo, isiseko esithembekileyo sokuqinisekisa ukhuseleko. 

 

Isantya sokujikeleza kwesandla se-120, emva kokukhutshwa kovavanyo uze ususe ucingo. 

 

Qaphela: kwi-35KV nangaphezulu ii-transformers kufuneka zisebenzise i-2500V megohmmeter;  Ukwenzela iziguquli ukuya kuthi ga kwi-10KV, i-1000V megohmmeter kufuneka isetyenziswe, isiphelo se-L siqhagamshelwe kwi-winding ye-transformer, i-E end grounded. 

 

Ukusebenza okufanayo kwee-transformer ezimbini 

 

I-parallel i-transformer ezimbini, iimeko ezine zokulungiselela; 

 

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

 

I-voltage ye-impedance kufuneka ihambelane, idityaniswe enye kwenye ngokulandelelana kwesigaba; 

 

Umahluko wamandla akufanele ube mkhulu, kungcono ukuba ungadluli kwisithathu ukuya kwelinye. 

 

11 I-fuse ye-transformer yokusabalalisa yaphukile 

 

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

 

Ukuchazwa kwefuse kuncinci;  Umonakalo okumgangatho ophantsi kunzima ukuwuthwala; 

 

I-high voltage lead short circuit;  Ukuqhekeka kwe-insulation yangaphakathi; 

 

Umonakalo ngenxa yempembelelo yombane;  Ukuqhawuka kweCasing okanye ukwaphuka. 

 

Ukuba i-fuse yoxinzelelo oluphantsi iphukile, izizathu ezihlanu zokugweba. 

 

Ukuchazwa kwefuse kuncinci;  Umonakalo okumgangatho ophantsi kunzima ukuwuthwala; 

 

Umthwalo ogqithisileyo ixesha elide;  Ukuqhekeka kwe-insulation yomoya; 

 

Ukusilela komgca wothumelo, omfutshane okanye otshintshisanayo nomhlaba. 

 

Ukulinganisa i-no-load yangoku ye-380V yesigaba esinye se-welding transformer ngaphandle kwe-nameplate kwaye ubale umthamo wayo olinganisiweyo 

 

Ifomula: 380 umthamo welder, akukho umthwalo ngoku ngokuphindwe ezintlanu. 

 

Isigqibo: 

 

Inqanaba elinye le-AC ye-welding transformer ngokwenene yinjongo ekhethekileyo ye-step-down transformer. Xa kuthelekiswa ne-transformer eqhelekileyo, umgaqo wayo osisiseko wokusebenza uphantse ufane.  Ukuze uhlangabezane neemfuno zenkqubo ye-welding, i-welding transformer isebenza phantsi kweemeko zesiphaluka esifutshane, kwaye kufuneka ibe ne-arc ethile yokuqala i-voltage ngexesha lokudibanisa. 

 

Xa i-welding current inyuka, i-voltage ye-output iyancipha ngokukhawuleza.  Ngokutsho kwe-P=UI (amandla ahlala ekhona, amandla ombane adityaniswa ngokungafaniyo nelangoku).  Xa i-voltage isiwela kwi-zero (oko kukuthi, icala lesibini lesekethe emfutshane), icala lesibini langoku alikho likhulu kakhulu kwaye njalo njalo, oko kukuthi, i-welding transformer ineempawu zangaphandle zokuhla, iimpawu zangaphandle ze-welding transformer. ifunyenwe ngokuhla kwamandla ombane okwenziwa yi-coil yokusabela. 

 

Akukho mthwalo, ngenxa yokuba akukho welding yangoku ngokusebenzisa, icoil reactance ayivelisi ukuhla kwamandla ombane, ngeli xesha i-voltage akukho-mthwalo ilingana nombane wesibini, oko kukuthi, i-welding transformer akukho-load kunye ne-transformer eqhelekileyo akukho- layisha ngokufanayo.  I-no-load current ye-transformer ngokubanzi malunga ne-6% ~ 8% ye-current rated current (i-state ichaza ukuba i-no-load current ayifanele ibe ngaphezu kwe-10% ye-current rated current) 

 

13 Yazi umthamo wemotor enezigaba ezithathu, fumana ireyithingi yangoku 

 

Ifomula: umthamo wahlulwe ngenani leekilovolthi, amaxesha encopho ye-coefficient 76. 

 

Into yokuphonononga: 

 

Isigaba sesithathu se-222 motor eyaziwayo, i-kilowatt 3.5 amperes. 

 

1 kw ngoku 0.22 KV * 0.76 imathiriyeli 1a 

 

Sine-voltage ephezulu ye-3,000 volt motor, iikilowathi ezine ngeampere nganye. 

 

4 kw ngoku 3 kv * 0.76 imathiriyeli 1a 

 

Qaphela: ifomyula iyasebenza ekubaleni ukulinganisa kwangoku kweenjini zesigaba sesithathu salo naliphi na ibakala lombane.  Xa i-formula isetyenziswa, iyunithi yomthamo yi-kW, iyunithi yombane yi-kV kunye neyunithi yangoku ngu-A. 

 


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