Yintoni i-DC Circuit Breaker?

I-DC ye-circuit breaker ibhekisela kwi-breaker circuit esetyenziswa kwinkqubo yokuhambisa amandla e-DC, enokukhusela izixhobo zombane ezisebenza kumandla e-DC.Ngokuqhelekileyo ilungele ukuveliswa kwamandla elanga le-photovoltaic kunye neenkqubo zokuhambisa amandla, iinkqubo zokugcina amandla ebhetri, kunye neenkqubo ezintsha zokutshaja izithuthi zeDC.Slocable kaThixo solar DC izaphuli zeseketheziyilelwe ukukhusela iintambo ezibekwe phakathi kweqela ngalinye leemodyuli ze-PV kunye ne-PV inverters ukusuka kwi-overload kunye ne-short-circuit DC circuits, kwaye zifakwe kwi-enclosures yokukhusela i-PV ekupheleni komtya ngamnye weemodyuli ze-PV.

I-terminal yamandla egalelo ye-DC circuit breaker yinkqubo yangoku ngokuthe ngqo.I-General DC izaphuli zesekethe ziquka i-DC MCB (i-DC encinci ye-circuit breaker), i-DC MCCB (i-DC ebunjiweyo ye-circuit breaker) kunye nohlobo lwe-RCD ye-B (isixhobo sangoku esishiyekileyo).

I-DC Miniature Circuit Breaker (DC MCB)

I-DC miniature breakers circuit breakers ziyilelwe izicelo zesekethe ze-DC zokukhusela i-overcurrent kunye ne-short circuit kwizixhobo okanye izixhobo zombane.I-DC mini izaphuli zesekethe zixhotyiswe ngemagnethi ekhethekileyo enyanzela i-arc kwi-arc slot kwaye icime i-arc ngexesha elifutshane kakhulu.

Isekethe ye-DC inokutshixwa kwindawo OFF ngokusebenzisa isixhobo sokutshixa njengenyathelo lokhuseleko lokuqhaqha i-inverter ye-PV.Ekubeni i-fault current ingaqukuqela kwicala elichaseneyo ne-operating current, i-DC circuit breaker inokubona kwaye ithintele nayiphi na i-bidirectional current flow.Kwimeko nayiphi na into, isenzo esikhawulezayo kwintsimi siyafuneka ukucima impazamo yangoku.

Izaphuli zesekethe ezincinci zeDC zisetyenziswa ikakhulu kwiinkqubo zeDC ezifana namandla amatsha, iphotovoltaic yelanga kunye neenkqubo zokugcina amandla ebhetri elanga.Imo yombane ye-DC mini yebreaker circuit idla ngokuba yi-DC 12V-1500V.

I-DC MCB kunye ne-AC MCB zinomsebenzi ofanayo, umahluko ophambili yiparameters ezibonakalayo zemveliso.Ngaphezu koko, iimeko zokusetyenziswa kwe-AC MCB kunye ne-DC MCB zahlukile.

I-AC circuit breaker iphawulwe kwimveliso njenge-LOAD kunye ne-LINE, kwaye isimboli ye-DC circuit breaker iphawulwe kwimveliso njenge-positive (+), i-negative (-) iimpawu kunye nolwalathiso lwangoku.

Yintoni uMsebenzi weDC Mini yeSekethe Breakers?

Imigaqo efanayo yokhuseleko lwe-thermal kunye nemagnethi yokhuseleko njengezaphuli zesekethe ze-AC zisebenza kwi-DC miniature breakers.

Ukhuseleko lwe-Thermal luhamba nge-DC mini i-circuit breaker xa i-current idlula ixabiso elilinganisiweyo.Kule ndlela yokukhusela, uqhagamshelwano lwe-bimetallic thermally lwandisa kwaye luhamba nge-breaker circuit.Ukhuseleko lwe-Thermal lusebenza ngokukhawuleza kuba ubushushu obuninzi buveliswa ukwandisa kwaye uvule uqhagamshelo lombane xa umsinga uphezulu kakhulu.Ukhuseleko olushushu lwezaphuli zesekethe ze-DC luthintela ukugcwala kwemisinga ephezulu kancinci kunemisinga yokusebenza eqhelekileyo.

Ukhuseleko lwemagnethi luhamba nge-DC MCBs xa kukho imisinga enamandla empazamo, kwaye impendulo ihlala kwangoko.Njengakwizaphuli zesekethe ze-AC, umthamo wokwaphuka olinganiselweyo we-DC yezaphuli zesekethe imele eyona mpazamo ibalulekileyo yangoku enokuphazamiseka.Kwi-DC mini breaker, i-current blocked current, oku kuthetha ukuba i-breaker circuit kufuneka ivule ngakumbi oonxibelelwano lombane ukuphazamisa i-fault current.Ukhuseleko lwemagnethi lweDC miniature breakers circuit ikhusela kuluhlu olubanzi lweesekethe ezimfutshane kunye neempazamo kunomthwalo ongaphezulu.

Kutheni i-DC Solar Circuit Breakers ibalulekile kwiiNkqubo zePV?

Iinkqubo ze-Photovoltaic zinamandla okuba yindlela esebenzayo yokuvuselela amandla.Ipaneli enye okanye ngaphezulu yelanga ingasetyenziswa, okanye inokudityaniswa kusetyenziswa ii-inverters kunye nezinye izinto zombane kunye nezomatshini.Iinkqubo ze-PV kufuneka zigcinwe kuzo zonke iindleko, kwaye nasiphi na isiganeko esincinci sinokunyuka ngokukhawuleza sibe yingxaki enkulu kwinkqubo yonke.

Ngoko ke, i-DC solar circuit breakers yinxalenye ebalulekileyo yeenkqubo ze-photovoltaic, kwaye ukukhuselwa kwe-thermal kunokunceda kwiimeko zangoku zokugqithiswa.Ukhuseleko lwemagnethi kwizaphuli zesekethe zesolar DC zinokuhamba kwisaphuli sesekethe yelanga xa kukho imisinga emininzi ephosakeleyo.Izaphuli zesekethe ze-DC zinokuphazamisa imisinga yempazamo nakwiimeko ezinzima kakhulu.Ukhuseleko lwemagnethi lubalulekile kwii-DC breakers njengoko lukhusela kwiisekethe ezimfutshane kunye nokunye ukusilela.

I-Photovoltaic circuit breakers ibaluleke kakhulu kwiinkqubo zepaneli zePV zelanga.Isiphaluka sepaneli yelanga yinxalenye ebiza kakhulu yenkqubo ye-photovoltaic.Ke ngoko, kubalulekile ukubakhusela nge-solar PV breaker circuit.I-PV DC i-circuit breakers ikwakhusela iisekethe kunye neebhodi zeesekethe.Iyakwazi ukuguqula i-radiation yelanga ibe yinto ethe ngqo ngokusebenzisa iiphaneli zelanga, kunye nofakelo lwe-photovoltaic lufuna ukusetyenziswa kwee-breaker circuit PV.

Kwiimoto zombane, iibhetri zazo zinokuhlawuliswa ngokusebenzisa isikhululo sokutshaja isithuthi sombane.Ngoko ke ezi nkqubo kufuneka DC MCBs ukuphepha iingozi ngenxa yokuba bonke kufuneka basebenzise ngqo langoku, iiphaneli zelanga kunye neemoto zombane zisebenza kakuhle kunye, kwaye akukho mfuneko yokuba ukuguqula langoku ngqo ukuya alternating yangoku, nto leyo inokulawulwa ngokulula ngokuzenzekelayo usebenzisa i Inkqubo yoqhawulo lwesekethe yeDC ukuphendula ngokukhawuleza.

Olunye uhlobo lwe-DC Circuit Breaker – i-DC Molded Case Circuit Breaker (DC MCCB)

I-DC ebunjiweyo i-case circuit breakers ilungele ukugcina amandla, ukuthutha kunye neesekethe ze-DC zoshishino.Izaphuli zesekethe ezibunjiweyo ziyilelwe ukuhlangabezana nezona mfuno ziphezulu zokusebenza, ngelixa iintlobo ngeentlobo zezincedisi ziyafumaneka ukuze zihambelane neenkcukacha zentsimi.Ii-MCCBs zanamhlanje ze-DC ziye zandisa izicelo zokubandakanya i-photovoltaics yelanga, izikhululo zokutshaja isithuthi sombane, ukugcinwa kwebhetri kunye neenkqubo ze-UPS, kunye nokuhanjiswa kwamandla orhwebo kunye noshishino lwe-DC.

I-DC MCCB inomsebenzi ofanayo nowe-AC MCCB, kwaye inomthwalo ogqithisiweyo kunye nemisebenzi yokukhusela i-short-circuit ye-high-current power distribution systems.

Zikwasetyenziswa kwiisekethe ezisebenza ngebhetri ezingasekelwanga kwi-backup engxamisekileyo kunye namandla okugcina.Ifumaneka ukuya kuthi ga kwi-150A, 750 VDC ukuya kuthi ga kwi-2000A, 600 VDC.Kuba abaphuli beesekethe ze-DC ezisetyenziswa kwiinkqubo ze-photovoltaic ezisekelwe kwi-solar kufakelo lwelanga, ubunjineli besicelo kunye nokuphonononga ukuqinisekisa ukuba iimfuno zokukhusela ziyafezekiswa.

I-DC Molded Case Circuit Breaker sisixhobo sokukhusela ulawulo lwesekethe yokugcina amandla, ukuthutha kunye neesekethe ze-DC zoshishino.Zingasetyenziswa kwiinkqubo ezisekelwe phantsi okanye ezingasekelwanga, ezidibana nombane ophezulu kunye namanqanaba asezantsi eempazamo zangoku kwiinkqubo zelanga.I-Slocable yenza i-high-voltage DC izaphuli zesekethe ezibonelela ngokusebenza okuphezulu kwaye zincede ukugcina iindleko ziphantsi, i-Slocable's MCCB DC izaphuli zihambisa ukuya kuthi ga kwi-150-800A, 380V-800V DC kwaye ihlangabezane nemigangatho engqongqo yobulunga.

Umahluko phakathi kwe-AC kunye ne-DC Circuit Breaker

Umahluko omkhulu phakathi kwangoku ngokuthe ngqo kunye nokutshintshana kwangoku kukuba i-voltage ephumayo yangoku ngokuthe ngqo ihlala.Ngokwahlukileyo, imveliso yombane ekutshintsheni imijikelo yangoku amaxesha amaninzi ngesekhondi, kwaye isiginali yokutshintshana kwangoku ihlala itshintsha ixabiso layo yonke isekhondi.I-arc ye-circuit breaker iya kucinywa kwi-0 V kwaye isiphaluka siya kukhuselwa kwi-high current.Kodwa umqondiso we-DC wangoku awutshintshi, usebenza kwimeko eqhubekayo, kwaye ixabiso le-voltage litshintsha kuphela xa isiphaluka sihamba okanye isiphaluka sehla kwixabiso elithile.

Ngaphandle koko, isekethe ye-DC iya kubonelela ngexabiso le-voltage rhoqo ngomzuzwana omnye ngomzuzu.Ngoko ke, akukhuthazwa ukuba kusetyenziswe i-AC circuit breaker kwi-DC state ekubeni akukho ndawo ye-volt kwi-DC state.

Izilumkiso xa uthenga ii-Circuit Breakers

Ngenxa yokuba iindlela zokhuseleko ze-AC kunye ne-DC currents ziphantse zafana, ii-breaker circuits ezithile ziyilelwe ukuba zisebenzise zombini.Nangona kunjalo, kubalulekile ukujonga kabini ukuba unikezelo lwamandla kunye ne-breaker circuit luhlobo olufanayo lwangoku.Ukuba ubeka i-breaker circuit engalunganga, ukufakela akuyi kukhuselwa ngokufanelekileyo kwaye ingozi yombane ingenzeka.

Enye into ebalulekileyo ekufuneka iqwalaselwe ukukala kwangoku kweentambo ezidibanisa i-DC mini breaker circuit kwisixhobo sombane esikhuselweyo.Nokuba useta i-DC breaker ngokuchanekileyo, iintambo ezingancinci zinokutshisa kakhulu, zinyibilikise ukugquma kwazo kwaye zibangele ukusilela kombane.

Izaphuli zesekethe zeDC azisetyenziswa njengesiqhelo njengezaphuli zesekethe ze-AC, kodwa zibaluleke kakhulu.Ii-DC MCBs zibuchwephesha obutsha noko, njengoko uninzi lwezixhobo zendlu zisebenza kumbane otshintshayo.Izaphuli zesekethe zeSolar DC zidlala indima ephambili ekukhuselweni kombane kwiitekhnoloji zokonga umbane ezixabisa kakhulu njengezibane ze-LED, iiphaneli zelanga ze-photovoltaic, kunye nezithuthi zombane.Njengoko obu buchwephesha bufikelela kuluhlu olubanzi lwabathengi, ii-solar circuit breakers ziya kuba nemarike enkulu.Kwelinye icala, abaphuli beesekethe ze-DC bubuchwephesha obusekwe kakuhle kwaye baziwa kakuhle kurhwebo, kwaye badlala indima ebalulekileyo ekukhuseleni oomatshini bokuchaneka okuphezulu kunye ne-arc welding.

Xa inkqubo yombane ifuna ukusetyenziswa kwe-breaker circuit yangoku ngokuthe ngqo, kudla ngokucetyiswa ukuba kugcinwe iinkonzo zeenjineli zeengcali kunye neengcali ukuqinisekisa ukuba unokukhetha kwaye ufake i-smart DC i-circuit breaker.